Merge remote-tracking branch 'qatar/master'

* qatar/master:
  configure: Check for the math function rint
  TechSmith Screen Codec 2 decoder
  rtsp: Add listen mode
  rtsp: Make rtsp_open_transport_ctx() non-static
  rtsp: Move rtsp_read_close
  rtsp: Parse the mode=receive/record parameter in transport lines

Conflicts:
	Changelog
	libavcodec/avcodec.h
	libavcodec/version.h
	libavformat/version.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>

Changelog

@@ -15,6 +15,8 @@ version next:
 - join audio filter
 - audio channel mapping filter
 - Microsoft ATC Screen decoder
+- RTSP listen mode
+- TechSmith Screen Codec 2 decoder
 - showwaves filter
 - LucasArts SMUSH playback support
 - SAMI demuxer and decoder

configure

@@ -1256,6 +1256,7 @@ HAVE_LIST="
     posix_memalign
     pthread_cancel
     rdtsc
+    rint
     round
     roundf
     rweflags
@@ -3288,6 +3289,7 @@ check_mathfunc log2
 check_mathfunc log2f
 check_mathfunc lrint
 check_mathfunc lrintf
+check_mathfunc rint
 check_mathfunc round
 check_mathfunc roundf
 check_mathfunc trunc

doc/general.texi

@@ -642,6 +642,8 @@ following image formats are supported:
     @tab fourcc: SP5X
 @item TechSmith Screen Capture Codec  @tab     @tab  X
     @tab fourcc: TSCC
+@item TechSmith Screen Capture Codec 2  @tab     @tab  X
+    @tab fourcc: TSC2
 @item Theora                 @tab  E  @tab  X
     @tab encoding supported through external library libtheora
 @item Tiertex Limited SEQ video  @tab     @tab  X

doc/protocols.texi

@@ -377,6 +377,8 @@ Flags for @code{rtsp_flags}:
 @table @option
 @item filter_src
 Accept packets only from negotiated peer address and port.
+@item listen
+Act as a server, listening for an incoming connection.
 @end table
 
 When receiving data over UDP, the demuxer tries to reorder received packets
@@ -409,6 +411,12 @@ To send a stream in realtime to a RTSP server, for others to watch:
 ffmpeg -re -i @var{input} -f rtsp -muxdelay 0.1 rtsp://server/live.sdp
 @end example
 
+To receive a stream in realtime:
+
+@example
+avconv -rtsp_flags listen -i rtsp://ownaddress/live.sdp @var{output}
+@end example
+
 @section sap
 
 Session Announcement Protocol (RFC 2974). This is not technically a

libavcodec/Makefile

@@ -451,6 +451,7 @@ OBJS-$(CONFIG_TRUEMOTION1_DECODER)     += truemotion1.o
 OBJS-$(CONFIG_TRUEMOTION2_DECODER)     += truemotion2.o
 OBJS-$(CONFIG_TRUESPEECH_DECODER)      += truespeech.o
 OBJS-$(CONFIG_TSCC_DECODER)            += tscc.o msrledec.o
+OBJS-$(CONFIG_TSCC2_DECODER)           += tscc2.o
 OBJS-$(CONFIG_TTA_DECODER)             += tta.o
 OBJS-$(CONFIG_TWINVQ_DECODER)          += twinvq.o celp_math.o
 OBJS-$(CONFIG_TXD_DECODER)             += txd.o s3tc.o

libavcodec/allcodecs.c

@@ -222,6 +222,7 @@ void avcodec_register_all(void)
     REGISTER_DECODER (TRUEMOTION1, truemotion1);
     REGISTER_DECODER (TRUEMOTION2, truemotion2);
     REGISTER_DECODER (TSCC, tscc);
+    REGISTER_DECODER (TSCC2, tscc2);
     REGISTER_DECODER (TXD, txd);
     REGISTER_DECODER (ULTI, ulti);
     REGISTER_DECODER (UTVIDEO, utvideo);

libavcodec/avcodec.h

@@ -259,6 +259,7 @@ enum CodecID {
     CODEC_ID_ZEROCODEC,
     CODEC_ID_MSS1,
     CODEC_ID_MSA1,
+    CODEC_ID_TSCC2,
     CODEC_ID_Y41P       = MKBETAG('Y','4','1','P'),
     CODEC_ID_ESCAPE130  = MKBETAG('E','1','3','0'),
     CODEC_ID_EXR        = MKBETAG('0','E','X','R'),

libavcodec/tscc2.c

@@ -0,0 +1,382 @@
+/*
+ * TechSmith Screen Codec 2 (aka Dora) decoder
+ * Copyright (c) 2012 Konstantin Shishkov
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * TechSmith Screen Codec 2 decoder
+ */
+
+#define BITSTREAM_READER_LE
+#include "avcodec.h"
+#include "get_bits.h"
+#include "bytestream.h"
+#include "tscc2data.h"
+
+typedef struct TSCC2Context {
+    AVCodecContext *avctx;
+    AVFrame        pic;
+    int            mb_width, mb_height;
+    uint8_t        *slice_quants;
+    int            quant[2];
+    int            q[2][3];
+    GetBitContext  gb;
+
+    VLC            dc_vlc, nc_vlc[NUM_VLC_SETS], ac_vlc[NUM_VLC_SETS];
+    int            block[16];
+} TSCC2Context;
+
+static av_cold void free_vlcs(TSCC2Context *c)
+{
+    int i;
+
+    ff_free_vlc(&c->dc_vlc);
+    for (i = 0; i < NUM_VLC_SETS; i++) {
+        ff_free_vlc(c->nc_vlc + i);
+        ff_free_vlc(c->ac_vlc + i);
+    }
+}
+
+static av_cold int init_vlcs(TSCC2Context *c)
+{
+    int i, ret;
+
+    ret = ff_init_vlc_sparse(&c->dc_vlc, 9, DC_VLC_COUNT,
+                             tscc2_dc_vlc_bits,  1, 1,
+                             tscc2_dc_vlc_codes, 2, 2,
+                             tscc2_dc_vlc_syms,  2, 2, INIT_VLC_LE);
+    if (ret)
+        return ret;
+
+    for (i = 0; i < NUM_VLC_SETS; i++) {
+        ret = ff_init_vlc_sparse(c->nc_vlc + i, 9, 16,
+                                 tscc2_nc_vlc_bits[i],  1, 1,
+                                 tscc2_nc_vlc_codes[i], 2, 2,
+                                 tscc2_nc_vlc_syms,     1, 1, INIT_VLC_LE);
+        if (ret) {
+            free_vlcs(c);
+            return ret;
+        }
+        ret = ff_init_vlc_sparse(c->ac_vlc + i, 9, tscc2_ac_vlc_sizes[i],
+                                 tscc2_ac_vlc_bits[i],  1, 1,
+                                 tscc2_ac_vlc_codes[i], 2, 2,
+                                 tscc2_ac_vlc_syms[i],  2, 2, INIT_VLC_LE);
+        if (ret) {
+            free_vlcs(c);
+            return ret;
+        }
+    }
+
+    return 0;
+}
+
+#define DEQUANT(val, q) ((q * val + 0x80) >> 8)
+#define DCT1D(d0, d1, d2, d3, s0, s1, s2, s3, OP) \
+    OP(d0, 5 * ((s0) + (s1) + (s2)) + 2 * (s3));  \
+    OP(d1, 5 * ((s0) - (s2) - (s3)) + 2 * (s1));  \
+    OP(d2, 5 * ((s0) - (s2) + (s3)) - 2 * (s3));  \
+    OP(d3, 5 * ((s0) - (s1) + (s2)) - 2 * (s3));  \
+
+#define COL_OP(a, b)  a = b
+#define ROW_OP(a, b)  a = av_clip_uint8((((b) + 0x20) >> 6) + 0x80)
+
+static void tscc2_idct4_put(int *in, int q[3], uint8_t *dst, int stride)
+{
+    int i;
+    int tblk[4 * 4];
+    int t0, t1, t2, t3;
+
+    for (i = 0; i < 4; i++) {
+        t0 = DEQUANT(q[0 + (i & 1)], in[0 * 4 + i]);
+        t1 = DEQUANT(q[1 + (i & 1)], in[1 * 4 + i]);
+        t2 = DEQUANT(q[0 + (i & 1)], in[2 * 4 + i]);
+        t3 = DEQUANT(q[1 + (i & 1)], in[3 * 4 + i]);
+        DCT1D(tblk[0 * 4 + i], tblk[1 * 4 + i],
+              tblk[2 * 4 + i], tblk[3 * 4 + i],
+              t0, t1, t2, t3, COL_OP);
+    }
+    for (i = 0; i < 4; i++) {
+        DCT1D(dst[0], dst[1], dst[2], dst[3],
+              tblk[i * 4 + 0], tblk[i * 4 + 1],
+              tblk[i * 4 + 2], tblk[i * 4 + 3], ROW_OP);
+        dst += stride;
+    }
+}
+
+static int tscc2_decode_mb(TSCC2Context *c, int *q, int vlc_set,
+                           uint8_t *dst, int stride, int plane)
+{
+    GetBitContext *gb = &c->gb;
+    int prev_dc, dc, nc, ac, bpos, val;
+    int i, j, k, l;
+
+    if (get_bits1(gb)) {
+        if (get_bits1(gb)) {
+            val = get_bits(gb, 8);
+            for (i = 0; i < 8; i++, dst += stride)
+                memset(dst, val, 16);
+        } else {
+            if (get_bits_left(gb) < 16 * 8 * 8)
+                return AVERROR_INVALIDDATA;
+            for (i = 0; i < 8; i++) {
+                for (j = 0; j < 16; j++)
+                    dst[j] = get_bits(gb, 8);
+                dst += stride;
+            }
+        }
+        return 0;
+    }
+
+    prev_dc = 0;
+    for (j = 0; j < 2; j++) {
+        for (k = 0; k < 4; k++) {
+            if (!(j | k)) {
+                dc = get_bits(gb, 8);
+            } else {
+                dc = get_vlc2(gb, c->dc_vlc.table, 9, 2);
+                if (dc == -1)
+                    return AVERROR_INVALIDDATA;
+                if (dc == 0x100)
+                    dc = get_bits(gb, 8);
+            }
+            dc          = (dc + prev_dc) & 0xFF;
+            prev_dc     = dc;
+            c->block[0] = dc - 0x80;
+
+            nc = get_vlc2(gb, c->nc_vlc[vlc_set].table, 9, 1);
+            if (nc == -1)
+                return AVERROR_INVALIDDATA;
+
+            bpos = 1;
+            memset(c->block + 1, 0, 15 * sizeof(*c->block));
+            for (l = 0; l < nc; l++) {
+                ac = get_vlc2(gb, c->ac_vlc[vlc_set].table, 9, 2);
+                if (ac == -1)
+                    return AVERROR_INVALIDDATA;
+                if (ac == 0x1000)
+                    ac = get_bits(gb, 12);
+                bpos += ac & 0xF;
+                if (bpos >= 64)
+                    return AVERROR_INVALIDDATA;
+                val = sign_extend(ac >> 4, 8);
+                c->block[tscc2_zigzag[bpos++]] = val;
+            }
+            tscc2_idct4_put(c->block, q, dst + k * 4, stride);
+        }
+        dst += 4 * stride;
+    }
+    return 0;
+}
+
+static int tscc2_decode_slice(TSCC2Context *c, int mb_y,
+                              const uint8_t *buf, int buf_size)
+{
+    int i, mb_x, q, ret;
+    int off;
+
+    init_get_bits(&c->gb, buf, buf_size * 8);
+
+    for (mb_x = 0; mb_x < c->mb_width; mb_x++) {
+        q = c->slice_quants[mb_x + c->mb_width * mb_y];
+
+        if (q == 0 || q == 3) // skip block
+            continue;
+        for (i = 0; i < 3; i++) {
+            off = mb_x * 16 + mb_y * 8 * c->pic.linesize[i];
+            ret = tscc2_decode_mb(c, c->q[q - 1], c->quant[q - 1] - 2,
+                                  c->pic.data[i] + off, c->pic.linesize[i], i);
+            if (ret)
+                return ret;
+        }
+    }
+
+    return 0;
+}
+
+static int tscc2_decode_frame(AVCodecContext *avctx, void *data,
+                              int *data_size, AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    TSCC2Context *c = avctx->priv_data;
+    GetByteContext gb;
+    uint32_t frame_type, size;
+    int i, val, len, pos = 0;
+    int num_mb = c->mb_width * c->mb_height;
+    int ret;
+
+    bytestream2_init(&gb, buf, buf_size);
+    frame_type = bytestream2_get_byte(&gb);
+    if (frame_type > 1) {
+        av_log(avctx, AV_LOG_ERROR, "Incorrect frame type %d\n", frame_type);
+        return AVERROR_INVALIDDATA;
+    }
+
+    c->pic.reference    = 3;
+    c->pic.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE |
+                          FF_BUFFER_HINTS_REUSABLE;
+    if ((ret = avctx->reget_buffer(avctx, &c->pic)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "reget_buffer() failed\n");
+        return ret;
+    }
+
+    if (frame_type == 0) {
+        *data_size      = sizeof(AVFrame);
+        *(AVFrame*)data = c->pic;
+
+        return buf_size;
+    }
+
+    if (bytestream2_get_bytes_left(&gb) < 4) {
+        av_log(avctx, AV_LOG_ERROR, "Frame is too short\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    c->quant[0] = bytestream2_get_byte(&gb);
+    c->quant[1] = bytestream2_get_byte(&gb);
+    if (c->quant[0] < 2 || c->quant[0] > NUM_VLC_SETS + 1 ||
+        c->quant[1] < 2 || c->quant[1] > NUM_VLC_SETS + 1) {
+        av_log(avctx, AV_LOG_ERROR, "Invalid quantisers %d / %d\n",
+               c->quant[0], c->quant[1]);
+        return AVERROR_INVALIDDATA;
+    }
+
+    for (i = 0; i < 3; i++) {
+        c->q[0][i] = tscc2_quants[c->quant[0] - 2][i];
+        c->q[1][i] = tscc2_quants[c->quant[1] - 2][i];
+    }
+
+    bytestream2_skip(&gb, 1);
+
+    size = bytestream2_get_le32(&gb);
+    if (size > bytestream2_get_bytes_left(&gb)) {
+        av_log(avctx, AV_LOG_ERROR, "Slice properties chunk is too large\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    for (i = 0; i < size; i++) {
+        val   = bytestream2_get_byte(&gb);
+        len   = val & 0x3F;
+        val >>= 6;
+        if (pos + len > num_mb) {
+            av_log(avctx, AV_LOG_ERROR, "Too many slice properties\n");
+            return AVERROR_INVALIDDATA;
+        }
+        memset(c->slice_quants + pos, val, len);
+        pos += len;
+    }
+    if (pos < num_mb) {
+        av_log(avctx, AV_LOG_ERROR, "Too few slice properties (%d / %d)\n",
+               pos, num_mb);
+        return AVERROR_INVALIDDATA;
+    }
+
+    for (i = 0; i < c->mb_height; i++) {
+        size = bytestream2_peek_byte(&gb);
+        if (size & 1) {
+            size = bytestream2_get_byte(&gb) - 1;
+        } else {
+            size = bytestream2_get_le32(&gb) >> 1;
+        }
+        if (!size) {
+            int skip_row = 1, j, off = i * c->mb_width;
+            for (j = 0; j < c->mb_width; j++) {
+                if (c->slice_quants[off + i] == 1 ||
+                    c->slice_quants[off + i] == 2) {
+                    skip_row = 0;
+                    break;
+                }
+            }
+            if (!skip_row) {
+                av_log(avctx, AV_LOG_ERROR, "Non-skip row with zero size\n");
+                return AVERROR_INVALIDDATA;
+            }
+        }
+        if (bytestream2_get_bytes_left(&gb) < size) {
+            av_log(avctx, AV_LOG_ERROR, "Invalid slice size (%d/%d)\n",
+                   size, bytestream2_get_bytes_left(&gb));
+            return AVERROR_INVALIDDATA;
+        }
+        ret = tscc2_decode_slice(c, i, buf + bytestream2_tell(&gb), size);
+        if (ret) {
+            av_log(avctx, AV_LOG_ERROR, "Error decoding slice %d\n", i);
+            return ret;
+        }
+        bytestream2_skip(&gb, size);
+    }
+
+    *data_size      = sizeof(AVFrame);
+    *(AVFrame*)data = c->pic;
+
+    /* always report that the buffer was completely consumed */
+    return buf_size;
+}
+
+static av_cold int tscc2_decode_init(AVCodecContext *avctx)
+{
+    TSCC2Context * const c = avctx->priv_data;
+    int ret;
+
+    c->avctx = avctx;
+
+    avctx->pix_fmt = PIX_FMT_YUV444P;
+
+    if ((ret = init_vlcs(c)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot initialise VLCs\n");
+        return ret;
+    }
+
+    c->mb_width     = FFALIGN(avctx->width,  16) >> 4;
+    c->mb_height    = FFALIGN(avctx->height,  8) >> 3;
+    c->slice_quants = av_malloc(c->mb_width * c->mb_height);
+    if (!c->slice_quants) {
+        av_log(avctx, AV_LOG_ERROR, "Cannot allocate slice information\n");
+        free_vlcs(c);
+        return AVERROR(ENOMEM);
+    }
+
+    avctx->coded_frame = &c->pic;
+
+    return 0;
+}
+
+static av_cold int tscc2_decode_end(AVCodecContext *avctx)
+{
+    TSCC2Context * const c = avctx->priv_data;
+
+    if (c->pic.data[0])
+        avctx->release_buffer(avctx, &c->pic);
+    av_freep(&c->slice_quants);
+    free_vlcs(c);
+
+    return 0;
+}
+
+AVCodec ff_tscc2_decoder = {
+    .name           = "tscc2",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = CODEC_ID_TSCC2,
+    .priv_data_size = sizeof(TSCC2Context),
+    .init           = tscc2_decode_init,
+    .close          = tscc2_decode_end,
+    .decode         = tscc2_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("TechSmith Screen Codec 2"),
+};

libavcodec/tscc2data.h

@@ -0,0 +1,935 @@
+/*
+ * TechSmith Screen Codec 2 (aka Dora) decoder
+ * Copyright (c) 2012 Konstantin Shishkov
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_TSCC2_DATA_H
+#define AVCODEC_TSCC2_DATA_H
+
+#include <stdint.h>
+
+static const uint8_t tscc2_zigzag[16] = {
+   0,  1,  4,  8,
+   5,  2,  3,  6,
+   9, 12, 13, 10,
+   7, 11, 14, 15
+};
+
+#define NUM_VLC_SETS 13
+
+static const uint16_t tscc2_quants[NUM_VLC_SETS][3] = {
+    {  655,  861, 1130 }, {  983, 1291, 1695 }, { 1311, 1721, 2260 },
+    { 1638, 2151, 2825 }, { 1966, 2582, 3390 }, { 2294, 3012, 3955 },
+    { 2621, 3442, 4520 }, { 2949, 3872, 5085 }, { 3277, 4303, 5650 },
+    { 3604, 4733, 6215 }, { 3932, 5163, 6780 }, { 4260, 5593, 7345 },
+    { 4588, 6024, 7910 },
+};
+
+#define DC_VLC_COUNT 47
+
+static const uint16_t tscc2_dc_vlc_syms[DC_VLC_COUNT] = {
+   0x100, 0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9,
+    0xF8, 0xF7, 0xF6, 0xF5, 0xF4, 0xF3, 0xF2, 0xF1,
+    0xF0, 0xEF, 0xEE, 0xED, 0xEC, 0xEB, 0xEA, 0x17,
+    0x16, 0x15, 0x14, 0x13, 0x12, 0x11, 0x10, 0x0F,
+    0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08, 0x07,
+    0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
+};
+
+static const uint16_t tscc2_dc_vlc_codes[DC_VLC_COUNT] = {
+    0x000A, 0x0000, 0x0006, 0x002E, 0x0002, 0x000E, 0x001A, 0x007E,
+    0x004E, 0x005A, 0x00E2, 0x01BE, 0x01BA, 0x00BA, 0x0072, 0x0022,
+    0x02BE, 0x00BE, 0x033A, 0x03F2, 0x01F2, 0x03A2, 0x0122, 0x0322,
+    0x01A2, 0x0172, 0x0372, 0x013A, 0x00CE, 0x02CE, 0x02FE, 0x00FE,
+    0x00A2, 0x00F2, 0x003A, 0x01CE, 0x01FE, 0x0062, 0x00DA, 0x003E,
+    0x0032, 0x007A, 0x0012, 0x001E, 0x0016, 0x0004, 0x0001,
+};
+
+static const uint8_t tscc2_dc_vlc_bits[DC_VLC_COUNT] = {
+     5,  3,  5,  6,  6,  7,  7,  8,
+     8,  8,  8,  9,  9,  9,  9,  9,
+    10, 10, 10, 10, 10, 10, 10, 10,
+    10, 10, 10, 10, 10, 10, 10, 10,
+     9,  9,  9,  9,  9,  8,  8,  8,
+     7,  7,  6,  6,  5,  3,  1,
+};
+
+static const uint8_t tscc2_nc_vlc_syms[16] = {
+    0x0F, 0x0E, 0x0D, 0x0C, 0x0B, 0x0A, 0x09, 0x08,
+    0x07, 0x06, 0x05, 0x04, 0x03, 0x02, 0x01, 0x00,
+};
+
+static const uint16_t tscc2_nc_vlc_codes[NUM_VLC_SETS][16] = {
+    { 0x0023, 0x0003, 0x0031, 0x0021, 0x0011, 0x0053, 0x0013, 0x0001,
+      0x0009, 0x0029, 0x0033, 0x0019, 0x000B, 0x0005, 0x0007, 0x0000, },
+    { 0x0030, 0x0022, 0x0028, 0x0020, 0x0008, 0x0000, 0x0032, 0x0072,
+      0x0010, 0x0002, 0x0012, 0x0018, 0x000A, 0x0004, 0x0006, 0x0001, },
+    { 0x0032, 0x0038, 0x0020, 0x0008, 0x0002, 0x0018, 0x0072, 0x0000,
+      0x0028, 0x0022, 0x0012, 0x0010, 0x000A, 0x0004, 0x0006, 0x0001, },
+    { 0x0032, 0x0010, 0x0072, 0x0030, 0x0022, 0x0038, 0x0008, 0x0028,
+      0x0018, 0x0002, 0x0012, 0x0000, 0x000A, 0x0004, 0x0006, 0x0001, },
+    { 0x0012, 0x0052, 0x0000, 0x0020, 0x0018, 0x0022, 0x0008, 0x0028,
+      0x0038, 0x0002, 0x0032, 0x0010, 0x000A, 0x0004, 0x0006, 0x0001, },
+    { 0x0016, 0x0096, 0x0006, 0x0046, 0x0056, 0x0002, 0x0036, 0x0076,
+      0x0012, 0x0022, 0x0032, 0x0026, 0x000A, 0x000E, 0x0000, 0x0001, },
+    { 0x001A, 0x009A, 0x0032, 0x0072, 0x005A, 0x007A, 0x003A, 0x0002,
+      0x0012, 0x0022, 0x000A, 0x002A, 0x0006, 0x000E, 0x0000, 0x0001, },
+    { 0x002A, 0x00AA, 0x0002, 0x0042, 0x006A, 0x003A, 0x007A, 0x0022,
+      0x0032, 0x0012, 0x000A, 0x001A, 0x0006, 0x000E, 0x0000, 0x0001, },
+    { 0x0042, 0x00C2, 0x0002, 0x000A, 0x004A, 0x003A, 0x007A, 0x0022,
+      0x0012, 0x0032, 0x002A, 0x001A, 0x0006, 0x000E, 0x0000, 0x0001, },
+    { 0x00BA, 0x01BA, 0x003A, 0x0012, 0x0052, 0x007A, 0x0002, 0x0022,
+      0x0032, 0x000A, 0x002A, 0x001A, 0x0000, 0x0004, 0x0006, 0x0001, },
+    { 0x00AA, 0x01AA, 0x002A, 0x0022, 0x0062, 0x006A, 0x0002, 0x0012,
+      0x0032, 0x000A, 0x001A, 0x003A, 0x0000, 0x0004, 0x0006, 0x0001, },
+    { 0x00AA, 0x01AA, 0x002A, 0x0022, 0x0062, 0x006A, 0x0002, 0x0012,
+      0x0032, 0x000A, 0x003A, 0x001A, 0x0000, 0x0004, 0x0006, 0x0001, },
+    { 0x008A, 0x018A, 0x000A, 0x0022, 0x0062, 0x004A, 0x0002, 0x0012,
+      0x0032, 0x002A, 0x001A, 0x003A, 0x0000, 0x0004, 0x0006, 0x0001, },
+};
+
+static const uint8_t tscc2_nc_vlc_bits[NUM_VLC_SETS][16] = {
+    { 6, 6, 6, 6, 6, 7, 7, 6, 6, 6, 6, 5, 4, 3, 3, 1 },
+    { 6, 6, 6, 6, 6, 6, 7, 7, 6, 6, 6, 5, 4, 3, 3, 1 },
+    { 7, 6, 6, 6, 6, 6, 7, 6, 6, 6, 6, 5, 4, 3, 3, 1 },
+    { 7, 6, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 1 },
+    { 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 1 },
+    { 8, 8, 7, 7, 7, 6, 7, 7, 6, 6, 6, 6, 4, 4, 2, 1 },
+    { 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 2, 1 },
+    { 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 2, 1 },
+    { 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 2, 1 },
+    { 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1 },
+    { 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1 },
+    { 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1 },
+    { 9, 9, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1 },
+};
+
+static const uint16_t ac_vlc_desc0_syms[172] = {
+   0x1000, 0xFF8, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2, 0xFF1,
+    0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1, 0xFE0,
+    0xFD6, 0xFD5, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC6, 0xFC5,
+    0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB5, 0xFB3, 0xFB2, 0xFB1,
+    0xFB0, 0xFA5, 0xFA3, 0xFA1, 0xFA0, 0xF95, 0xF91, 0xF90,
+    0xF83, 0xF81, 0xF80, 0xF73, 0xF71, 0xF70, 0xF61, 0xF60,
+    0xF51, 0xF50, 0xF45, 0xF41, 0xF40, 0xF31, 0xF30, 0xF21,
+    0xF20, 0xF10, 0xF00, 0xEF0, 0xEE0, 0xED5, 0xED1, 0xED0,
+    0xEC0, 0xEB0, 0xEA0, 0xE90, 0xE80, 0xE70, 0xE60, 0xE50,
+    0xE40, 0xE30, 0xE20, 0xE10, 0xE00, 0xDF0, 0xDE0, 0xDD0,
+    0xDC0, 0xDB0, 0xDA0, 0xD90, 0xD80, 0xD60, 0xCD1, 0x280,
+    0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
+    0x1F0, 0x1E0, 0x1D0, 0x1C0, 0x1B0, 0x1A1, 0x1A0, 0x190,
+    0x180, 0x170, 0x160, 0x150, 0x140, 0x130, 0x121, 0x120,
+    0x111, 0x110, 0x101, 0x100, 0x0F1, 0x0F0, 0x0E1, 0x0E0,
+    0x0D1, 0x0D0, 0x0C1, 0x0C0, 0x0B1, 0x0B0, 0x0A5, 0x0A1,
+    0x0A0, 0x091, 0x090, 0x081, 0x080, 0x075, 0x071, 0x070,
+    0x065, 0x063, 0x061, 0x060, 0x055, 0x053, 0x052, 0x051,
+    0x050, 0x046, 0x045, 0x043, 0x042, 0x041, 0x040, 0x036,
+    0x035, 0x033, 0x032, 0x031, 0x030, 0x026, 0x025, 0x024,
+    0x023, 0x022, 0x021, 0x020, 0x018, 0x016, 0x015, 0x014,
+    0x013, 0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc0_codes[172] = {
+    0x001F, 0x0D71, 0x013F, 0x006C, 0x00A7, 0x0067, 0x001C, 0x0008,
+    0x0005, 0x06F1, 0x002C, 0x04BA, 0x0072, 0x01AA, 0x0002, 0x0006,
+    0x06AC, 0x02AF, 0x06EF, 0x018F, 0x000A, 0x0009, 0x02AC, 0x042A,
+    0x06E1, 0x068F, 0x00B1, 0x0000, 0x0317, 0x0C17, 0x0612, 0x010F,
+    0x0011, 0x0FBA, 0x002A, 0x0172, 0x000C, 0x05AC, 0x03D7, 0x0037,
+    0x0E8F, 0x02F2, 0x0041, 0x0BE1, 0x057F, 0x004A, 0x00AF, 0x006F,
+    0x06AA, 0x0097, 0x0101, 0x0012, 0x0081, 0x0571, 0x0092, 0x0EAF,
+    0x01BF, 0x00D7, 0x0031, 0x0001, 0x01F2, 0x0F17, 0x053A, 0x00BF,
+    0x038F, 0x0217, 0x0371, 0x01F1, 0x01BA, 0x022A, 0x02BF, 0x028F,
+    0x008F, 0x03F1, 0x00E1, 0x00BA, 0x00F2, 0x0EBF, 0x06AF, 0x048F,
+    0x0FE1, 0x0271, 0x07BA, 0x0D3A, 0x0C12, 0x08AC, 0x0717, 0x00AC,
+    0x0412, 0x0901, 0x04E1, 0x07E1, 0x0417, 0x0CAF, 0x04AC, 0x01AC,
+    0x04F2, 0x03BA, 0x05D7, 0x07F1, 0x01D7, 0x04AF, 0x04EF, 0x03AC,
+    0x00AA, 0x01E1, 0x0071, 0x00F1, 0x012C, 0x03EF, 0x082A, 0x0112,
+    0x03E1, 0x01FA, 0x0DAC, 0x0131, 0x0E12, 0x000F, 0x0B17, 0x007F,
+    0x0AEF, 0x007A, 0x02AA, 0x0061, 0x0671, 0x0027, 0x013A, 0x058F,
+    0x00FF, 0x033A, 0x0032, 0x0301, 0x0021, 0x0C8F, 0x037F, 0x0077,
+    0x02F1, 0x02E1, 0x003A, 0x003C, 0x0212, 0x0817, 0x0CE1, 0x003F,
+    0x0007, 0x0017, 0x0501, 0x02BA, 0x06BF, 0x0057, 0x0010, 0x02EF,
+    0x0117, 0x017F, 0x00EF, 0x006A, 0x0019, 0x0171, 0x01EF, 0x06BA,
+    0x012A, 0x00FA, 0x0022, 0x000E, 0x0AE1, 0x01AF, 0x0052, 0x002F,
+    0x004F, 0x001A, 0x0004, 0x0003,
+};
+
+static const uint8_t ac_vlc_desc0_bits[172] = {
+     6, 12,  9,  7,  8,  7,  6,  4,
+     3, 11,  9, 11,  9,  9,  6,  4,
+    11, 11, 11, 11,  7,  5, 11, 11,
+    11, 12,  8,  5, 12, 12, 12,  9,
+     6, 12, 12,  9,  6, 12, 10,  7,
+    12, 10,  7, 12, 11,  7, 11,  8,
+    11,  8, 12, 11,  8, 12,  8, 12,
+     9,  9,  9,  9,  9, 12, 12, 10,
+    10, 10, 10, 10, 10, 10, 11, 11,
+    11, 11, 11, 11, 11, 12, 12, 12,
+    12, 11, 12, 12, 12, 12, 12, 12,
+    12, 12, 12, 12, 12, 12, 11, 11,
+    11, 11, 11, 11, 11, 12, 11, 10,
+    10, 10, 10, 10,  9, 10, 12,  9,
+    12,  9, 12,  9, 12,  9, 12,  9,
+    12,  8, 11,  8, 11,  8, 11, 11,
+     8, 10,  7, 10,  7, 12, 10,  7,
+    11, 12,  9,  6, 11, 12, 12,  9,
+     6, 12, 11, 11, 12,  8,  5, 12,
+    10, 11, 11,  7,  5, 11, 10, 11,
+     9,  9,  6,  4, 12,  9,  7,  8,
+     7,  6,  4,  3,
+};
+
+static const uint16_t ac_vlc_desc1_syms[169] = {
+   0x1000, 0xFF8, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2, 0xFF1,
+    0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1, 0xFE0,
+    0xFD6, 0xFD5, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC6, 0xFC5,
+    0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB6, 0xFB5, 0xFB3, 0xFB2,
+    0xFB1, 0xFB0, 0xFA6, 0xFA5, 0xFA3, 0xFA1, 0xFA0, 0xF95,
+    0xF93, 0xF91, 0xF90, 0xF85, 0xF81, 0xF80, 0xF71, 0xF70,
+    0xF61, 0xF60, 0xF51, 0xF50, 0xF45, 0xF41, 0xF40, 0xF31,
+    0xF30, 0xF21, 0xF20, 0xF11, 0xF10, 0xF01, 0xF00, 0xEF1,
+    0xEF0, 0xEE1, 0xEE0, 0xED0, 0xEC6, 0xEC0, 0xEB6, 0xEB0,
+    0xEA0, 0xE90, 0xE80, 0xE70, 0xE60, 0xE50, 0xE40, 0xE33,
+    0xE31, 0xE30, 0xE20, 0xE10, 0xE00, 0xDF0, 0xDE1, 0xDE0,
+    0xDC0, 0xDB0, 0xDA0, 0x250, 0x240, 0x1F0, 0x1E0, 0x1D0,
+    0x1C0, 0x1B0, 0x1A0, 0x190, 0x180, 0x170, 0x160, 0x150,
+    0x140, 0x130, 0x120, 0x111, 0x110, 0x101, 0x100, 0x0F1,
+    0x0F0, 0x0E1, 0x0E0, 0x0D1, 0x0D0, 0x0C6, 0x0C1, 0x0C0,
+    0x0B1, 0x0B0, 0x0A1, 0x0A0, 0x095, 0x091, 0x090, 0x085,
+    0x081, 0x080, 0x075, 0x071, 0x070, 0x065, 0x063, 0x061,
+    0x060, 0x055, 0x053, 0x052, 0x051, 0x050, 0x046, 0x045,
+    0x043, 0x042, 0x041, 0x040, 0x036, 0x035, 0x033, 0x032,
+    0x031, 0x030, 0x026, 0x025, 0x024, 0x023, 0x022, 0x021,
+    0x020, 0x018, 0x016, 0x015, 0x014, 0x013, 0x012, 0x011,
+    0x010,
+};
+
+static const uint16_t ac_vlc_desc1_codes[169] = {
+    0x0019, 0x027D, 0x0084, 0x0044, 0x009D, 0x003D, 0x000A, 0x0002,
+    0x0003, 0x00EA, 0x02FD, 0x017A, 0x01C6, 0x00B6, 0x0026, 0x000E,
+    0x0095, 0x0260, 0x032A, 0x0360, 0x0006, 0x0005, 0x05B6, 0x036A,
+    0x06F6, 0x0704, 0x00FA, 0x0010, 0x0279, 0x04D4, 0x00F6, 0x066A,
+    0x001D, 0x0029, 0x05F9, 0x0846, 0x04F6, 0x01D4, 0x0038, 0x0446,
+    0x0160, 0x031D, 0x0075, 0x0054, 0x02D4, 0x005A, 0x05FD, 0x0040,
+    0x06EA, 0x0055, 0x0460, 0x009A, 0x052A, 0x00A0, 0x00D8, 0x0380,
+    0x017D, 0x092A, 0x00F9, 0x0D7A, 0x0179, 0x0304, 0x002A, 0x0104,
+    0x01A0, 0x0780, 0x007D, 0x03F9, 0x0C46, 0x03EA, 0x0E6A, 0x0204,
+    0x01FD, 0x051D, 0x02AA, 0x05EA, 0x00AA, 0x0080, 0x067D, 0x09EA,
+    0x0C95, 0x09F9, 0x07B6, 0x0DB6, 0x012A, 0x0904, 0x0454, 0x0FB6,
+    0x0960, 0x08D4, 0x0495, 0x0F80, 0x0560, 0x0B04, 0x057A, 0x0079,
+    0x0795, 0x0E7D, 0x0060, 0x076A, 0x03B6, 0x0395, 0x0180, 0x02A0,
+    0x006A, 0x0195, 0x0295, 0x0646, 0x03FD, 0x01F9, 0x0154, 0x0DF9,
+    0x00C6, 0x0F95, 0x01F6, 0x0480, 0x0000, 0x0A79, 0x04AA, 0x00E0,
+    0x0246, 0x001A, 0x0479, 0x0015, 0x0D60, 0x0280, 0x0018, 0x01EA,
+    0x037A, 0x003A, 0x011D, 0x00FD, 0x0035, 0x0A7D, 0x04A0, 0x0146,
+    0x0024, 0x01B6, 0x0504, 0x0046, 0x0020, 0x0009, 0x00D4, 0x03AA,
+    0x0679, 0x026A, 0x0036, 0x0008, 0x02F6, 0x01AA, 0x016A, 0x0254,
+    0x0039, 0x000D, 0x0004, 0x0176, 0x02EA, 0x007A, 0x0076, 0x0016,
+    0x0001, 0x0879, 0x0058, 0x0014, 0x00D5, 0x005D, 0x0034, 0x000C,
+    0x0007,
+};
+
+static const uint8_t ac_vlc_desc1_bits[169] = {
+     6, 12,  8,  7,  8,  7,  6,  4,
+     3, 10, 10, 11,  9,  9,  6,  4,
+    11, 10, 10, 10,  7,  5, 12, 11,
+    11, 11,  8,  5, 12, 11, 11, 12,
+     9,  6, 12, 12, 11,  9,  6, 12,
+    12, 10,  7, 11, 10,  7, 11,  7,
+    11,  8, 11,  8, 11, 11,  8, 11,
+     9, 12,  9, 12,  9, 12,  9, 12,
+     9, 12, 10, 10, 12, 10, 12, 10,
+    11, 11, 10, 11, 11, 11, 12, 12,
+    12, 12, 12, 12, 12, 12, 11, 12,
+    12, 12, 12, 12, 12, 12, 12, 12,
+    12, 12, 11, 11, 11, 11, 10, 10,
+    10, 10, 10, 11, 10, 12,  9, 12,
+     9, 12,  9, 11,  8, 12, 11,  8,
+    11,  8, 11,  8, 12, 10,  7, 12,
+    10,  7, 11, 10,  7, 12, 11,  9,
+     6, 11, 11, 12,  8,  6, 12, 10,
+    11, 11,  8,  5, 11, 10, 10, 10,
+     7,  5, 10,  9, 11,  9,  9,  6,
+     4, 12,  8,  7,  8,  7,  6,  4,
+     3,
+};
+
+static const uint16_t ac_vlc_desc2_syms[165] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD6, 0xFD5, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC6,
+    0xFC5, 0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB6, 0xFB5, 0xFB3,
+    0xFB2, 0xFB1, 0xFB0, 0xFA5, 0xFA3, 0xFA1, 0xFA0, 0xF95,
+    0xF93, 0xF91, 0xF90, 0xF81, 0xF80, 0xF75, 0xF71, 0xF70,
+    0xF61, 0xF60, 0xF51, 0xF50, 0xF41, 0xF40, 0xF36, 0xF31,
+    0xF30, 0xF26, 0xF21, 0xF20, 0xF16, 0xF11, 0xF10, 0xF06,
+    0xF01, 0xF00, 0xEF1, 0xEF0, 0xEE1, 0xEE0, 0xED0, 0xEC0,
+    0xEB3, 0xEB1, 0xEB0, 0xEA3, 0xEA1, 0xEA0, 0xE90, 0xE81,
+    0xE80, 0xE71, 0xE70, 0xE61, 0xE60, 0xE50, 0xE40, 0xE30,
+    0xE10, 0xE00, 0x241, 0x240, 0x231, 0x1D0, 0x1C0, 0x1B3,
+    0x1B0, 0x1A0, 0x190, 0x180, 0x170, 0x160, 0x150, 0x140,
+    0x130, 0x120, 0x110, 0x100, 0x0F0, 0x0E0, 0x0D1, 0x0D0,
+    0x0C1, 0x0C0, 0x0B1, 0x0B0, 0x0A5, 0x0A1, 0x0A0, 0x096,
+    0x095, 0x091, 0x090, 0x086, 0x085, 0x081, 0x080, 0x075,
+    0x071, 0x070, 0x065, 0x063, 0x061, 0x060, 0x055, 0x053,
+    0x052, 0x051, 0x050, 0x045, 0x043, 0x042, 0x041, 0x040,
+    0x036, 0x035, 0x033, 0x032, 0x031, 0x030, 0x026, 0x025,
+    0x024, 0x023, 0x022, 0x021, 0x020, 0x018, 0x016, 0x015,
+    0x014, 0x013, 0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc2_codes[165] = {
+    0x0034, 0x059C, 0x0280, 0x001C, 0x004C, 0x00BD, 0x0020, 0x003C,
+    0x000A, 0x0003, 0x00FD, 0x008C, 0x0332, 0x01D5, 0x0055, 0x003E,
+    0x0001, 0x07E4, 0x0264, 0x00B2, 0x00A2, 0x005C, 0x0005, 0x02A2,
+    0x011D, 0x0132, 0x076C, 0x0012, 0x0018, 0x01E4, 0x05E4, 0x02B2,
+    0x0432, 0x017D, 0x000E, 0x055D, 0x0955, 0x0164, 0x0028, 0x0D62,
+    0x0B24, 0x02DE, 0x001E, 0x0340, 0x0014, 0x0555, 0x0180, 0x00DD,
+    0x01B2, 0x0092, 0x036C, 0x00EC, 0x00E4, 0x00C0, 0x0C64, 0x095D,
+    0x01DE, 0x0AE4, 0x0C32, 0x01A2, 0x06E4, 0x0832, 0x01A4, 0x015D,
+    0x0732, 0x031D, 0x0F9C, 0x03E2, 0x09E2, 0x02FD, 0x0224, 0x051D,
+    0x02E4, 0x019C, 0x05B2, 0x0355, 0x0064, 0x016C, 0x038C, 0x0880,
+    0x0480, 0x06B2, 0x0540, 0x0080, 0x075D, 0x0155, 0x0424, 0x0680,
+    0x0A62, 0x0A80, 0x078C, 0x0D9C, 0x0F8C, 0x0562, 0x0FF2, 0x0464,
+    0x0B55, 0x01E2, 0x0032, 0x07F2, 0x0140, 0x03E4, 0x0662, 0x0755,
+    0x0380, 0x026C, 0x0232, 0x001D, 0x0040, 0x00E2, 0x035D, 0x00F2,
+    0x0162, 0x01FD, 0x03F2, 0x000C, 0x0EA2, 0x05F2, 0x0072, 0x04E4,
+    0x0F32, 0x018C, 0x009D, 0x0324, 0x079C, 0x006C, 0x0054, 0x0F5D,
+    0x021D, 0x0015, 0x0024, 0x06A2, 0x009C, 0x0004, 0x0062, 0x056C,
+    0x0262, 0x0000, 0x002E, 0x01F2, 0x0124, 0x039C, 0x005E, 0x0010,
+    0x0724, 0x00A4, 0x00DE, 0x0362, 0x0052, 0x000D, 0x03B2, 0x007D,
+    0x05E2, 0x00D5, 0x005D, 0x0035, 0x0009, 0x099C, 0x0022, 0x002C,
+    0x003D, 0x0008, 0x0002, 0x0006, 0x0007,
+};
+
+static const uint8_t ac_vlc_desc2_bits[165] = {
+     6, 12, 12,  8,  7,  8,  6,  6,
+     4,  3, 10,  9, 11,  9,  9,  6,
+     4, 11, 10, 10, 10,  7,  5, 11,
+    11, 10, 11,  8,  5, 11, 11, 11,
+    12,  9,  6, 11, 12,  9,  6, 12,
+    12, 10,  7, 10,  7, 11, 10,  8,
+    11,  8, 11,  8, 11,  8, 12, 12,
+     9, 12, 12,  9, 11, 12,  9, 12,
+    12, 10, 12, 10, 12, 10, 10, 11,
+    12, 12, 11, 12, 11, 11, 11, 12,
+    11, 11, 11, 12, 12, 12, 11, 11,
+    12, 12, 12, 12, 12, 12, 12, 12,
+    12, 12, 12, 12, 11, 11, 11, 11,
+    10, 10, 10, 10,  9,  9, 11,  9,
+    11,  9, 11,  8, 12, 11,  8, 11,
+    12, 10,  8, 12, 12, 10,  7, 12,
+    10,  7, 11, 12,  9,  6, 10, 11,
+    12,  8,  6, 11, 10, 11,  8,  5,
+    11,  9, 10, 10,  7,  5, 10,  9,
+    11,  9,  9,  6,  4, 12,  8,  7,
+     8,  6,  6,  4,  3,
+};
+
+static const uint16_t ac_vlc_desc3_syms[162] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD6, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0,
+    0xFC6, 0xFC5, 0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB5, 0xFB3,
+    0xFB2, 0xFB1, 0xFB0, 0xFA5, 0xFA3, 0xFA1, 0xFA0, 0xF95,
+    0xF93, 0xF91, 0xF90, 0xF85, 0xF83, 0xF81, 0xF80, 0xF71,
+    0xF70, 0xF66, 0xF61, 0xF60, 0xF56, 0xF51, 0xF50, 0xF46,
+    0xF41, 0xF40, 0xF36, 0xF31, 0xF30, 0xF26, 0xF21, 0xF20,
+    0xF11, 0xF10, 0xF01, 0xF00, 0xEF3, 0xEF1, 0xEF0, 0xEE3,
+    0xEE1, 0xEE0, 0xED3, 0xED1, 0xED0, 0xEC1, 0xEC0, 0xEB1,
+    0xEB0, 0xEA0, 0xE90, 0xE80, 0xE70, 0x1E1, 0x1D1, 0x1D0,
+    0x1C1, 0x1B1, 0x1A1, 0x180, 0x170, 0x163, 0x160, 0x150,
+    0x140, 0x130, 0x123, 0x120, 0x113, 0x110, 0x100, 0x0F0,
+    0x0E0, 0x0D1, 0x0D0, 0x0C1, 0x0C0, 0x0B1, 0x0B0, 0x0A1,
+    0x0A0, 0x095, 0x091, 0x090, 0x085, 0x081, 0x080, 0x076,
+    0x075, 0x073, 0x071, 0x070, 0x066, 0x065, 0x063, 0x061,
+    0x060, 0x055, 0x053, 0x052, 0x051, 0x050, 0x045, 0x043,
+    0x042, 0x041, 0x040, 0x036, 0x035, 0x034, 0x033, 0x032,
+    0x031, 0x030, 0x026, 0x025, 0x024, 0x023, 0x022, 0x021,
+    0x020, 0x018, 0x017, 0x016, 0x015, 0x014, 0x013, 0x012,
+    0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc3_codes[162] = {
+    0x001D, 0x087C, 0x0AE8, 0x003A, 0x001C, 0x0008, 0x000C, 0x0032,
+    0x0006, 0x0003, 0x03A5, 0x01EC, 0x01A5, 0x0080, 0x0030, 0x0005,
+    0x0001, 0x0040, 0x03FC, 0x02D4, 0x0154, 0x02FC, 0x003C, 0x0015,
+    0x051A, 0x0000, 0x02EC, 0x077C, 0x00D2, 0x0018, 0x03E8, 0x04EC,
+    0x027C, 0x01FA, 0x0022, 0x0765, 0x0EA5, 0x0054, 0x0010, 0x08EC,
+    0x0AAC, 0x03BA, 0x0042, 0x065D, 0x0AD4, 0x005C, 0x0028, 0x03C0,
+    0x00E5, 0x035C, 0x04FA, 0x00DC, 0x06A5, 0x075C, 0x00C8, 0x05A5,
+    0x04D4, 0x00BA, 0x01C0, 0x05E8, 0x012C, 0x00E8, 0x01B0, 0x00B0,
+    0x025D, 0x002C, 0x0A52, 0x025C, 0x01E8, 0x00FA, 0x0348, 0x0652,
+    0x0B7C, 0x0365, 0x031A, 0x0E52, 0x011A, 0x0200, 0x01BA, 0x02AC,
+    0x06D4, 0x01FC, 0x05BA, 0x0DFC, 0x0248, 0x0EE8, 0x0B1A, 0x0CFC,
+    0x0F65, 0x0B5C, 0x0DC0, 0x007C, 0x0548, 0x08A5, 0x00FC, 0x03B0,
+    0x0148, 0x06AC, 0x0252, 0x071A, 0x02E8, 0x0240, 0x00AC, 0x021A,
+    0x0140, 0x08E8, 0x01AC, 0x00EC, 0x0152, 0x00A5, 0x0068, 0x001A,
+    0x006C, 0x05C0, 0x015C, 0x0025, 0x05B0, 0x017C, 0x0014, 0x047C,
+    0x00D4, 0x06E8, 0x00C0, 0x0002, 0x0A5D, 0x04E8, 0x0A7C, 0x01D4,
+    0x0020, 0x04A5, 0x07B0, 0x037C, 0x015D, 0x002A, 0x005D, 0x0048,
+    0x067C, 0x007A, 0x0004, 0x04FC, 0x02FA, 0x0648, 0x0100, 0x0052,
+    0x005A, 0x000D, 0x0165, 0x0065, 0x02A5, 0x0070, 0x00F0, 0x003D,
+    0x0009, 0x05FC, 0x0E48, 0x009A, 0x0012, 0x00DD, 0x0034, 0x000A,
+    0x000E, 0x0007,
+};
+
+static const uint8_t ac_vlc_desc3_bits[162] = {
+     7, 12, 12,  8,  7,  7,  6,  6,
+     4,  3, 10,  9, 11,  8,  8,  6,
+     4, 10, 10, 12,  9, 10,  7,  5,
+    11, 10, 10, 11,  8,  5, 10, 11,
+    12,  9,  6, 12, 12,  9,  6, 12,
+    12, 10,  7, 11, 12, 10,  7, 10,
+     8, 12, 11,  8, 12, 11,  8, 11,
+    11,  9, 11, 11,  9, 12, 11,  9,
+    12,  9, 12, 10, 11, 11, 10, 12,
+    12, 11, 12, 12, 11, 10, 11, 12,
+    11, 11, 11, 12, 11, 12, 12, 12,
+    12, 12, 12, 12, 11, 12, 11, 11,
+    11, 11, 12, 11, 12, 10, 10, 10,
+     9, 12,  9, 12,  9, 12,  8, 10,
+     8, 12, 10,  8, 11, 10,  7, 11,
+    11, 12,  9,  7, 12, 11, 12,  9,
+     6, 11, 11, 12,  9,  6, 10, 10,
+    11,  8,  5, 12, 10, 12,  9, 10,
+     7,  5, 10,  9, 11,  8,  8,  6,
+     4, 12, 12,  8,  7,  8,  6,  6,
+     4,  3,
+};
+
+static const uint16_t ac_vlc_desc4_syms[131] = {
+   0x1000, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2, 0xFF1, 0xFF0,
+    0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1, 0xFE0, 0xFD6,
+    0xFD5, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC5, 0xFC3, 0xFC2,
+    0xFC1, 0xFC0, 0xFB5, 0xFB3, 0xFB1, 0xFB0, 0xFA5, 0xFA3,
+    0xFA1, 0xFA0, 0xF93, 0xF91, 0xF90, 0xF81, 0xF80, 0xF76,
+    0xF71, 0xF70, 0xF66, 0xF61, 0xF60, 0xF56, 0xF51, 0xF50,
+    0xF41, 0xF40, 0xF31, 0xF30, 0xF23, 0xF21, 0xF20, 0xF13,
+    0xF11, 0xF10, 0xF03, 0xF01, 0xF00, 0xEF1, 0xEF0, 0xEE0,
+    0xED0, 0xEC0, 0xEB0, 0x191, 0x181, 0x180, 0x171, 0x161,
+    0x140, 0x130, 0x123, 0x120, 0x110, 0x100, 0x0F3, 0x0F0,
+    0x0E0, 0x0D0, 0x0C0, 0x0B1, 0x0B0, 0x0A1, 0x0A0, 0x091,
+    0x090, 0x085, 0x081, 0x080, 0x075, 0x071, 0x070, 0x066,
+    0x065, 0x063, 0x061, 0x060, 0x056, 0x055, 0x053, 0x051,
+    0x050, 0x045, 0x043, 0x042, 0x041, 0x040, 0x036, 0x035,
+    0x033, 0x032, 0x031, 0x030, 0x026, 0x025, 0x024, 0x023,
+    0x022, 0x021, 0x020, 0x018, 0x016, 0x015, 0x014, 0x013,
+    0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc4_codes[131] = {
+    0x006B, 0x00BE, 0x0052, 0x00F3, 0x005B, 0x003A, 0x0009, 0x0007,
+    0x00DA, 0x03FB, 0x0123, 0x00B3, 0x01B3, 0x002E, 0x0006, 0x030A,
+    0x005A, 0x004A, 0x034A, 0x0072, 0x0005, 0x02DA, 0x0173, 0x04FB,
+    0x0032, 0x0013, 0x039B, 0x0B9B, 0x011E, 0x0002, 0x00FB, 0x021E,
+    0x009B, 0x007E, 0x0E1A, 0x03CA, 0x007B, 0x02FB, 0x0033, 0x03AB,
+    0x0463, 0x008A, 0x0773, 0x041E, 0x002B, 0x031B, 0x065A, 0x011A,
+    0x060A, 0x01DA, 0x0963, 0x0323, 0x0BAB, 0x059E, 0x010A, 0x05AB,
+    0x0CFB, 0x071B, 0x079E, 0x0F9E, 0x0263, 0x079B, 0x0563, 0x019E,
+    0x01AB, 0x0E63, 0x029B, 0x04CA, 0x0DAB, 0x0663, 0x0B1B, 0x020A,
+    0x0A1E, 0x021A, 0x0063, 0x061E, 0x06FB, 0x025A, 0x0163, 0x0573,
+    0x000A, 0x0223, 0x011B, 0x0C1A, 0x015A, 0x0863, 0x00AB, 0x02CA,
+    0x00B2, 0x0A0A, 0x01CA, 0x00A3, 0x0B73, 0x0023, 0x0012, 0x039E,
+    0x001A, 0x0CCA, 0x01FB, 0x005E, 0x0A9B, 0x00CA, 0x0373, 0x009E,
+    0x0022, 0x07AB, 0x001E, 0x0EFB, 0x009A, 0x000B, 0x041A, 0x019B,
+    0x0363, 0x014A, 0x006A, 0x0015, 0x069B, 0x0073, 0x0523, 0x001B,
+    0x012B, 0x0003, 0x0001, 0x061A, 0x003E, 0x002A, 0x00E3, 0x003B,
+    0x000E, 0x000D, 0x0000,
+};
+
+static const uint8_t ac_vlc_desc4_bits[131] = {
+     7,  8,  7,  8,  7,  6,  4,  3,
+    10, 10, 11,  9,  9,  6,  4, 10,
+    10,  9, 10,  7,  5, 10, 11, 12,
+     8,  6, 12, 12,  9,  6, 11, 12,
+    10,  7, 12, 10,  8, 11,  8, 12,
+    11,  8, 11, 11,  9, 12, 11,  9,
+    11,  9, 12, 10, 12, 11, 10, 12,
+    12, 11, 12, 12, 11, 11, 11, 11,
+    11, 12, 12, 12, 12, 12, 12, 12,
+    12, 11, 12, 11, 12, 11, 12, 11,
+    10, 10, 10, 12,  9, 12,  9, 10,
+     8, 12, 10,  8, 12, 10,  7, 11,
+    11, 12, 10,  7, 12, 11, 12,  9,
+     6, 11, 11, 12,  8,  6, 12, 10,
+    10, 10,  7,  5, 11,  9, 11,  9,
+     9,  6,  4, 12,  8,  7,  8,  7,
+     6,  4,  2,
+};
+
+static const uint16_t ac_vlc_desc5_syms[132] = {
+   0x1000, 0xFF8, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2, 0xFF1,
+    0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1, 0xFE0,
+    0xFD6, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC5,
+    0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB5, 0xFB3, 0xFB1, 0xFB0,
+    0xFA3, 0xFA1, 0xFA0, 0xF96, 0xF93, 0xF91, 0xF90, 0xF86,
+    0xF85, 0xF81, 0xF80, 0xF76, 0xF75, 0xF71, 0xF70, 0xF66,
+    0xF61, 0xF60, 0xF51, 0xF50, 0xF43, 0xF41, 0xF40, 0xF33,
+    0xF31, 0xF30, 0xF23, 0xF21, 0xF20, 0xF11, 0xF10, 0xF00,
+    0xEF0, 0xEE0, 0xEC1, 0xEC0, 0x151, 0x141, 0x140, 0x131,
+    0x121, 0x120, 0x111, 0x110, 0x103, 0x100, 0x0F0, 0x0E0,
+    0x0D3, 0x0D0, 0x0C3, 0x0C1, 0x0C0, 0x0B1, 0x0B0, 0x0A1,
+    0x0A0, 0x091, 0x090, 0x081, 0x080, 0x075, 0x071, 0x070,
+    0x065, 0x061, 0x060, 0x056, 0x055, 0x053, 0x052, 0x051,
+    0x050, 0x046, 0x045, 0x043, 0x042, 0x041, 0x040, 0x035,
+    0x034, 0x033, 0x032, 0x031, 0x030, 0x026, 0x025, 0x024,
+    0x023, 0x022, 0x021, 0x020, 0x018, 0x016, 0x015, 0x014,
+    0x013, 0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc5_codes[132] = {
+    0x0001, 0x0D62, 0x00BD, 0x0022, 0x009B, 0x0032, 0x0019, 0x0005,
+    0x0007, 0x034D, 0x009A, 0x012B, 0x0052, 0x006B, 0x003A, 0x0006,
+    0x06FD, 0x017D, 0x081A, 0x031B, 0x031A, 0x0012, 0x0011, 0x0202,
+    0x00FD, 0x051B, 0x00D2, 0x001D, 0x011A, 0x0782, 0x018D, 0x007B,
+    0x067D, 0x037D, 0x0021, 0x0E8D, 0x0562, 0x008D, 0x00BB, 0x053D,
+    0x082A, 0x0002, 0x000D, 0x0302, 0x007D, 0x053B, 0x003B, 0x0A4D,
+    0x027D, 0x01FD, 0x042A, 0x01C2, 0x041A, 0x0182, 0x014D, 0x0162,
+    0x00C2, 0x032A, 0x0D9A, 0x012A, 0x0102, 0x087D, 0x072B, 0x039A,
+    0x0362, 0x019A, 0x0C62, 0x04C2, 0x0D1B, 0x028D, 0x0762, 0x0E7D,
+    0x0E41, 0x059A, 0x024D, 0x093B, 0x052B, 0x011B, 0x064D, 0x013D,
+    0x0382, 0x0262, 0x0641, 0x0462, 0x004D, 0x0CC2, 0x033B, 0x068D,
+    0x0141, 0x0D2B, 0x001B, 0x0041, 0x00C1, 0x0C41, 0x01E2, 0x00EB,
+    0x062A, 0x0082, 0x0061, 0x02FD, 0x047D, 0x013B, 0x002A, 0x003D,
+    0x005B, 0x022A, 0x02C2, 0x0241, 0x0062, 0x00AA, 0x000B, 0x00E2,
+    0x001A, 0x033D, 0x021A, 0x006A, 0x0009, 0x032B, 0x002B, 0x04FD,
+    0x0042, 0x016B, 0x002D, 0x000E, 0x0441, 0x00CD, 0x005A, 0x00AB,
+    0x000A, 0x0039, 0x0003, 0x0000,
+};
+
+static const uint8_t ac_vlc_desc5_bits[132] = {
+     7, 12,  8,  7,  8,  6,  6,  4,
+     3, 10,  9, 11,  8,  9,  6,  4,
+    11, 10, 12, 10, 10,  7,  5, 10,
+    11, 12,  8,  6, 10, 11,  9,  7,
+    12, 10,  7, 12, 12, 10,  8, 11,
+    12, 10,  8, 10, 12, 11,  9, 12,
+    11,  9, 11,  9, 11, 10, 10, 11,
+    11, 10, 12, 10, 10, 12, 11, 10,
+    11, 11, 12, 12, 12, 11, 11, 12,
+    12, 12, 12, 12, 12, 11, 11, 11,
+    11, 10, 12, 12, 10, 12, 10, 12,
+     9, 12,  9, 11,  8, 12,  9,  8,
+    11,  9,  7, 11, 11, 12, 12,  9,
+     7, 11, 10, 11, 11,  8,  6,  9,
+    12, 10, 10,  7,  5, 11,  9, 11,
+     8,  9,  6,  4, 12,  8,  7,  8,
+     6,  6,  4,  2,
+};
+
+static const uint16_t ac_vlc_desc6_syms[130] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD6, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0,
+    0xFC5, 0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB5, 0xFB3, 0xFB1,
+    0xFB0, 0xFA6, 0xFA3, 0xFA1, 0xFA0, 0xF96, 0xF95, 0xF93,
+    0xF91, 0xF90, 0xF86, 0xF85, 0xF81, 0xF80, 0xF76, 0xF71,
+    0xF70, 0xF63, 0xF61, 0xF60, 0xF53, 0xF51, 0xF50, 0xF43,
+    0xF41, 0xF40, 0xF31, 0xF30, 0xF20, 0xF10, 0xF00, 0xEF0,
+    0xEE1, 0x131, 0x121, 0x120, 0x111, 0x110, 0x101, 0x100,
+    0x0F1, 0x0F0, 0x0E3, 0x0E1, 0x0E0, 0x0D1, 0x0D0, 0x0C3,
+    0x0C0, 0x0B3, 0x0B1, 0x0B0, 0x0A1, 0x0A0, 0x091, 0x090,
+    0x081, 0x080, 0x075, 0x071, 0x070, 0x065, 0x063, 0x061,
+    0x060, 0x056, 0x055, 0x053, 0x051, 0x050, 0x046, 0x045,
+    0x043, 0x042, 0x041, 0x040, 0x036, 0x035, 0x034, 0x033,
+    0x032, 0x031, 0x030, 0x026, 0x025, 0x024, 0x023, 0x022,
+    0x021, 0x020, 0x018, 0x016, 0x015, 0x014, 0x013, 0x012,
+    0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc6_codes[130] = {
+    0x0022, 0x0BB2, 0x0942, 0x002B, 0x0072, 0x0002, 0x001A, 0x0039,
+    0x000D, 0x0007, 0x007B, 0x008E, 0x06DB, 0x00EA, 0x015B, 0x002E,
+    0x0006, 0x0959, 0x027B, 0x0A0E, 0x01AB, 0x008A, 0x0012, 0x001E,
+    0x0575, 0x005B, 0x02AB, 0x00C2, 0x0015, 0x036A, 0x04B2, 0x0099,
+    0x001B, 0x0519, 0x0C19, 0x00DB, 0x004E, 0x0042, 0x0159, 0x03B2,
+    0x030E, 0x00EB, 0x0252, 0x0EAB, 0x018A, 0x00E2, 0x06AB, 0x0242,
+    0x017B, 0x0452, 0x0319, 0x0152, 0x025B, 0x016A, 0x00AB, 0x0052,
+    0x05B2, 0x010E, 0x038E, 0x028A, 0x0359, 0x0019, 0x078A, 0x0C52,
+    0x0D8E, 0x0ED9, 0x02D9, 0x0662, 0x0119, 0x09B2, 0x0BAB, 0x0D19,
+    0x0C5B, 0x00B2, 0x0542, 0x0B8A, 0x02B2, 0x0142, 0x065B, 0x058E,
+    0x0062, 0x018E, 0x038A, 0x00D9, 0x0419, 0x0162, 0x03AB, 0x0075,
+    0x07B2, 0x0032, 0x020E, 0x07AB, 0x006B, 0x045B, 0x01B2, 0x0199,
+    0x002A, 0x0375, 0x0775, 0x0AAB, 0x01D9, 0x003B, 0x060E, 0x0342,
+    0x0175, 0x0262, 0x000A, 0x0005, 0x0559, 0x006A, 0x0D59, 0x0219,
+    0x000E, 0x004A, 0x0009, 0x0719, 0x0059, 0x02DB, 0x00D2, 0x01DB,
+    0x0025, 0x0001, 0x06D9, 0x00F5, 0x0035, 0x00FB, 0x003A, 0x000B,
+    0x0003, 0x0000,
+};
+
+static const uint8_t ac_vlc_desc6_bits[130] = {
+     7, 12, 12,  8,  7,  7,  6,  6,
+     4,  3, 10,  9, 11,  8,  9,  6,
+     4, 12, 10, 12, 10, 10,  7,  5,
+    11, 11, 12,  8,  6, 10, 11,  9,
+     7, 12, 12, 10,  7, 10, 12, 12,
+    10,  8, 10, 12, 10,  8, 12, 10,
+     9, 12, 11,  9, 11, 10, 10, 11,
+    11, 10, 10, 10, 10, 11, 11, 12,
+    12, 12, 11, 11, 11, 12, 12, 12,
+    12, 11, 11, 12, 10, 12, 11, 12,
+    10, 11, 12, 10, 12,  9, 12,  9,
+    11,  8, 12, 11,  8, 12, 12,  9,
+     7, 11, 11, 12,  9,  7, 11, 10,
+    11, 11,  8,  6, 12,  9, 12, 10,
+    10,  7,  5, 11,  9, 11,  8,  9,
+     6,  4, 12,  8,  7,  8,  6,  6,
+     4,  2,
+};
+
+static const uint16_t ac_vlc_desc7_syms[125] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC5,
+    0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB5, 0xFB3, 0xFB1, 0xFB0,
+    0xFA6, 0xFA5, 0xFA3, 0xFA1, 0xFA0, 0xF96, 0xF95, 0xF93,
+    0xF91, 0xF90, 0xF86, 0xF81, 0xF80, 0xF73, 0xF71, 0xF70,
+    0xF63, 0xF61, 0xF60, 0xF53, 0xF51, 0xF50, 0xF41, 0xF40,
+    0xF31, 0xF30, 0xF20, 0xF10, 0xF01, 0xF00, 0x121, 0x111,
+    0x101, 0x100, 0x0F1, 0x0F0, 0x0E1, 0x0E0, 0x0D1, 0x0D0,
+    0x0C3, 0x0C1, 0x0C0, 0x0B1, 0x0B0, 0x0A3, 0x0A1, 0x0A0,
+    0x093, 0x091, 0x090, 0x081, 0x080, 0x071, 0x070, 0x065,
+    0x063, 0x061, 0x060, 0x055, 0x053, 0x052, 0x051, 0x050,
+    0x046, 0x045, 0x043, 0x042, 0x041, 0x040, 0x036, 0x035,
+    0x034, 0x033, 0x032, 0x031, 0x030, 0x026, 0x025, 0x024,
+    0x023, 0x022, 0x021, 0x020, 0x018, 0x017, 0x016, 0x015,
+    0x014, 0x013, 0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc7_codes[125] = {
+    0x0053, 0x009A, 0x0EE2, 0x00D3, 0x006A, 0x0052, 0x003A, 0x0035,
+    0x000D, 0x0007, 0x0062, 0x0125, 0x0142, 0x0019, 0x01F3, 0x0029,
+    0x000E, 0x0082, 0x0ADA, 0x02E3, 0x00E2, 0x0022, 0x0006, 0x0065,
+    0x05E3, 0x0765, 0x0032, 0x0039, 0x0F99, 0x05E2, 0x0099, 0x0033,
+    0x0362, 0x0799, 0x0F65, 0x0073, 0x004A, 0x02A5, 0x0162, 0x0742,
+    0x01A5, 0x00D9, 0x0342, 0x005A, 0x00AA, 0x0EF3, 0x0182, 0x01DA,
+    0x0382, 0x035A, 0x00F3, 0x0673, 0x0165, 0x00E5, 0x06F3, 0x0225,
+    0x0842, 0x025A, 0x07E3, 0x0399, 0x07A5, 0x072A, 0x0F2A, 0x09E3,
+    0x0273, 0x049A, 0x02E5, 0x0B99, 0x02E2, 0x0E73, 0x0562, 0x02F3,
+    0x032A, 0x0F42, 0x00DA, 0x0999, 0x012A, 0x0365, 0x00A5, 0x00E3,
+    0x0199, 0x03E3, 0x019A, 0x01E2, 0x0173, 0x06E5, 0x0059, 0x01E3,
+    0x02DA, 0x002A, 0x000A, 0x06DA, 0x0FA5, 0x0042, 0x01E5, 0x0013,
+    0x03E2, 0x015A, 0x03A5, 0x0442, 0x001A, 0x0005, 0x04A5, 0x0265,
+    0x08A5, 0x0025, 0x029A, 0x0072, 0x0016, 0x0599, 0x00C2, 0x0242,
+    0x00B2, 0x0002, 0x0015, 0x0001, 0x0BE3, 0x06E2, 0x0063, 0x0023,
+    0x0012, 0x0009, 0x0003, 0x000B, 0x0000,
+};
+
+static const uint8_t ac_vlc_desc7_bits[125] = {
+     8, 11, 12,  8,  7,  7,  6,  6,
+     4,  3,  9,  9, 10,  8,  9,  6,
+     4,  9, 12, 10, 10,  7,  5, 10,
+    11, 12,  8,  6, 12, 11,  9,  7,
+    10, 12, 12, 10,  7, 10, 11, 12,
+    10,  8, 11, 10,  8, 12, 10,  9,
+    10, 10, 10, 12, 10, 10, 12, 10,
+    12, 10, 11, 12, 12, 12, 12, 12,
+    11, 11, 11, 12, 11, 12, 11, 11,
+    11, 12, 10, 12, 10, 11, 12, 10,
+    12, 12,  9, 11,  9, 11,  8, 12,
+    12,  9,  7, 11, 12, 12,  9,  7,
+    10, 10, 11, 11,  8,  6, 11, 10,
+    12, 10, 10,  7,  5, 11,  8, 10,
+     8,  8,  6,  4, 12, 12,  8,  7,
+     7,  6,  6,  4,  2,
+};
+
+static const uint16_t ac_vlc_desc8_syms[121] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC5,
+    0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB6, 0xFB5, 0xFB3, 0xFB1,
+    0xFB0, 0xFA6, 0xFA5, 0xFA3, 0xFA1, 0xFA0, 0xF96, 0xF95,
+    0xF93, 0xF91, 0xF90, 0xF86, 0xF83, 0xF81, 0xF80, 0xF73,
+    0xF71, 0xF70, 0xF63, 0xF61, 0xF60, 0xF51, 0xF50, 0xF41,
+    0xF40, 0xF30, 0xF21, 0xF20, 0x111, 0x101, 0x0F1, 0x0E1,
+    0x0E0, 0x0D1, 0x0D0, 0x0C1, 0x0C0, 0x0B3, 0x0B1, 0x0B0,
+    0x0A3, 0x0A1, 0x0A0, 0x093, 0x091, 0x090, 0x083, 0x081,
+    0x080, 0x073, 0x071, 0x070, 0x065, 0x063, 0x061, 0x060,
+    0x055, 0x053, 0x051, 0x050, 0x046, 0x045, 0x043, 0x042,
+    0x041, 0x040, 0x036, 0x035, 0x034, 0x033, 0x032, 0x031,
+    0x030, 0x026, 0x025, 0x024, 0x023, 0x022, 0x021, 0x020,
+    0x018, 0x017, 0x016, 0x015, 0x014, 0x013, 0x012, 0x011,
+    0x010,
+};
+
+static const uint16_t ac_vlc_desc8_codes[121] = {
+    0x00F6, 0x0676, 0x0EB6, 0x00F3, 0x0056, 0x006A, 0x0039, 0x0003,
+    0x000D, 0x0007, 0x00A2, 0x0173, 0x00CA, 0x0025, 0x0082, 0x0019,
+    0x0001, 0x00B6, 0x0276, 0x02E3, 0x00B2, 0x0062, 0x001A, 0x0175,
+    0x01E3, 0x0BE5, 0x004A, 0x0029, 0x07A5, 0x00E3, 0x030A, 0x0176,
+    0x0023, 0x0042, 0x05CA, 0x00A5, 0x0142, 0x0052, 0x04A5, 0x0B02,
+    0x0D22, 0x0375, 0x0065, 0x0522, 0x0DE3, 0x010A, 0x00F5, 0x0136,
+    0x0275, 0x01B2, 0x03F5, 0x03E3, 0x0002, 0x08E3, 0x01A2, 0x0B36,
+    0x020A, 0x0076, 0x0CE3, 0x07E5, 0x070A, 0x03A5, 0x02B6, 0x0036,
+    0x01E5, 0x02A5, 0x05E3, 0x07B6, 0x07F5, 0x0736, 0x0BA5, 0x0075,
+    0x0302, 0x0FE5, 0x01B6, 0x0102, 0x04E3, 0x0022, 0x08A5, 0x01CA,
+    0x00E5, 0x0F0A, 0x05E5, 0x0096, 0x0A76, 0x0336, 0x0236, 0x0012,
+    0x03B6, 0x0BF5, 0x0073, 0x0035, 0x02B2, 0x000A, 0x0476, 0x0122,
+    0x0016, 0x0009, 0x0322, 0x01F5, 0x03E5, 0x01A5, 0x03CA, 0x0072,
+    0x0006, 0x06A5, 0x0032, 0x02CA, 0x008A, 0x00C2, 0x0015, 0x000E,
+    0x0702, 0x06B6, 0x0063, 0x0033, 0x002A, 0x0005, 0x0013, 0x000B,
+    0x0000,
+};
+
+static const uint8_t ac_vlc_desc8_bits[121] = {
+     8, 11, 12,  8,  7,  7,  6,  6,
+     4,  3,  9,  9, 10,  8,  8,  6,
+     4, 10, 12, 10, 10,  7,  5, 10,
+    11, 12,  8,  6, 11, 12, 11,  9,
+     7,  9, 11, 12,  9,  7, 11, 12,
+    12, 10,  8, 12, 12, 10,  9, 10,
+    10,  9, 12, 10,  9, 12,  9, 12,
+    10, 11, 12, 12, 12, 12, 11, 10,
+    11, 11, 12, 11, 11, 11, 12, 10,
+    12, 12, 10, 10, 12,  9, 12, 11,
+     9, 12, 11,  8, 12, 12, 10,  7,
+    11, 12,  9,  7, 10, 10, 11, 11,
+     8,  6, 10, 10, 12, 10, 10,  7,
+     5, 11,  8, 10,  8,  8,  6,  4,
+    11, 12,  8,  7,  7,  6,  6,  4,
+     2,
+};
+
+static const uint16_t ac_vlc_desc9_syms[114] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC5,
+    0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB6, 0xFB5, 0xFB3, 0xFB2,
+    0xFB1, 0xFB0, 0xFA6, 0xFA5, 0xFA3, 0xFA1, 0xFA0, 0xF96,
+    0xF93, 0xF91, 0xF90, 0xF83, 0xF81, 0xF80, 0xF73, 0xF71,
+    0xF70, 0xF61, 0xF60, 0xF51, 0xF50, 0xF40, 0xF31, 0xF30,
+    0xF21, 0x121, 0x0F1, 0x0E1, 0x0D1, 0x0D0, 0x0C1, 0x0C0,
+    0x0B1, 0x0B0, 0x0A3, 0x0A1, 0x0A0, 0x093, 0x091, 0x090,
+    0x083, 0x081, 0x080, 0x073, 0x071, 0x070, 0x065, 0x063,
+    0x061, 0x060, 0x055, 0x053, 0x051, 0x050, 0x045, 0x043,
+    0x042, 0x041, 0x040, 0x036, 0x035, 0x034, 0x033, 0x032,
+    0x031, 0x030, 0x026, 0x025, 0x024, 0x023, 0x022, 0x021,
+    0x020, 0x018, 0x017, 0x016, 0x015, 0x014, 0x013, 0x012,
+    0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_desc9_codes[114] = {
+    0x0061, 0x0403, 0x0DB1, 0x0012, 0x0071, 0x0056, 0x0035, 0x0023,
+    0x000D, 0x0007, 0x0243, 0x01D3, 0x026A, 0x00A1, 0x00A2, 0x0011,
+    0x000E, 0x01AA, 0x0531, 0x0093, 0x0222, 0x0032, 0x0006, 0x07F2,
+    0x04D3, 0x0C43, 0x0072, 0x0001, 0x0343, 0x05F2, 0x04AA, 0x03F2,
+    0x0031, 0x0045, 0x0143, 0x00AA, 0x0B31, 0x00F2, 0x00C3, 0x0693,
+    0x0BF2, 0x0203, 0x00E1, 0x03B1, 0x02D3, 0x00B1, 0x056A, 0x01D2,
+    0x008A, 0x046A, 0x01E2, 0x0003, 0x0103, 0x01B1, 0x02E2, 0x0293,
+    0x016A, 0x04E2, 0x0443, 0x0521, 0x0321, 0x0043, 0x00D3, 0x00E2,
+    0x0703, 0x00D2, 0x0731, 0x0A93, 0x0393, 0x0803, 0x0422, 0x0383,
+    0x018A, 0x006A, 0x0021, 0x096A, 0x0303, 0x0052, 0x0CE2, 0x0D31,
+    0x038A, 0x0013, 0x01F2, 0x0E93, 0x0083, 0x0005, 0x02D2, 0x0121,
+    0x0022, 0x00EA, 0x0036, 0x0122, 0x0193, 0x0331, 0x0183, 0x02AA,
+    0x004A, 0x001A, 0x0131, 0x002A, 0x036A, 0x000A, 0x0062, 0x0025,
+    0x0009, 0x06E2, 0x05B1, 0x0053, 0x0002, 0x0016, 0x0015, 0x0033,
+    0x000B, 0x0000,
+};
+
+static const uint8_t ac_vlc_desc9_bits[114] = {
+     8, 11, 12,  7,  7,  7,  6,  6,
+     4,  3, 10,  9, 10,  8,  8,  6,
+     4,  9, 12, 10, 10,  7,  5, 11,
+    11, 12,  8,  6, 10, 11, 11, 12,
+     9,  7, 10, 11, 12,  9,  8, 12,
+    12, 10,  8, 10, 10,  9, 11,  9,
+     9, 11,  9, 12, 10, 11, 11, 12,
+    12, 12, 12, 11, 10, 11, 11, 11,
+    11, 10, 11, 12, 10, 12, 11, 10,
+    10, 11,  9, 12, 11,  8, 12, 12,
+    10,  8, 11, 12,  9,  7, 10, 11,
+    11,  8,  6,  9, 10, 12, 10, 10,
+     7,  5, 11,  8, 10,  8,  8,  6,
+     4, 11, 12,  8,  6,  7,  6,  6,
+     4,  2,
+};
+
+static const uint16_t ac_vlc_descA_syms[110] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC6,
+    0xFC5, 0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB6, 0xFB5, 0xFB3,
+    0xFB2, 0xFB1, 0xFB0, 0xFA6, 0xFA5, 0xFA3, 0xFA1, 0xFA0,
+    0xF96, 0xF93, 0xF91, 0xF90, 0xF83, 0xF81, 0xF80, 0xF73,
+    0xF71, 0xF70, 0xF61, 0xF60, 0xF51, 0xF50, 0xF41, 0xF40,
+    0xF31, 0x0E1, 0x0D1, 0x0C1, 0x0C0, 0x0B1, 0x0B0, 0x0A1,
+    0x0A0, 0x093, 0x091, 0x090, 0x083, 0x081, 0x080, 0x073,
+    0x071, 0x070, 0x063, 0x061, 0x060, 0x055, 0x053, 0x051,
+    0x050, 0x045, 0x044, 0x043, 0x042, 0x041, 0x040, 0x036,
+    0x035, 0x034, 0x033, 0x032, 0x031, 0x030, 0x026, 0x025,
+    0x024, 0x023, 0x022, 0x021, 0x020, 0x018, 0x017, 0x016,
+    0x015, 0x014, 0x013, 0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_descA_codes[110] = {
+    0x002A, 0x04C5, 0x02A3, 0x004A, 0x0015, 0x0005, 0x0003, 0x0013,
+    0x000D, 0x0007, 0x0171, 0x0032, 0x0371, 0x0076, 0x0042, 0x0011,
+    0x000E, 0x00AA, 0x04D5, 0x03A3, 0x06A3, 0x0062, 0x001A, 0x06D5,
+    0x07F2, 0x0223, 0x0CD5, 0x006A, 0x0001, 0x00F6, 0x0623, 0x03F2,
+    0x07EA, 0x01F1, 0x0021, 0x03D5, 0x08C2, 0x07F6, 0x00F2, 0x00E3,
+    0x0FEA, 0x02C5, 0x01AA, 0x0082, 0x04A3, 0x00B6, 0x0071, 0x03B2,
+    0x0023, 0x01B6, 0x08A3, 0x0002, 0x0BB2, 0x00C5, 0x02EA, 0x0C23,
+    0x0FF6, 0x0423, 0x07B2, 0x01C5, 0x07D5, 0x01EA, 0x06EA, 0x02C2,
+    0x01F6, 0x01D5, 0x01B2, 0x00B2, 0x04F1, 0x03EA, 0x01A2, 0x02A2,
+    0x02D5, 0x0123, 0x00D5, 0x01F2, 0x0055, 0x05B2, 0x04C2, 0x0102,
+    0x0061, 0x05D5, 0x00C2, 0x00F1, 0x00A3, 0x0045, 0x0016, 0x01A3,
+    0x01C2, 0x08D5, 0x03C5, 0x00EA, 0x000A, 0x0006, 0x00A2, 0x0036,
+    0x02F1, 0x0072, 0x0022, 0x0025, 0x0009, 0x03F6, 0x0AA3, 0x0063,
+    0x0012, 0x0031, 0x0035, 0x0033, 0x000B, 0x0000,
+};
+
+static const uint8_t ac_vlc_descA_bits[110] = {
+     8, 11, 12,  7,  7,  7,  6,  6,
+     4,  3, 10,  8, 10,  8,  8,  6,
+     4,  9, 12, 10, 11,  7,  5, 11,
+    11, 11, 12,  8,  6,  9, 11, 11,
+    12,  9,  7, 11, 12, 12,  9,  8,
+    12, 10,  9,  8, 11,  9,  9, 12,
+    11,  9, 12,  9, 12, 11, 11, 12,
+    12, 12, 11, 10, 11, 10, 11, 10,
+    10, 11, 11,  9, 11, 11,  9, 10,
+    11,  9, 12, 10,  8, 11, 11,  9,
+     7, 11, 12, 11, 12,  8,  6, 10,
+     9, 12, 10, 10,  7,  5, 10,  8,
+    10,  8,  8,  6,  4, 11, 12,  8,
+     6,  7,  6,  6,  4,  2,
+};
+
+static const uint16_t ac_vlc_descB_syms[101] = {
+   0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC6,
+    0xFC5, 0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB6, 0xFB5, 0xFB3,
+    0xFB1, 0xFB0, 0xFA6, 0xFA3, 0xFA1, 0xFA0, 0xF93, 0xF91,
+    0xF90, 0xF83, 0xF81, 0xF80, 0xF71, 0xF70, 0xF61, 0xF60,
+    0xF51, 0xF50, 0xF41, 0x0F1, 0x0D1, 0x0C1, 0x0B1, 0x0B0,
+    0x0A1, 0x0A0, 0x091, 0x090, 0x083, 0x081, 0x080, 0x073,
+    0x071, 0x070, 0x063, 0x061, 0x060, 0x055, 0x053, 0x051,
+    0x050, 0x045, 0x043, 0x042, 0x041, 0x040, 0x036, 0x035,
+    0x034, 0x033, 0x032, 0x031, 0x030, 0x026, 0x025, 0x024,
+    0x023, 0x022, 0x021, 0x020, 0x018, 0x017, 0x016, 0x015,
+    0x014, 0x013, 0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_descB_codes[101] = {
+    0x00EE, 0x03A5, 0x0B73, 0x004E, 0x0035, 0x0015, 0x0023, 0x0013,
+    0x000D, 0x0007, 0x0673, 0x01F3, 0x02FE, 0x0096, 0x0133, 0x001E,
+    0x0001, 0x0116, 0x00F5, 0x03F5, 0x0473, 0x0052, 0x001A, 0x01D5,
+    0x0025, 0x0073, 0x0633, 0x0086, 0x0036, 0x012E, 0x0155, 0x0006,
+    0x0055, 0x000E, 0x0106, 0x023E, 0x0192, 0x0075, 0x0173, 0x01AE,
+    0x00D5, 0x08F5, 0x002E, 0x01FE, 0x0406, 0x00AE, 0x0E3E, 0x0206,
+    0x013E, 0x0373, 0x0D55, 0x063E, 0x0E33, 0x033E, 0x01F5, 0x0273,
+    0x003E, 0x06A5, 0x0092, 0x03D5, 0x04F5, 0x053E, 0x0016, 0x00FE,
+    0x07A5, 0x0125, 0x0506, 0x0292, 0x00BE, 0x0425, 0x0F73, 0x02F5,
+    0x0056, 0x0233, 0x02A5, 0x0C25, 0x007E, 0x0026, 0x0355, 0x0033,
+    0x0555, 0x01A5, 0x0306, 0x0046, 0x000A, 0x0225, 0x006E, 0x00A5,
+    0x0012, 0x00F3, 0x0005, 0x0009, 0x073E, 0x0773, 0x00B3, 0x0032,
+    0x0065, 0x0003, 0x0002, 0x000B, 0x0000,
+};
+
+static const uint8_t ac_vlc_descB_bits[101] = {
+     8, 11, 12,  7,  7,  7,  6,  6,
+     4,  3, 11,  9, 10,  8,  9,  6,
+     4,  9, 12, 10, 11,  7,  5, 10,
+    11, 11, 12,  8,  6,  9, 11, 11,
+     9,  7, 11, 11,  9,  8, 10,  9,
+     9, 12,  9,  9, 11,  9, 12, 10,
+    11, 12, 12, 12, 12, 11, 10, 11,
+    10, 11, 10, 10, 11, 11,  9, 10,
+    11,  9, 11, 10,  8, 12, 12, 10,
+     7, 11, 11, 12,  8,  6, 10, 10,
+    12, 10, 10,  7,  5, 10,  8, 10,
+     8,  9,  6,  4, 11, 12,  8,  6,
+     7,  6,  5,  4,  2,
+};
+
+static const uint16_t ac_vlc_descC_syms[96] = {
+    0x1000, 0xFF8, 0xFF7, 0xFF6, 0xFF5, 0xFF4, 0xFF3, 0xFF2,
+    0xFF1, 0xFF0, 0xFE6, 0xFE5, 0xFE4, 0xFE3, 0xFE2, 0xFE1,
+    0xFE0, 0xFD5, 0xFD4, 0xFD3, 0xFD2, 0xFD1, 0xFD0, 0xFC6,
+    0xFC5, 0xFC3, 0xFC2, 0xFC1, 0xFC0, 0xFB6, 0xFB5, 0xFB3,
+    0xFB1, 0xFB0, 0xFA6, 0xFA3, 0xFA1, 0xFA0, 0xF93, 0xF91,
+    0xF90, 0xF81, 0xF80, 0xF71, 0xF70, 0xF61, 0xF60, 0xF51,
+    0x0E1, 0x0C1, 0x0B1, 0x0A1, 0x0A0, 0x091, 0x090, 0x083,
+    0x081, 0x080, 0x073, 0x071, 0x070, 0x063, 0x061, 0x060,
+    0x055, 0x053, 0x051, 0x050, 0x045, 0x043, 0x042, 0x041,
+    0x040, 0x036, 0x035, 0x034, 0x033, 0x032, 0x031, 0x030,
+    0x026, 0x025, 0x024, 0x023, 0x022, 0x021, 0x020, 0x018,
+    0x017, 0x016, 0x015, 0x014, 0x013, 0x012, 0x011, 0x010,
+};
+
+static const uint16_t ac_vlc_descC_codes[96] = {
+    0x00DE, 0x072E, 0x0576, 0x006E, 0x0075, 0x0055, 0x0013, 0x0033,
+    0x000D, 0x0007, 0x07D2, 0x0052, 0x0065, 0x00CE, 0x0183, 0x003E,
+    0x0001, 0x002E, 0x0F35, 0x0003, 0x0243, 0x001A, 0x0006, 0x01A5,
+    0x0043, 0x0012, 0x0E43, 0x00B6, 0x0016, 0x0135, 0x0176, 0x0643,
+    0x0035, 0x001E, 0x0735, 0x0283, 0x0125, 0x00AE, 0x00D2, 0x0165,
+    0x0103, 0x0603, 0x00E5, 0x0C43, 0x02B5, 0x04A5, 0x00A5, 0x0443,
+    0x0265, 0x0476, 0x0212, 0x0112, 0x0376, 0x012E, 0x02D2, 0x0083,
+    0x0483, 0x015E, 0x06A5, 0x0335, 0x005E, 0x0025, 0x01D2, 0x00F6,
+    0x03D2, 0x032E, 0x03B5, 0x005A, 0x0203, 0x02A5, 0x0BD2, 0x004E,
+    0x0032, 0x01B5, 0x00B5, 0x0A65, 0x0225, 0x0276, 0x000E, 0x000A,
+    0x03E5, 0x0143, 0x01E5, 0x0036, 0x0092, 0x0005, 0x0009, 0x0665,
+    0x0076, 0x00C3, 0x003A, 0x0015, 0x0023, 0x0002, 0x000B, 0x0000,
+};
+
+static const uint8_t ac_vlc_descC_bits[96] = {
+     8, 11, 11,  7,  7,  7,  6,  6,
+     4,  3, 11,  8, 10,  8,  9,  6,
+     4,  9, 12, 10, 11,  7,  5,  9,
+    11, 10, 12,  8,  6, 10, 11, 12,
+     9,  7, 12, 10,  9,  8, 10,  9,
+     9, 11,  9, 12, 10, 11, 11, 12,
+    12, 11, 10,  9, 10, 10, 10, 11,
+    11,  9, 11, 11,  9, 10, 10,  8,
+    12, 11, 10,  7, 11, 11, 12,  8,
+     6, 10, 10, 12, 10, 10,  7,  5,
+    10,  9, 10,  8,  8,  6,  4, 11,
+    11,  8,  6,  7,  6,  5,  4,  2,
+};
+
+static const int tscc2_ac_vlc_sizes[NUM_VLC_SETS] = {
+    172, 169, 165, 162, 131, 132, 130, 125, 121, 114, 110, 101, 96
+};
+
+static const uint16_t *tscc2_ac_vlc_syms[NUM_VLC_SETS] = {
+    ac_vlc_desc0_syms, ac_vlc_desc1_syms, ac_vlc_desc2_syms, ac_vlc_desc3_syms,
+    ac_vlc_desc4_syms, ac_vlc_desc5_syms, ac_vlc_desc6_syms, ac_vlc_desc7_syms,
+    ac_vlc_desc8_syms, ac_vlc_desc9_syms, ac_vlc_descA_syms, ac_vlc_descB_syms,
+    ac_vlc_descC_syms,
+};
+
+static const uint16_t *tscc2_ac_vlc_codes[NUM_VLC_SETS] = {
+    ac_vlc_desc0_codes, ac_vlc_desc1_codes, ac_vlc_desc2_codes,
+    ac_vlc_desc3_codes, ac_vlc_desc4_codes, ac_vlc_desc5_codes,
+    ac_vlc_desc6_codes, ac_vlc_desc7_codes, ac_vlc_desc8_codes,
+    ac_vlc_desc9_codes, ac_vlc_descA_codes, ac_vlc_descB_codes,
+    ac_vlc_descC_codes,
+};
+
+static const uint8_t *tscc2_ac_vlc_bits[NUM_VLC_SETS] = {
+    ac_vlc_desc0_bits, ac_vlc_desc1_bits, ac_vlc_desc2_bits, ac_vlc_desc3_bits,
+    ac_vlc_desc4_bits, ac_vlc_desc5_bits, ac_vlc_desc6_bits, ac_vlc_desc7_bits,
+    ac_vlc_desc8_bits, ac_vlc_desc9_bits, ac_vlc_descA_bits, ac_vlc_descB_bits,
+    ac_vlc_descC_bits,
+};
+
+#endif /* AVCODEC_TSCC2_DATA_H */

libavcodec/version.h

@@ -27,7 +27,7 @@
  */
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR  33
+#define LIBAVCODEC_VERSION_MINOR  34
 #define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \

libavformat/riff.c

@@ -310,6 +310,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
     { CODEC_ID_EXR,          MKTAG('e', 'x', 'r', ' ') },
     { CODEC_ID_MSS1,         MKTAG('M', 'S', 'S', '1') },
     { CODEC_ID_MSA1,         MKTAG('M', 'S', 'A', '1') },
+    { CODEC_ID_TSCC2,        MKTAG('T', 'S', 'C', '2') },
     { CODEC_ID_NONE,         0 }
 };
 

libavformat/rtsp.c

@@ -63,7 +63,8 @@
 
 #define RTSP_FLAG_OPTS(name, longname) \
     { name, longname, OFFSET(rtsp_flags), AV_OPT_TYPE_FLAGS, {0}, INT_MIN, INT_MAX, DEC, "rtsp_flags" }, \
-    { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }
+    { "filter_src", "Only receive packets from the negotiated peer IP", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_FILTER_SRC}, 0, 0, DEC, "rtsp_flags" }, \
+    { "listen", "Wait for incoming connections", 0, AV_OPT_TYPE_CONST, {RTSP_FLAG_LISTEN}, 0, 0, DEC, "rtsp_flags" }
 
 #define RTSP_MEDIATYPE_OPTS(name, longname) \
     { name, longname, OFFSET(media_type_mask), AV_OPT_TYPE_FLAGS, { (1 << (AVMEDIA_TYPE_DATA+1)) - 1 }, INT_MIN, INT_MAX, DEC, "allowed_media_types" }, \
@@ -83,6 +84,7 @@ const AVOption ff_rtsp_options[] = {
     RTSP_MEDIATYPE_OPTS("allowed_media_types", "Media types to accept from the server"),
     { "min_port", "Minimum local UDP port", OFFSET(rtp_port_min), AV_OPT_TYPE_INT, {RTSP_RTP_PORT_MIN}, 0, 65535, DEC|ENC },
     { "max_port", "Maximum local UDP port", OFFSET(rtp_port_max), AV_OPT_TYPE_INT, {RTSP_RTP_PORT_MAX}, 0, 65535, DEC|ENC },
+    { "timeout", "Maximum timeout (in seconds) to wait for incoming connections. -1 is infinite. Implies flag listen", OFFSET(initial_timeout), AV_OPT_TYPE_INT, {-1}, INT_MIN, INT_MAX, DEC },
     { NULL },
 };
 
@@ -595,7 +597,7 @@ void ff_rtsp_close_streams(AVFormatContext *s)
     av_free(rt->recvbuf);
 }
 
-static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
+int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
 {
     RTSPState *rt = s->priv_data;
     AVStream *st = NULL;
@@ -749,6 +751,14 @@ static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
                     get_word_sep(buf, sizeof(buf), ";,", &p);
                     av_strlcpy(th->source, buf, sizeof(th->source));
                 }
+            } else if (!strcmp(parameter, "mode")) {
+                if (*p == '=') {
+                    p++;
+                    get_word_sep(buf, sizeof(buf), ";, ", &p);
+                    if (!strcmp(buf, "record") ||
+                        !strcmp(buf, "receive"))
+                        th->mode_record = 1;
+                }
             }
 
             while (*p != ';' && *p != '\0' && *p != ',')
@@ -1389,7 +1399,7 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
         }
         }
 
-        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
+        if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
             goto fail;
     }
 
@@ -1701,14 +1711,24 @@ static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
             }
 #if CONFIG_RTSP_DEMUXER
             if (tcp_fd != -1 && p[0].revents & POLLIN) {
-                RTSPMessageHeader reply;
-
-                ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
-                if (ret < 0)
-                    return ret;
-                /* XXX: parse message */
-                if (rt->state != RTSP_STATE_STREAMING)
-                    return 0;
+                if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
+                    if (rt->state == RTSP_STATE_STREAMING) {
+                        if (!ff_rtsp_parse_streaming_commands(s))
+                            return AVERROR_EOF;
+                        else
+                            av_log(s, AV_LOG_WARNING,
+                                   "Unable to answer to TEARDOWN\n");
+                    } else
+                        return 0;
+                } else {
+                    RTSPMessageHeader reply;
+                    ret = ff_rtsp_read_reply(s, &reply, NULL, 0, NULL);
+                    if (ret < 0)
+                        return ret;
+                    /* XXX: parse message */
+                    if (rt->state != RTSP_STATE_STREAMING)
+                        return 0;
+                }
             }
 #endif
         } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
@@ -1912,7 +1932,7 @@ static int sdp_read_header(AVFormatContext *s)
             err = AVERROR_INVALIDDATA;
             goto fail;
         }
-        if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
+        if ((err = ff_rtsp_open_transport_ctx(s, rtsp_st)))
             goto fail;
     }
     return 0;

libavformat/rtsp.h

@@ -102,6 +102,9 @@ typedef struct RTSPTransportField {
      * packets will be allowed to make before being discarded. */
     int ttl;
 
+    /** transport set to record data */
+    int mode_record;
+
     struct sockaddr_storage destination; /**< destination IP address */
     char source[INET6_ADDRSTRLEN + 1]; /**< source IP address */
 
@@ -369,11 +372,17 @@ typedef struct RTSPState {
      * Minimum and maximum local UDP ports.
      */
     int rtp_port_min, rtp_port_max;
+
+    /**
+     * Timeout to wait for incoming connections.
+     */
+    int initial_timeout;
 } RTSPState;
 
 #define RTSP_FLAG_FILTER_SRC  0x1    /**< Filter incoming UDP packets -
                                           receive packets only from the right
                                           source address and port. */
+#define RTSP_FLAG_LISTEN 0x2         /**< Wait for incoming connections. */
 
 /**
  * Describe a single stream, as identified by a single m= line block in the
@@ -525,6 +534,12 @@ int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply);
  */
 int ff_rtsp_setup_output_streams(AVFormatContext *s, const char *addr);
 
+/**
+ * Parse RTSP commands (OPTIONS, PAUSE and TEARDOWN) during streaming in
+ * listen mode.
+ */
+int ff_rtsp_parse_streaming_commands(AVFormatContext *s);
+
 /**
  * Parse an SDP description of streams by populating an RTSPState struct
  * within the AVFormatContext; also allocate the RTP streams and the
@@ -558,6 +573,11 @@ int ff_rtsp_make_setup_request(AVFormatContext *s, const char *host, int port,
  */
 void ff_rtsp_undo_setup(AVFormatContext *s);
 
+/**
+ * Open RTSP transport context.
+ */
+int ff_rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st);
+
 extern const AVOption ff_rtsp_options[];
 
 #endif /* AVFORMAT_RTSP_H */

libavformat/rtspcodes.h

@@ -37,4 +37,18 @@ RTSP_STATUS_SERVICE         =503, /**< Service Unavailable */
 RTSP_STATUS_VERSION         =505, /**< RTSP Version not supported */
 };
 
+enum RTSPMethod {
+    DESCRIBE,
+    ANNOUNCE,
+    OPTIONS,
+    SETUP,
+    PLAY,
+    PAUSE,
+    TEARDOWN,
+    GET_PARAMETER,
+    SET_PARAMETER,
+    REDIRECT,
+    RECORD,
+    UNKNOWN = -1,
+};
 #endif /* AVFORMAT_RTSPCODES_H */

libavformat/rtspdec.c

@@ -22,6 +22,7 @@
 #include "libavutil/avstring.h"
 #include "libavutil/intreadwrite.h"
 #include "libavutil/mathematics.h"
+#include "libavutil/random_seed.h"
 #include "avformat.h"
 
 #include "internal.h"
@@ -31,6 +32,462 @@
 #include "rdt.h"
 #include "url.h"
 
+static const struct RTSPStatusMessage {
+    enum RTSPStatusCode code;
+    const char *message;
+} status_messages[] = {
+    { RTSP_STATUS_OK,             "OK"                               },
+    { RTSP_STATUS_METHOD,         "Method Not Allowed"               },
+    { RTSP_STATUS_BANDWIDTH,      "Not Enough Bandwidth"             },
+    { RTSP_STATUS_SESSION,        "Session Not Found"                },
+    { RTSP_STATUS_STATE,          "Method Not Valid in This State"   },
+    { RTSP_STATUS_AGGREGATE,      "Aggregate operation not allowed"  },
+    { RTSP_STATUS_ONLY_AGGREGATE, "Only aggregate operation allowed" },
+    { RTSP_STATUS_TRANSPORT,      "Unsupported transport"            },
+    { RTSP_STATUS_INTERNAL,       "Internal Server Error"            },
+    { RTSP_STATUS_SERVICE,        "Service Unavailable"              },
+    { RTSP_STATUS_VERSION,        "RTSP Version not supported"       },
+    { 0,                          "NULL"                             }
+};
+
+static int rtsp_read_close(AVFormatContext *s)
+{
+    RTSPState *rt = s->priv_data;
+
+    if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN))
+        ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
+
+    ff_rtsp_close_streams(s);
+    ff_rtsp_close_connections(s);
+    ff_network_close();
+    rt->real_setup = NULL;
+    av_freep(&rt->real_setup_cache);
+    return 0;
+}
+
+static inline int read_line(AVFormatContext *s, char *rbuf, const int rbufsize,
+                            int *rbuflen)
+{
+    RTSPState *rt = s->priv_data;
+    int idx       = 0;
+    int ret       = 0;
+    *rbuflen      = 0;
+
+    do {
+        ret = ffurl_read_complete(rt->rtsp_hd, rbuf + idx, 1);
+        if (ret < 0)
+            return ret;
+        if (rbuf[idx] == '\r') {
+            /* Ignore */
+        } else if (rbuf[idx] == '\n') {
+            rbuf[idx] = '\0';
+            *rbuflen  = idx;
+            return 0;
+        } else
+            idx++;
+    } while (idx < rbufsize);
+    av_log(s, AV_LOG_ERROR, "Message too long\n");
+    return AVERROR(EIO);
+}
+
+static int rtsp_send_reply(AVFormatContext *s, enum RTSPStatusCode code,
+                           const char *extracontent, uint16_t seq)
+{
+    RTSPState *rt = s->priv_data;
+    char message[4096];
+    int index = 0;
+    while (status_messages[index].code) {
+        if (status_messages[index].code == code) {
+            snprintf(message, sizeof(message), "RTSP/1.0 %d %s\r\n",
+                     code, status_messages[index].message);
+            break;
+        }
+        index++;
+    }
+    if (!status_messages[index].code)
+        return AVERROR(EINVAL);
+    av_strlcatf(message, sizeof(message), "CSeq: %d\r\n", seq);
+    av_strlcatf(message, sizeof(message), "Server: %s\r\n", LIBAVFORMAT_IDENT);
+    if (extracontent)
+        av_strlcat(message, extracontent, sizeof(message));
+    av_strlcat(message, "\r\n", sizeof(message));
+    av_dlog(s, "Sending response:\n%s", message);
+    ffurl_write(rt->rtsp_hd, message, strlen(message));
+
+    return 0;
+}
+
+static inline int check_sessionid(AVFormatContext *s,
+                                  RTSPMessageHeader *request)
+{
+    RTSPState *rt = s->priv_data;
+    unsigned char *session_id = rt->session_id;
+    if (!session_id[0]) {
+        av_log(s, AV_LOG_WARNING, "There is no session-id at the moment\n");
+        return 0;
+    }
+    if (strcmp(session_id, request->session_id)) {
+        av_log(s, AV_LOG_ERROR, "Unexpected session-id %s\n",
+               request->session_id);
+        rtsp_send_reply(s, RTSP_STATUS_SESSION, NULL, request->seq);
+        return AVERROR_STREAM_NOT_FOUND;
+    }
+    return 0;
+}
+
+static inline int rtsp_read_request(AVFormatContext *s,
+                                    RTSPMessageHeader *request,
+                                    const char *method)
+{
+    RTSPState *rt = s->priv_data;
+    char rbuf[1024];
+    int rbuflen, ret;
+    do {
+        ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
+        if (ret)
+            return ret;
+        if (rbuflen > 1) {
+            av_dlog(s, "Parsing[%d]: %s\n", rbuflen, rbuf);
+            ff_rtsp_parse_line(request, rbuf, rt, method);
+        }
+    } while (rbuflen > 0);
+    if (request->seq != rt->seq + 1) {
+        av_log(s, AV_LOG_ERROR, "Unexpected Sequence number %d\n",
+               request->seq);
+        return AVERROR(EINVAL);
+    }
+    if (rt->session_id[0] && strcmp(method, "OPTIONS")) {
+        ret = check_sessionid(s, request);
+        if (ret)
+            return ret;
+    }
+
+    return 0;
+}
+
+static int rtsp_read_announce(AVFormatContext *s)
+{
+    RTSPState *rt             = s->priv_data;
+    RTSPMessageHeader request = { 0 };
+    char sdp[4096];
+    int  ret;
+
+    ret = rtsp_read_request(s, &request, "ANNOUNCE");
+    if (ret)
+        return ret;
+    rt->seq++;
+    if (strcmp(request.content_type, "application/sdp")) {
+        av_log(s, AV_LOG_ERROR, "Unexpected content type %s\n",
+               request.content_type);
+        rtsp_send_reply(s, RTSP_STATUS_SERVICE, NULL, request.seq);
+        return AVERROR_OPTION_NOT_FOUND;
+    }
+    if (request.content_length && request.content_length < sizeof(sdp) - 1) {
+        /* Read SDP */
+        if (ffurl_read_complete(rt->rtsp_hd, sdp, request.content_length)
+            < request.content_length) {
+            av_log(s, AV_LOG_ERROR,
+                   "Unable to get complete SDP Description in ANNOUNCE\n");
+            rtsp_send_reply(s, RTSP_STATUS_INTERNAL, NULL, request.seq);
+            return AVERROR(EIO);
+        }
+        sdp[request.content_length] = '\0';
+        av_log(s, AV_LOG_VERBOSE, "SDP: %s\n", sdp);
+        ret = ff_sdp_parse(s, sdp);
+        if (ret)
+            return ret;
+        rtsp_send_reply(s, RTSP_STATUS_OK, NULL, request.seq);
+        return 0;
+    }
+    av_log(s, AV_LOG_ERROR,
+           "Content-Length header value exceeds sdp allocated buffer (4KB)\n");
+    rtsp_send_reply(s, RTSP_STATUS_INTERNAL,
+                    "Content-Length exceeds buffer size", request.seq);
+    return AVERROR(EIO);
+}
+
+static int rtsp_read_options(AVFormatContext *s)
+{
+    RTSPState *rt             = s->priv_data;
+    RTSPMessageHeader request = { 0 };
+    int ret                   = 0;
+
+    /* Parsing headers */
+    ret = rtsp_read_request(s, &request, "OPTIONS");
+    if (ret)
+        return ret;
+    rt->seq++;
+    /* Send Reply */
+    rtsp_send_reply(s, RTSP_STATUS_OK,
+                    "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, RECORD\r\n",
+                    request.seq);
+    return 0;
+}
+
+static int rtsp_read_setup(AVFormatContext *s, char* host, char *controlurl)
+{
+    RTSPState *rt             = s->priv_data;
+    RTSPMessageHeader request = { 0 };
+    int ret                   = 0;
+    char url[1024];
+    RTSPStream *rtsp_st;
+    char responseheaders[1024];
+    int localport    = -1;
+    int transportidx = 0;
+    int streamid     = 0;
+
+    ret = rtsp_read_request(s, &request, "SETUP");
+    if (ret)
+        return ret;
+    rt->seq++;
+    if (!request.nb_transports) {
+        av_log(s, AV_LOG_ERROR, "No transport defined in SETUP\n");
+        return AVERROR_INVALIDDATA;
+    }
+    for (transportidx = 0; transportidx < request.nb_transports;
+         transportidx++) {
+        if (!request.transports[transportidx].mode_record ||
+            (request.transports[transportidx].lower_transport !=
+             RTSP_LOWER_TRANSPORT_UDP &&
+             request.transports[transportidx].lower_transport !=
+             RTSP_LOWER_TRANSPORT_TCP)) {
+            av_log(s, AV_LOG_ERROR, "mode=record/receive not set or transport"
+                   " protocol not supported (yet)\n");
+            return AVERROR_INVALIDDATA;
+        }
+    }
+    if (request.nb_transports > 1)
+        av_log(s, AV_LOG_WARNING, "More than one transport not supported, "
+               "using first of all\n");
+    for (streamid = 0; streamid < rt->nb_rtsp_streams; streamid++) {
+        if (!strcmp(rt->rtsp_streams[streamid]->control_url,
+                    controlurl))
+            break;
+    }
+    if (streamid == rt->nb_rtsp_streams) {
+        av_log(s, AV_LOG_ERROR, "Unable to find requested track\n");
+        return AVERROR_STREAM_NOT_FOUND;
+    }
+    rtsp_st   = rt->rtsp_streams[streamid];
+    localport = rt->rtp_port_min;
+
+    if (request.transports[0].lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
+        rt->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
+        if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
+            rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
+            return ret;
+        }
+        rtsp_st->interleaved_min = request.transports[0].interleaved_min;
+        rtsp_st->interleaved_max = request.transports[0].interleaved_max;
+        snprintf(responseheaders, sizeof(responseheaders), "Transport: "
+                 "RTP/AVP/TCP;unicast;mode=receive;interleaved=%d-%d"
+                 "\r\n", request.transports[0].interleaved_min,
+                 request.transports[0].interleaved_max);
+    } else {
+        do {
+            ff_url_join(url, sizeof(url), "rtp", NULL, host, localport, NULL);
+            av_dlog(s, "Opening: %s", url);
+            ret = ffurl_open(&rtsp_st->rtp_handle, url, AVIO_FLAG_READ_WRITE,
+                             &s->interrupt_callback, NULL);
+            if (ret)
+                localport += 2;
+        } while (ret || localport > rt->rtp_port_max);
+        if (localport > rt->rtp_port_max) {
+            rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
+            return ret;
+        }
+
+        av_dlog(s, "Listening on: %d",
+                ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle));
+        if ((ret = ff_rtsp_open_transport_ctx(s, rtsp_st))) {
+            rtsp_send_reply(s, RTSP_STATUS_TRANSPORT, NULL, request.seq);
+            return ret;
+        }
+
+        localport = ff_rtp_get_local_rtp_port(rtsp_st->rtp_handle);
+        snprintf(responseheaders, sizeof(responseheaders), "Transport: "
+                 "RTP/AVP/UDP;unicast;mode=receive;source=%s;"
+                 "client_port=%d-%d;server_port=%d-%d\r\n",
+                 host, request.transports[0].client_port_min,
+                 request.transports[0].client_port_max, localport,
+                 localport + 1);
+    }
+
+    /* Establish sessionid if not previously set */
+    /* Put this in a function? */
+    /* RFC 2326: session id must be at least 8 digits */
+    while (strlen(rt->session_id) < 8)
+        av_strlcatf(rt->session_id, 512, "%u", av_get_random_seed());
+
+    av_strlcatf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
+                rt->session_id);
+    /* Send Reply */
+    rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
+
+    rt->state = RTSP_STATE_PAUSED;
+    return 0;
+}
+
+static int rtsp_read_record(AVFormatContext *s)
+{
+    RTSPState *rt             = s->priv_data;
+    RTSPMessageHeader request = { 0 };
+    int ret                   = 0;
+    char responseheaders[1024];
+
+    ret = rtsp_read_request(s, &request, "RECORD");
+    if (ret)
+        return ret;
+    ret = check_sessionid(s, &request);
+    if (ret)
+        return ret;
+    rt->seq++;
+    snprintf(responseheaders, sizeof(responseheaders), "Session: %s\r\n",
+             rt->session_id);
+    rtsp_send_reply(s, RTSP_STATUS_OK, responseheaders, request.seq);
+
+    rt->state = RTSP_STATE_STREAMING;
+    return 0;
+}
+
+static inline int parse_command_line(AVFormatContext *s, const char *line,
+                                     int linelen, char *uri, int urisize,
+                                     char *method, int methodsize,
+                                     enum RTSPMethod *methodcode)
+{
+    RTSPState *rt = s->priv_data;
+    const char *linept, *searchlinept;
+    linept = strchr(line, ' ');
+    if (linept - line > methodsize - 1) {
+        av_log(s, AV_LOG_ERROR, "Method string too long\n");
+        return AVERROR(EIO);
+    }
+    memcpy(method, line, linept - line);
+    method[linept - line] = '\0';
+    linept++;
+    if (!strcmp(method, "ANNOUNCE"))
+        *methodcode = ANNOUNCE;
+    else if (!strcmp(method, "OPTIONS"))
+        *methodcode = OPTIONS;
+    else if (!strcmp(method, "RECORD"))
+        *methodcode = RECORD;
+    else if (!strcmp(method, "SETUP"))
+        *methodcode = SETUP;
+    else if (!strcmp(method, "PAUSE"))
+        *methodcode = PAUSE;
+    else if (!strcmp(method, "TEARDOWN"))
+        *methodcode = TEARDOWN;
+    else
+        *methodcode = UNKNOWN;
+    /* Check method with the state  */
+    if (rt->state == RTSP_STATE_IDLE) {
+        if ((*methodcode != ANNOUNCE) && (*methodcode != OPTIONS)) {
+            av_log(s, AV_LOG_ERROR, "Unexpected command in Idle State %s\n",
+                   line);
+            return AVERROR_PROTOCOL_NOT_FOUND;
+        }
+    } else if (rt->state == RTSP_STATE_PAUSED) {
+        if ((*methodcode != OPTIONS) && (*methodcode != RECORD)
+            && (*methodcode != SETUP)) {
+            av_log(s, AV_LOG_ERROR, "Unexpected command in Paused State %s\n",
+                   line);
+            return AVERROR_PROTOCOL_NOT_FOUND;
+        }
+    } else if (rt->state == RTSP_STATE_STREAMING) {
+        if ((*methodcode != PAUSE) && (*methodcode != OPTIONS)
+            && (*methodcode != TEARDOWN)) {
+            av_log(s, AV_LOG_ERROR, "Unexpected command in Streaming State"
+                   " %s\n", line);
+            return AVERROR_PROTOCOL_NOT_FOUND;
+        }
+    } else {
+        av_log(s, AV_LOG_ERROR, "Unexpected State [%d]\n", rt->state);
+        return AVERROR_BUG;
+    }
+
+    searchlinept = strchr(linept, ' ');
+    if (searchlinept == NULL) {
+        av_log(s, AV_LOG_ERROR, "Error parsing message URI\n");
+        return AVERROR_INVALIDDATA;
+    }
+    if (searchlinept - linept > urisize - 1) {
+        av_log(s, AV_LOG_ERROR, "uri string length exceeded buffer size\n");
+        return AVERROR(EIO);
+    }
+    memcpy(uri, linept, searchlinept - linept);
+    uri[searchlinept - linept] = '\0';
+    if (strcmp(rt->control_uri, uri)) {
+        char host[128], path[512], auth[128];
+        int port;
+        char ctl_host[128], ctl_path[512], ctl_auth[128];
+        int ctl_port;
+        av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port,
+                     path, sizeof(path), uri);
+        av_url_split(NULL, 0, ctl_auth, sizeof(ctl_auth), ctl_host,
+                     sizeof(ctl_host), &ctl_port, ctl_path, sizeof(ctl_path),
+                     rt->control_uri);
+        if (strcmp(host, ctl_host))
+            av_log(s, AV_LOG_INFO, "Host %s differs from expected %s\n",
+                   host, ctl_host);
+        if (strcmp(path, ctl_path) && *methodcode != SETUP)
+            av_log(s, AV_LOG_WARNING, "WARNING: Path %s differs from expected"
+                   " %s\n", path, ctl_path);
+        if (*methodcode == ANNOUNCE) {
+            av_log(s, AV_LOG_INFO,
+                   "Updating control URI to %s\n", uri);
+            strcpy(rt->control_uri, uri);
+        }
+    }
+
+    linept = searchlinept + 1;
+    if (!av_strstart(linept, "RTSP/1.0", NULL)) {
+        av_log(s, AV_LOG_ERROR, "Error parsing protocol or version\n");
+        return AVERROR_PROTOCOL_NOT_FOUND;
+    }
+    return 0;
+}
+
+int ff_rtsp_parse_streaming_commands(AVFormatContext *s)
+{
+    RTSPState *rt = s->priv_data;
+    unsigned char rbuf[4096];
+    unsigned char method[10];
+    char uri[500];
+    int ret;
+    int rbuflen               = 0;
+    RTSPMessageHeader request = { 0 };
+    enum RTSPMethod methodcode;
+
+    ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
+    if (ret < 0)
+        return ret;
+    ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
+                             sizeof(method), &methodcode);
+    if (ret) {
+        av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
+        return ret;
+    }
+
+    ret = rtsp_read_request(s, &request, method);
+    if (ret)
+        return ret;
+    rt->seq++;
+    if (methodcode == PAUSE) {
+        rt->state = RTSP_STATE_PAUSED;
+        ret       = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
+        // TODO: Missing date header in response
+    } else if (methodcode == OPTIONS) {
+        ret = rtsp_send_reply(s, RTSP_STATUS_OK,
+                              "Public: ANNOUNCE, PAUSE, SETUP, TEARDOWN, "
+                              "RECORD\r\n", request.seq);
+    } else if (methodcode == TEARDOWN) {
+        rt->state = RTSP_STATE_IDLE;
+        ret       = rtsp_send_reply(s, RTSP_STATUS_OK, NULL , request.seq);
+        return 0;
+    }
+    return ret;
+}
+
 static int rtsp_read_play(AVFormatContext *s)
 {
     RTSPState *rt = s->priv_data;
@@ -143,6 +600,67 @@ int ff_rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
     return 0;
 }
 
+static int rtsp_listen(AVFormatContext *s)
+{
+    RTSPState *rt = s->priv_data;
+    char host[128], path[512], auth[128];
+    char uri[500];
+    int port;
+    char tcpname[500];
+    unsigned char rbuf[4096];
+    unsigned char method[10];
+    int rbuflen = 0;
+    int ret;
+    enum RTSPMethod methodcode;
+
+    /* extract hostname and port */
+    av_url_split(NULL, 0, auth, sizeof(auth), host, sizeof(host), &port,
+                 path, sizeof(path), s->filename);
+
+    /* ff_url_join. No authorization by now (NULL) */
+    ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL, host,
+                port, "%s", path);
+    /* Create TCP connection */
+    ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port,
+                "?listen&listen_timeout=%d", rt->initial_timeout * 1000);
+
+    if (ret = ffurl_open(&rt->rtsp_hd, tcpname, AVIO_FLAG_READ_WRITE,
+                         &s->interrupt_callback, NULL)) {
+        av_log(s, AV_LOG_ERROR, "Unable to open RTSP for listening\n");
+        return ret;
+    }
+    rt->state       = RTSP_STATE_IDLE;
+    rt->rtsp_hd_out = rt->rtsp_hd;
+    for (;;) { /* Wait for incoming RTSP messages */
+        ret = read_line(s, rbuf, sizeof(rbuf), &rbuflen);
+        if (ret < 0)
+            return ret;
+        ret = parse_command_line(s, rbuf, rbuflen, uri, sizeof(uri), method,
+                                 sizeof(method), &methodcode);
+        if (ret) {
+            av_log(s, AV_LOG_ERROR, "RTSP: Unexpected Command\n");
+            return ret;
+        }
+
+        if (methodcode == ANNOUNCE) {
+            ret       = rtsp_read_announce(s);
+            rt->state = RTSP_STATE_PAUSED;
+        } else if (methodcode == OPTIONS) {
+            ret = rtsp_read_options(s);
+        } else if (methodcode == RECORD) {
+            ret = rtsp_read_record(s);
+            if (!ret)
+                return 0; // We are ready for streaming
+        } else if (methodcode == SETUP)
+            ret = rtsp_read_setup(s, host, uri);
+        if (ret) {
+            ffurl_close(rt->rtsp_hd);
+            return AVERROR_INVALIDDATA;
+        }
+    }
+    return 0;
+}
+
 static int rtsp_probe(AVProbeData *p)
 {
     if (av_strstart(p->filename, "rtsp:", NULL))
@@ -155,23 +673,32 @@ static int rtsp_read_header(AVFormatContext *s)
     RTSPState *rt = s->priv_data;
     int ret;
 
-    ret = ff_rtsp_connect(s);
-    if (ret)
-        return ret;
-
-    rt->real_setup_cache = !s->nb_streams ? NULL :
-                           av_mallocz(2 * s->nb_streams * sizeof(*rt->real_setup_cache));
-    if (!rt->real_setup_cache && s->nb_streams)
-        return AVERROR(ENOMEM);
-    rt->real_setup = rt->real_setup_cache + s->nb_streams;
+    if (rt->initial_timeout > 0)
+        rt->rtsp_flags |= RTSP_FLAG_LISTEN;
 
-    if (rt->initial_pause) {
-         /* do not start immediately */
+    if (rt->rtsp_flags & RTSP_FLAG_LISTEN) {
+        ret = rtsp_listen(s);
+        if (ret)
+            return ret;
     } else {
-         if (rtsp_read_play(s) < 0) {
-            ff_rtsp_close_streams(s);
-            ff_rtsp_close_connections(s);
-            return AVERROR_INVALIDDATA;
+        ret = ff_rtsp_connect(s);
+        if (ret)
+            return ret;
+
+        rt->real_setup_cache = !s->nb_streams ? NULL :
+            av_mallocz(2 * s->nb_streams * sizeof(*rt->real_setup_cache));
+        if (!rt->real_setup_cache && s->nb_streams)
+            return AVERROR(ENOMEM);
+        rt->real_setup = rt->real_setup_cache + s->nb_streams;
+
+        if (rt->initial_pause) {
+            /* do not start immediately */
+        } else {
+            if (rtsp_read_play(s) < 0) {
+                ff_rtsp_close_streams(s);
+                ff_rtsp_close_connections(s);
+                return AVERROR_INVALIDDATA;
+            }
         }
     }
 
@@ -335,20 +862,22 @@ retry:
     }
     rt->packets++;
 
-    /* send dummy request to keep TCP connection alive */
-    if ((av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 ||
-         rt->auth_state.stale) {
-        if (rt->server_type == RTSP_SERVER_WMS ||
-           (rt->server_type != RTSP_SERVER_REAL &&
-            rt->get_parameter_supported)) {
-            ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
-        } else {
-            ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
+    if (!(rt->rtsp_flags & RTSP_FLAG_LISTEN)) {
+        /* send dummy request to keep TCP connection alive */
+        if ((av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2 ||
+            rt->auth_state.stale) {
+            if (rt->server_type == RTSP_SERVER_WMS ||
+                (rt->server_type != RTSP_SERVER_REAL &&
+                 rt->get_parameter_supported)) {
+                ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
+            } else {
+                ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
+            }
+            /* The stale flag should be reset when creating the auth response in
+             * ff_rtsp_send_cmd_async, but reset it here just in case we never
+             * called the auth code (if we didn't have any credentials set). */
+            rt->auth_state.stale = 0;
         }
-        /* The stale flag should be reset when creating the auth response in
-         * ff_rtsp_send_cmd_async, but reset it here just in case we never
-         * called the auth code (if we didn't have any credentials set). */
-        rt->auth_state.stale = 0;
     }
 
     return 0;
@@ -380,20 +909,6 @@ static int rtsp_read_seek(AVFormatContext *s, int stream_index,
     return 0;
 }
 
-static int rtsp_read_close(AVFormatContext *s)
-{
-    RTSPState *rt = s->priv_data;
-
-    ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
-
-    ff_rtsp_close_streams(s);
-    ff_rtsp_close_connections(s);
-    ff_network_close();
-    rt->real_setup = NULL;
-    av_freep(&rt->real_setup_cache);
-    return 0;
-}
-
 static const AVClass rtsp_demuxer_class = {
     .class_name     = "RTSP demuxer",
     .item_name      = av_default_item_name,

libavformat/version.h

@@ -30,7 +30,7 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 15
+#define LIBAVFORMAT_VERSION_MINOR 16
 #define LIBAVFORMAT_VERSION_MICRO 104
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \

libavutil/libm.h

@@ -90,6 +90,13 @@ static av_always_inline av_const int isnan(float x)
 #define log2f(x) ((float)log2(x))
 #endif /* HAVE_LOG2F */
 
+#if !HAVE_RINT
+static inline double rint(double x)
+{
+    return x >= 0 ? floor(x + 0.5) : ceil(x - 0.5);
+}
+#endif /* HAVE_RINT */
+
 #if !HAVE_LRINT
 static av_always_inline av_const long int lrint(double x)
 {