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avcodec: Cineform HD Decoder 

Decodes YUV 4:2:2 10-bit and RGB 12-bit files.
Older files with more subbands, skips, Bayer, alpha not supported.
Alpha requires addition of GBRAP12 pixel format.
tags/n3.0
Kieran Kunhya 9 years ago
parent
31f5fa21b0
commit
3485332bf9
8 changed files with 1195 additions and 0 deletions
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  1. +1
    -0
      libavcodec/Makefile
  2. +1
    -0
      libavcodec/allcodecs.c
  3. +1
    -0
      libavcodec/avcodec.h
  4. +749
    -0
      libavcodec/cfhd.c
  5. +112
    -0
      libavcodec/cfhd.h
  6. +323
    -0
      libavcodec/cfhddata.c
  7. +7
    -0
      libavcodec/codec_desc.c
  8. +1
    -0
      libavformat/riff.c

+ 1
- 0
libavcodec/Makefile View File

@@ -210,6 +210,7 @@ OBJS-$(CONFIG_CAVS_DECODER) += cavs.o cavsdec.o cavsdsp.o \
OBJS-$(CONFIG_CCAPTION_DECODER) += ccaption_dec.o
OBJS-$(CONFIG_CDGRAPHICS_DECODER) += cdgraphics.o
OBJS-$(CONFIG_CDXL_DECODER) += cdxl.o
OBJS-$(CONFIG_CFHD_DECODER) += cfhd.o cfhddata.o
OBJS-$(CONFIG_CINEPAK_DECODER) += cinepak.o
OBJS-$(CONFIG_CINEPAK_ENCODER) += cinepakenc.o elbg.o
OBJS-$(CONFIG_CLJR_DECODER) += cljrdec.o


+ 1
- 0
libavcodec/allcodecs.c View File

@@ -148,6 +148,7 @@ void avcodec_register_all(void)
REGISTER_DECODER(CAVS, cavs);
REGISTER_DECODER(CDGRAPHICS, cdgraphics);
REGISTER_DECODER(CDXL, cdxl);
REGISTER_DECODER(CFHD, cfhd);
REGISTER_ENCDEC (CINEPAK, cinepak);
REGISTER_ENCDEC (CLJR, cljr);
REGISTER_DECODER(CLLC, cllc);


+ 1
- 0
libavcodec/avcodec.h View File

@@ -315,6 +315,7 @@ enum AVCodecID {
AV_CODEC_ID_SMVJPEG,
AV_CODEC_ID_APNG,
AV_CODEC_ID_DAALA,
AV_CODEC_ID_CFHD,

/* various PCM "codecs" */
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs


+ 749
- 0
libavcodec/cfhd.c View File

@@ -0,0 +1,749 @@
/*
* Copyright (c) 2015-2016 Kieran Kunhya <kieran@kunhya.com>
*
* 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
* CFHD Video Decoder
*/

#include "libavutil/buffer.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"

#include "avcodec.h"
#include "internal.h"
#include "bytestream.h"
#include "thread.h"
#include "cfhd.h"

#define SUBBAND_COUNT 10

static av_cold int cfhd_decode_init(AVCodecContext *avctx)
{
CFHDContext *s = avctx->priv_data;

avctx->bits_per_raw_sample = 10;
s->avctx = avctx;
avctx->width = 0;
avctx->height = 0;

return ff_cfhd_init_vlcs(s);
}

static void init_plane_defaults(CFHDContext *s)
{
s->subband_num = 0;
s->level = 0;
s->subband_num_actual = 0;
}

static void init_frame_defaults(CFHDContext *s)
{
s->coded_width = 0;
s->coded_height = 0;
s->bpc = 10;
s->channel_cnt = 4;
s->subband_cnt = 10;
s->channel_num = 0;
s->lowpass_precision = 16;
s->quantisation = 1;
s->wavelet_depth = 3;
s->pshift = 1;
s->codebook = 0;
init_plane_defaults(s);
}

/* TODO: merge with VLC tables or use LUT */
static inline int dequant_and_decompand(int level, int quantisation)
{
int64_t abslevel = abs(level);
return (abslevel + ((768 * abslevel * abslevel * abslevel) / (255 * 255 * 255))) * FFSIGN(level) * quantisation;
}

static inline void filter(int16_t *output, ptrdiff_t out_stride, int16_t *low, ptrdiff_t low_stride,
int16_t *high, ptrdiff_t high_stride, int len, uint8_t clip)
{
int16_t tmp;

int i;
for (i = 0; i < len; i++) {
if (i == 0) {
tmp = (11*low[0*low_stride] - 4*low[1*low_stride] + low[2*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + high[0*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

tmp = ( 5*low[0*low_stride] + 4*low[1*low_stride] - low[2*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp - high[0*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
} else if (i == len-1) {
tmp = ( 5*low[i*low_stride] + 4*low[(i-1)*low_stride] - low[(i-2)*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + high[i*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

tmp = (11*low[i*low_stride] - 4*low[(i-1)*low_stride] + low[(i-2)*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp - high[i*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
} else {
tmp = (low[(i-1)*low_stride] - low[(i+1)*low_stride] + 4) >> 3;
output[(2*i+0)*out_stride] = (tmp + low[i*low_stride] + high[i*high_stride]) >> 1;
if (clip)
output[(2*i+0)*out_stride] = av_clip_uintp2_c(output[(2*i+0)*out_stride], clip);

tmp = (low[(i+1)*low_stride] - low[(i-1)*low_stride] + 4) >> 3;
output[(2*i+1)*out_stride] = (tmp + low[i*low_stride] - high[i*high_stride]) >> 1;
if (clip)
output[(2*i+1)*out_stride] = av_clip_uintp2_c(output[(2*i+1)*out_stride], clip);
}
}
}

static void horiz_filter(int16_t *output, int16_t *low, int16_t *high, int width)
{
filter(output, 1, low, 1, high, 1, width, 0);
}

static void horiz_filter_clip(int16_t *output, int16_t *low, int16_t *high, int width, uint8_t clip)
{
filter(output, 1, low, 1, high, 1, width, clip);
}

static void vert_filter(int16_t *output, int out_stride, int16_t *low, int low_stride,
int16_t *high, int high_stride, int len)
{
filter(output, out_stride, low, low_stride, high, high_stride, len, 0);
}

static void free_buffers(AVCodecContext *avctx)
{
CFHDContext *s = avctx->priv_data;
int i;

for (i = 0; i < 3; i++) {
av_freep(&s->plane[i].idwt_buf);
av_freep(&s->plane[i].idwt_tmp);
}
s->a_height = 0;
s->a_width = 0;
}

static int alloc_buffers(AVCodecContext *avctx)
{
CFHDContext *s = avctx->priv_data;
int i, j, k, ret;

if ((ret = ff_set_dimensions(avctx, s->coded_width, s->coded_height)) < 0)
return ret;

avcodec_get_chroma_sub_sample(avctx->pix_fmt, &s->chroma_x_shift, &s->chroma_y_shift);

for (i = 0; i < 3; i++) {
int width = i ? avctx->width >> s->chroma_x_shift : avctx->width;
int height = i ? avctx->height >> s->chroma_y_shift : avctx->height;
int stride = FFALIGN(width / 8, 8) * 8;
int w8, h8, w4, h4, w2, h2;
height = FFALIGN(height / 8, 2) * 8;
s->plane[i].width = width;
s->plane[i].height = height;
s->plane[i].stride = stride;

w8 = FFALIGN(s->plane[i].width / 8, 8);
h8 = FFALIGN(s->plane[i].height / 8, 2);
w4 = w8 * 2;
h4 = h8 * 2;
w2 = w4 * 2;
h2 = h4 * 2;

s->plane[i].idwt_buf = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_buf));
s->plane[i].idwt_tmp = av_malloc_array(height * stride, sizeof(*s->plane[i].idwt_tmp));
if (!s->plane[i].idwt_buf || !s->plane[i].idwt_tmp) {
return AVERROR(ENOMEM);
}

s->plane[i].subband[0] = s->plane[i].idwt_buf;
s->plane[i].subband[1] = s->plane[i].idwt_buf + 2 * w8 * h8;
s->plane[i].subband[2] = s->plane[i].idwt_buf + 1 * w8 * h8;
s->plane[i].subband[3] = s->plane[i].idwt_buf + 3 * w8 * h8;
s->plane[i].subband[4] = s->plane[i].idwt_buf + 2 * w4 * h4;
s->plane[i].subband[5] = s->plane[i].idwt_buf + 1 * w4 * h4;
s->plane[i].subband[6] = s->plane[i].idwt_buf + 3 * w4 * h4;
s->plane[i].subband[7] = s->plane[i].idwt_buf + 2 * w2 * h2;
s->plane[i].subband[8] = s->plane[i].idwt_buf + 1 * w2 * h2;
s->plane[i].subband[9] = s->plane[i].idwt_buf + 3 * w2 * h2;

for (j = 0; j < DWT_LEVELS; j++) {
for(k = 0; k < 4; k++) {
s->plane[i].band[j][k].a_width = w8 << j;
s->plane[i].band[j][k].a_height = h8 << j;
}
}

/* ll2 and ll1 commented out because they are done in-place */
s->plane[i].l_h[0] = s->plane[i].idwt_tmp;
s->plane[i].l_h[1] = s->plane[i].idwt_tmp + 2 * w8 * h8;
//s->plane[i].l_h[2] = ll2;
s->plane[i].l_h[3] = s->plane[i].idwt_tmp;
s->plane[i].l_h[4] = s->plane[i].idwt_tmp + 2 * w4 * h4;
//s->plane[i].l_h[5] = ll1;
s->plane[i].l_h[6] = s->plane[i].idwt_tmp;
s->plane[i].l_h[7] = s->plane[i].idwt_tmp + 2 * w2 * h2;
}

s->a_height = s->coded_height;
s->a_width = s->coded_width;

return 0;
}

static int cfhd_decode(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
CFHDContext *s = avctx->priv_data;
GetByteContext gb;
ThreadFrame frame = { .f = data };
AVFrame *pic = data;
int ret = 0, i, j, plane;
int16_t *coeff_data;

avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
init_frame_defaults(s);

bytestream2_init(&gb, avpkt->data, avpkt->size);

while (bytestream2_get_bytes_left(&gb) > 4) {
/* Bit weird but implement the tag parsing as the spec says */
uint16_t tagu = bytestream2_get_be16(&gb);
int16_t tag = (int16_t)tagu;
int8_t tag8 = (int8_t)(tagu >> 8);
uint16_t abstag = abs(tag);
int8_t abs_tag8 = abs(tag8);
uint16_t data = bytestream2_get_be16(&gb);
if (abs_tag8 >= 0x60 && abs_tag8 <= 0x6f) {
av_log(avctx, AV_LOG_DEBUG, "large len %x\n", ((tagu & 0xff) << 16) | data);
} else if (tag == 20) {
av_log(avctx, AV_LOG_DEBUG, "Width %"PRIu16"\n", data);
s->coded_width = data;
} else if (tag == 21) {
av_log(avctx, AV_LOG_DEBUG, "Height %"PRIu16"\n", data);
s->coded_height = data;
} else if (tag == 101) {
av_log(avctx, AV_LOG_DEBUG, "Bits per component: %"PRIu16"\n", data);
s->bpc = data;
} else if (tag == 12) {
av_log(avctx, AV_LOG_DEBUG, "Channel Count: %"PRIu16"\n", data);
s->channel_cnt = data;
if (data != 3) {
av_log(avctx, AV_LOG_ERROR, "Channel Count of %"PRIu16" is unsupported\n", data);
ret = AVERROR_PATCHWELCOME;
break;
}
} else if (tag == 14) {
av_log(avctx, AV_LOG_DEBUG, "Subband Count: %"PRIu16"\n", data);
if (data != SUBBAND_COUNT) {
av_log(avctx, AV_LOG_ERROR, "Subband Count of %"PRIu16" is unsupported\n", data);
ret = AVERROR_PATCHWELCOME;
break;
}
} else if (tag == 62) {
s->channel_num = data;
av_log(avctx, AV_LOG_DEBUG, "Channel number %"PRIu16"\n", data);
if (s->channel_num > 2) {
av_log(avctx, AV_LOG_ERROR, "Invalid channel number\n");
ret = AVERROR(EINVAL);
break;
}
init_plane_defaults(s);
} else if (tag == 48) {
if (s->subband_num != 0 && data == 1) // hack
s->level++;
av_log(avctx, AV_LOG_DEBUG, "Subband number %"PRIu16"\n", data);
s->subband_num = data;
if (s->level > DWT_LEVELS) {
av_log(avctx, AV_LOG_ERROR, "Invalid level\n");
ret = AVERROR(EINVAL);
break;
}
if (s->subband_num > 3) {
av_log(avctx, AV_LOG_ERROR, "Invalid subband number\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 51) {
av_log(avctx, AV_LOG_DEBUG, "Subband number actual %"PRIu16"\n", data);
s->subband_num_actual = data;
if (s->subband_num_actual >= 10) {
av_log(avctx, AV_LOG_ERROR, "Invalid subband number actual\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 35)
av_log(avctx, AV_LOG_DEBUG, "Lowpass precision bits: %"PRIu16"\n", data);
else if (tag == 53) {
s->quantisation = data;
av_log(avctx, AV_LOG_DEBUG, "Quantisation: %"PRIu16"\n", data);
} else if (tag == 109) {
s->prescale_shift[0] = (data >> 0) & 0x7;
s->prescale_shift[1] = (data >> 3) & 0x7;
s->prescale_shift[2] = (data >> 6) & 0x7;
av_log(avctx, AV_LOG_DEBUG, "Prescale shift (VC-5): %x\n", data);
} else if (tag == 27) {
s->plane[s->channel_num].band[0][0].width = data;
s->plane[s->channel_num].band[0][0].stride = data;
av_log(avctx, AV_LOG_DEBUG, "Lowpass width %"PRIu16"\n", data);
if (data < 2 || (data & 1) || data > s->plane[s->channel_num].band[0][0].a_width) {
av_log(avctx, AV_LOG_ERROR, "Invalid lowpass width\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 28) {
s->plane[s->channel_num].band[0][0].height = data;
av_log(avctx, AV_LOG_DEBUG, "Lowpass height %"PRIu16"\n", data);
if (data < 2 || data > s->plane[s->channel_num].band[0][0].height) {
av_log(avctx, AV_LOG_ERROR, "Invalid lowpass height\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 1)
av_log(avctx, AV_LOG_DEBUG, "Sample type? %"PRIu16"\n", data);
else if (tag == 10) {
if (data != 0) {
avpriv_report_missing_feature(avctx, "Transform type of %"PRIu16" is unsupported\n", data);
ret = AVERROR_PATCHWELCOME;
break;
}
av_log(avctx, AV_LOG_DEBUG, "Transform-type? %"PRIu16"\n", data);
} else if (abstag >= 0x4000 && abstag <= 0x40ff) {
av_log(avctx, AV_LOG_DEBUG, "Small chunk length %"PRIu16" %s\n", data * 4, tag < 0 ? "optional" : "required");
bytestream2_skipu(&gb, data * 4);
} else if (tag == 23) {
av_log(avctx, AV_LOG_DEBUG, "Skip frame\n");
avpriv_report_missing_feature(avctx, "Skip frame not supported\n");
ret = AVERROR_PATCHWELCOME;
break;
} else if (tag == 2) {
av_log(avctx, AV_LOG_DEBUG, "tag=2 header - skipping %i tag/value pairs\n", data);
for (i = 0; i < data; i++) {
uint16_t tag2 = bytestream2_get_be16(&gb);
uint16_t val2 = bytestream2_get_be16(&gb);
av_log(avctx, AV_LOG_DEBUG, "Tag/Value = %x %x\n", tag2, val2);
}
} else if (tag == 41) {
s->plane[s->channel_num].band[s->level][s->subband_num].width = data;
s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
av_log(avctx, AV_LOG_DEBUG, "Highpass width %i channel %i level %i subband %i\n", data, s->channel_num, s->level, s->subband_num);
if (data < 2 || (data & 1)) {
av_log(avctx, AV_LOG_ERROR, "Invalid highpass width\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 42) {
s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
av_log(avctx, AV_LOG_DEBUG, "Highpass height %i\n", data);
if (data < 2) {
av_log(avctx, AV_LOG_ERROR, "Invalid highpass height\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 49) {
s->plane[s->channel_num].band[s->level][s->subband_num].width = data;
s->plane[s->channel_num].band[s->level][s->subband_num].stride = FFALIGN(data, 8);
av_log(avctx, AV_LOG_DEBUG, "Highpass width2 %i\n", data);
if (data < 2 || (data & 1)) {
av_log(avctx, AV_LOG_ERROR, "Invalid highpass width2\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 50) {
s->plane[s->channel_num].band[s->level][s->subband_num].height = data;
av_log(avctx, AV_LOG_DEBUG, "Highpass height2 %i\n", data);
if (data < 2) {
av_log(avctx, AV_LOG_ERROR, "Invalid highpass height2\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 71) {
s->codebook = data;
av_log(avctx, AV_LOG_DEBUG, "Codebook %i\n", s->codebook);
} else if (tag == 72) {
s->codebook = data;
av_log(avctx, AV_LOG_DEBUG, "Other codebook? %i\n", s->codebook);
} else if (tag == 70) {
av_log(avctx, AV_LOG_DEBUG, "Subsampling or bit-depth flag? %i\n", data);
s->bpc = data;
if (!(s->bpc == 10 || s->bpc == 12)) {
av_log(avctx, AV_LOG_ERROR, "Invalid bits per channel\n");
ret = AVERROR(EINVAL);
break;
}
} else if (tag == 84) {
av_log(avctx, AV_LOG_DEBUG, "Sample format? %i\n", data);
if (data == 1)
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
else if (data == 3)
avctx->pix_fmt = AV_PIX_FMT_GBRP12;
else {
avpriv_report_missing_feature(avctx, "Sample format of %"PRIu16" is unsupported\n", data);
ret = AVERROR_PATCHWELCOME;
break;
}
} else
av_log(avctx, AV_LOG_DEBUG, "Unknown tag %i data %x\n", tag, data);

/* Some kind of end of header tag */
if (tag == 4 && data == 0x1a4a && s->coded_width && s->coded_height && avctx->pix_fmt != AV_PIX_FMT_NONE) {
if (s->a_width != s->coded_width || s->a_height != s->coded_height) {
free_buffers(avctx);
if ((ret = alloc_buffers(avctx)) < 0) {
free_buffers(avctx);
return ret;
}
}

if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
return ret;

s->coded_width = 0;
s->coded_height = 0;
}
coeff_data = s->plane[s->channel_num].subband[s->subband_num_actual];

/* Lowpass coefficients */
if (tag == 4 && data == 0xf0f && s->a_width && s->a_height) {
int lowpass_height = s->plane[s->channel_num].band[0][0].height;
int lowpass_width = s->plane[s->channel_num].band[0][0].width;
int lowpass_a_height = s->plane[s->channel_num].band[0][0].a_height;
int lowpass_a_width = s->plane[s->channel_num].band[0][0].a_width;

if (lowpass_height > lowpass_a_height || lowpass_width > lowpass_a_width ||
lowpass_a_width * lowpass_a_height * sizeof(int16_t) > bytestream2_get_bytes_left(&gb)) {
av_log(avctx, AV_LOG_ERROR, "Too many lowpass coefficients\n");
ret = AVERROR(EINVAL);
goto end;
}

av_log(avctx, AV_LOG_DEBUG, "Start of lowpass coeffs component %"PRIu16" height:%d, width:%d\n", s->channel_num, lowpass_height, lowpass_width);
for (i = 0; i < lowpass_height; i++) {
for (j = 0; j < lowpass_width; j++)
coeff_data[j] = bytestream2_get_be16u(&gb);

coeff_data += lowpass_width;
}

/* Copy last line of coefficients if odd height */
if (lowpass_height & 1) {
memcpy(&coeff_data[lowpass_height * lowpass_width],
&coeff_data[(lowpass_height - 1) * lowpass_width],
lowpass_width * sizeof(*coeff_data));
}

av_log(avctx, AV_LOG_DEBUG, "Lowpass coefficients %"PRIu16"\n", lowpass_width * lowpass_height);
}

if (tag == 55 && s->subband_num_actual != 255 && s->a_width && s->a_height) {
int highpass_height = s->plane[s->channel_num].band[s->level][s->subband_num].height;
int highpass_width = s->plane[s->channel_num].band[s->level][s->subband_num].width;
int highpass_a_width = s->plane[s->channel_num].band[s->level][s->subband_num].a_width;
int highpass_a_height = s->plane[s->channel_num].band[s->level][s->subband_num].a_height;
int highpass_stride = s->plane[s->channel_num].band[s->level][s->subband_num].stride;
int expected = highpass_height * highpass_stride;
int a_expected = highpass_a_height * highpass_a_width;
int level, run, coeff;
int count = 0, bytes;

if (highpass_height > highpass_a_height || highpass_width > highpass_a_width || a_expected < expected) {
av_log(avctx, AV_LOG_ERROR, "Too many highpass coefficents\n");
ret = AVERROR(EINVAL);
goto end;
}

av_log(avctx, AV_LOG_DEBUG, "Start subband coeffs plane %i level %i codebook %i expected %i\n", s->channel_num, s->level, s->codebook, expected);

init_get_bits(&s->gb, gb.buffer, bytestream2_get_bytes_left(&gb) * 8);
{
OPEN_READER(re, &s->gb);
if (!s->codebook) {
while (1) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, s->table_9_rl_vlc,
VLC_BITS, 3, 1);

/* escape */
if (level == 64)
break;

count += run;

if (count > expected)
break;

coeff = dequant_and_decompand(level, s->quantisation);
for (i = 0; i < run; i++)
*coeff_data++ = coeff;
}
} else {
while (1) {
UPDATE_CACHE(re, &s->gb);
GET_RL_VLC(level, run, re, &s->gb, s->table_18_rl_vlc,
VLC_BITS, 3, 1);

/* escape */
if (level == 255 && run == 2)
break;

count += run;

if (count > expected)
break;

coeff = dequant_and_decompand(level, s->quantisation);
for (i = 0; i < run; i++)
*coeff_data++ = coeff;
}
}
CLOSE_READER(re, &s->gb);
}

if (count > expected) {
av_log(avctx, AV_LOG_ERROR, "Escape codeword not found, probably corrupt data\n");
ret = AVERROR(EINVAL);
goto end;
}

bytes = FFALIGN(FF_CEIL_RSHIFT(get_bits_count(&s->gb), 3), 4);
if (bytes > bytestream2_get_bytes_left(&gb)) {
av_log(avctx, AV_LOG_ERROR, "Bitstream overread error\n");
ret = AVERROR(EINVAL);
goto end;
} else
bytestream2_seek(&gb, bytes, SEEK_CUR);

av_log(avctx, AV_LOG_DEBUG, "End subband coeffs %i extra %i\n", count, count - expected);
s->codebook = 0;

/* Copy last line of coefficients if odd height */
if (highpass_height & 1) {
memcpy(&coeff_data[highpass_height * highpass_stride],
&coeff_data[(highpass_height - 1) * highpass_stride],
highpass_stride * sizeof(*coeff_data));
}
}
}

if (!s->a_width || !s->a_height || s->coded_width || s->coded_height) {
av_log(avctx, AV_LOG_ERROR, "Invalid dimensions\n");
ret = AVERROR(EINVAL);
goto end;
}

for (plane = 0; plane < 3 && !ret; plane++) {
/* level 1 */
int lowpass_height = s->plane[plane].band[0][0].height;
int lowpass_width = s->plane[plane].band[0][0].width;
int highpass_stride = s->plane[plane].band[0][1].stride;
int act_plane = plane == 1 ? 2 : plane == 2 ? 1 : 0;
int16_t *low, *high, *output, *dst;

if (lowpass_height > s->plane[plane].band[0][0].a_height || lowpass_width > s->plane[plane].band[0][0].a_width ||
!highpass_stride || s->plane[plane].band[0][1].width > s->plane[plane].band[0][1].a_width) {
av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
ret = AVERROR(EINVAL);
goto end;
}

av_log(avctx, AV_LOG_DEBUG, "Decoding level 1 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

low = s->plane[plane].subband[0];
high = s->plane[plane].subband[2];
output = s->plane[plane].l_h[0];
for (i = 0; i < lowpass_width; i++) {
vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
low++;
high++;
output++;
}

low = s->plane[plane].subband[1];
high = s->plane[plane].subband[3];
output = s->plane[plane].l_h[1];

for (i = 0; i < lowpass_width; i++) {
// note the stride of "low" is highpass_stride
vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
low++;
high++;
output++;
}

low = s->plane[plane].l_h[0];
high = s->plane[plane].l_h[1];
output = s->plane[plane].subband[0];
for (i = 0; i < lowpass_height * 2; i++) {
horiz_filter(output, low, high, lowpass_width);
low += lowpass_width;
high += lowpass_width;
output += lowpass_width * 2;
}
if (avctx->pix_fmt == AV_PIX_FMT_GBRP12) {
output = s->plane[plane].subband[0];
for (i = 0; i < lowpass_height * 2; i++) {
for (j = 0; j < lowpass_width * 2; j++)
output[j] <<= 2;

output += lowpass_width * 2;
}
}

/* level 2 */
lowpass_height = s->plane[plane].band[1][1].height;
lowpass_width = s->plane[plane].band[1][1].width;
highpass_stride = s->plane[plane].band[1][1].stride;

if (lowpass_height > s->plane[plane].band[1][1].a_height || lowpass_width > s->plane[plane].band[1][1].a_width ||
!highpass_stride || s->plane[plane].band[1][1].width > s->plane[plane].band[1][1].a_width) {
av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
ret = AVERROR(EINVAL);
goto end;
}

av_log(avctx, AV_LOG_DEBUG, "Level 2 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

low = s->plane[plane].subband[0];
high = s->plane[plane].subband[5];
output = s->plane[plane].l_h[3];
for (i = 0; i < lowpass_width; i++) {
vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
low++;
high++;
output++;
}

low = s->plane[plane].subband[4];
high = s->plane[plane].subband[6];
output = s->plane[plane].l_h[4];
for (i = 0; i < lowpass_width; i++) {
vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
low++;
high++;
output++;
}

low = s->plane[plane].l_h[3];
high = s->plane[plane].l_h[4];
output = s->plane[plane].subband[0];
for (i = 0; i < lowpass_height * 2; i++) {
horiz_filter(output, low, high, lowpass_width);
low += lowpass_width;
high += lowpass_width;
output += lowpass_width * 2;
}

output = s->plane[plane].subband[0];
for (i = 0; i < lowpass_height * 2; i++) {
for (j = 0; j < lowpass_width * 2; j++)
output[j] <<= 2;

output += lowpass_width * 2;
}

/* level 3 */
lowpass_height = s->plane[plane].band[2][1].height;
lowpass_width = s->plane[plane].band[2][1].width;
highpass_stride = s->plane[plane].band[2][1].stride;

if (lowpass_height > s->plane[plane].band[2][1].a_height || lowpass_width > s->plane[plane].band[2][1].a_width ||
!highpass_stride || s->plane[plane].band[2][1].width > s->plane[plane].band[2][1].a_width) {
av_log(avctx, AV_LOG_ERROR, "Invalid plane dimensions\n");
ret = AVERROR(EINVAL);
goto end;
}

av_log(avctx, AV_LOG_DEBUG, "Level 3 plane %i %i %i %i\n", plane, lowpass_height, lowpass_width, highpass_stride);

low = s->plane[plane].subband[0];
high = s->plane[plane].subband[8];
output = s->plane[plane].l_h[6];
for (i = 0; i < lowpass_width; i++) {
vert_filter(output, lowpass_width, low, lowpass_width, high, highpass_stride, lowpass_height);
low++;
high++;
output++;
}

low = s->plane[plane].subband[7];
high = s->plane[plane].subband[9];
output = s->plane[plane].l_h[7];
for (i = 0; i < lowpass_width; i++) {
vert_filter(output, lowpass_width, low, highpass_stride, high, highpass_stride, lowpass_height);
low++;
high++;
output++;
}

dst = (int16_t *)pic->data[act_plane];
low = s->plane[plane].l_h[6];
high = s->plane[plane].l_h[7];
for (i = 0; i < lowpass_height * 2; i++) {
horiz_filter_clip(dst, low, high, lowpass_width, s->bpc);
low += lowpass_width;
high += lowpass_width;
dst += pic->linesize[act_plane] / 2;
}
}


end:
if (ret < 0)
return ret;

*got_frame = 1;
return avpkt->size;
}

static av_cold int cfhd_close_decoder(AVCodecContext *avctx)
{
CFHDContext *s = avctx->priv_data;

free_buffers(avctx);

if (!avctx->internal->is_copy) {
ff_free_vlc(&s->vlc_9);
ff_free_vlc(&s->vlc_18);
}

return 0;
}

AVCodec ff_cfhd_decoder = {
.name = "cfhd",
.long_name = NULL_IF_CONFIG_SMALL("Cineform HD"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_CFHD,
.priv_data_size = sizeof(CFHDContext),
.init = cfhd_decode_init,
.close = cfhd_close_decoder,
.decode = cfhd_decode,
.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
};

+ 112
- 0
libavcodec/cfhd.h View File

@@ -0,0 +1,112 @@
/*
* Copyright (c) 2015 Kieran Kunhya
*
* 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_CFHD_H
#define AVCODEC_CFHD_H

#include <stdint.h>

#include "libavutil/avassert.h"

#include "avcodec.h"
#include "get_bits.h"

#define VLC_BITS 9
#define NB_VLC_TABLE_9 (71+3)
#define NB_VLC_TABLE_18 (263+1)

typedef struct CFHD_RL_VLC_ELEM {
int16_t level;
int8_t len;
uint16_t run;
} CFHD_RL_VLC_ELEM;

#define DWT_LEVELS 3

typedef struct SubBand {
int level;
int orientation;
int stride;
int a_width;
int width;
int a_height;
int height;
int pshift;
int quant;
uint8_t *ibuf;
} SubBand;

typedef struct Plane {
int width;
int height;
ptrdiff_t stride;

int16_t *idwt_buf;
int16_t *idwt_tmp;

/* TODO: merge this into SubBand structure */
int16_t *subband[10];
int16_t *l_h[8];

SubBand band[DWT_LEVELS][4];
} Plane;

typedef struct CFHDContext {
AVCodecContext *avctx;

CFHD_RL_VLC_ELEM table_9_rl_vlc[2088];
VLC vlc_9;

CFHD_RL_VLC_ELEM table_18_rl_vlc[4572];
VLC vlc_18;

GetBitContext gb;

int chroma_x_shift;
int chroma_y_shift;

int coded_width;
int coded_height;

int a_width;
int a_height;

int bpc;
int channel_cnt;
int subband_cnt;
int channel_num;
uint8_t lowpass_precision;
uint16_t quantisation;
int wavelet_depth;
int pshift;

int codebook;
int subband_num;
int level;
int subband_num_actual;

uint8_t prescale_shift[3];
Plane plane[4];

} CFHDContext;

int ff_cfhd_init_vlcs(CFHDContext *s);

#endif /* AVCODEC_CFHD_H */

+ 323
- 0
libavcodec/cfhddata.c View File

@@ -0,0 +1,323 @@
/*
* Copyright (c) 2015 Kieran Kunhya
*
* 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
*/

#include "stdint.h"
#include "cfhd.h"

/* some special codewords, not sure what they all mean */
#define TABLE_9_BAND_END1 0x1C7859Eh
#define TABLE_9_BAND_END_LEN1 25
#define TABLE_9_BAND_END2 0x38F0B3Fh
#define TABLE_9_BAND_END_LEN2 26
#define TABLE_9_BAND_END3 0x38F0B3Eh
#define TABLE_9_BAND_END_LEN3 26

static const uint8_t table_9_vlc_len[NB_VLC_TABLE_9] = {
1, 2, 4, 5, 5, 5, 6, 6,
6, 7, 7, 8, 8, 8, 8, 9,
9, 9, 9, 9, 10, 10, 11, 11,
11, 11, 12, 12, 12, 12, 13, 13,
13, 14, 14, 14, 14, 14, 14, 15,
15, 15, 15, 16, 16, 16, 16, 17,
17, 17, 17, 17, 18, 18, 18, 19,
19, 19, 20, 20, 20, 20, 20, 22,
23, 23, 23, 23, 24, 24, 24, 25,
26, 26,
};

static const uint32_t table_9_vlc_bits[NB_VLC_TABLE_9] = {
0, 0x2, 0xc, 0x1a, 0x1d, 0x1e, 0x39, 0x3e,
0x37, 0x7e, 0x6c, 0xe2, 0xfe, 0xdb, 0xe0, 0x1c3,
0x1c6, 0x1ff, 0x1fe, 0x1b5, 0x369, 0x385, 0x71d, 0x6d0,
0x708, 0x71f, 0xe3d, 0xe39, 0xe13, 0xe12, 0x1c71, 0x1b45,
0x1b47, 0x3689, 0x38f2, 0x38e1, 0x38e0, 0x38f1, 0x3688, 0x6d1b,
0x71e0, 0x6d19, 0x71e7, 0xe3cd, 0xda35, 0xda30, 0xe3c3, 0x1b469,
0x1b462, 0x1c798, 0x1b463, 0x1c799, 0x38f08, 0x38f09, 0x38f0a, 0x6d1a0,
0x6d1a3, 0x6d1a1, 0xda345, 0xda344, 0xe3c2d, 0xe3c2f, 0xe3c2e, 0x38f0b2,
0x71e160, 0x71e162, 0x71e166, 0x71e161, 0xe3c2ce, 0xe3c2c6, 0xe3c2c7, 0x1C7859E,
0x38F0B3F, 0x38F0B3E,
};

static const uint16_t table_9_vlc_run[NB_VLC_TABLE_9] = {
1, 1, 1, 1, 12, 1, 32, 160,
1, 1, 1, 320, 1, 1, 80, 120,
1, 1, 100, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1
};

static const uint8_t table_9_vlc_level[NB_VLC_TABLE_9] = {
0, 1, 2, 3, 0, 4, 0, 0,
5, 7, 6, 0, 9, 8, 0, 0,
11, 12, 0, 10, 13, 14, 17, 15,
16, 18, 22, 21, 20, 19, 25, 23,
24, 27, 31, 29, 28, 30, 26, 33,
34, 32, 35, 39, 37, 36, 38, 42,
40, 43, 41, 44, 45, 46, 47, 48,
50, 49, 52, 51, 53, 55, 54, 56,
57, 59, 60, 58, 61, 62, 63, 64,
64, 64,
};

static const uint32_t table_18_vlc_bits[NB_VLC_TABLE_18] = {
0, 0x2, 0x7, 0x19, 0x30, 0x36, 0x6f, 0x63,
0x69, 0x6b, 0xd1, 0xd4, 0xdc, 0x189, 0x18a, 0x1a0,
0x1ab, 0x377, 0x310, 0x316, 0x343, 0x354, 0x375, 0x623,
0x684, 0x685, 0x6ab, 0x6ec, 0xddb, 0xc5c, 0xc5e, 0xc44,
0xd55, 0xdd1, 0xdd3, 0x1bb5, 0x188b, 0x18bb, 0x18bf, 0x1aa8,
0x1ba0, 0x1ba5, 0x1ba4, 0x3115, 0x3175, 0x317d, 0x3553, 0x3768,
0x6e87, 0x6ed3, 0x62e8, 0x62f8, 0x6228, 0x6aa4, 0x6e85, 0xc453,
0xc5d3, 0xc5f3, 0xdda4, 0xdd08, 0xdd0c, 0x1bb4b, 0x1bb4a, 0x18ba5,
0x18be5, 0x1aa95, 0x1aa97, 0x188a4, 0x1ba13, 0x31748, 0x317c8, 0x35528,
0x3552c, 0x37424, 0x37434, 0x37436, 0x62294, 0x62e92, 0x62f92, 0x6aa52,
0x6aa5a, 0x6e86a, 0x6e86e, 0x6e84a, 0xc452a, 0xc5d27, 0xc5f26, 0xd54a6,
0xd54b6, 0xdd096, 0xdd0d6, 0xdd0de, 0x188a56, 0x18ba4d, 0x18be4e, 0x18be4f,
0x1aa96e, 0x1ba12e, 0x1ba12f, 0x1ba1af, 0x1ba1bf, 0x37435d, 0x37437d, 0x317498,
0x35529c, 0x35529d, 0x3552de, 0x3552df, 0x62e933, 0x62295d, 0x6aa53d, 0x6aa53f,
0x6aa53e, 0x6e86b9, 0x6e86f8, 0xd54a79, 0xc5d265, 0xc452b8, 0xdd0d71, 0xd54a78,
0xdd0d70, 0xdd0df2, 0xdd0df3, 0x188a5f6, 0x188a5f5, 0x188a5f4, 0x188a5f3, 0x188a5f2,
0x188a5f1, 0x188a5f0, 0x188a5ef, 0x188a5ee, 0x188a5ed, 0x188a5aa, 0x188a5e3, 0x188a5df,
0x188a589, 0x188a5dd, 0x188a578, 0x188a5e0, 0x188a588, 0x188a5d6, 0x188a5db, 0x188a5e1,
0x188a587, 0x188a59a, 0x188a5c4, 0x188a5ec, 0x188a586, 0x188a573, 0x188a59c, 0x188a5c8,
0x188a5fb, 0x188a5a1, 0x188a5eb, 0x188a5a8, 0x188a584, 0x188a5d2, 0x188a599, 0x188a598,
0x188a583, 0x18ba4c9, 0x188a5d0, 0x188a594, 0x188a582, 0x188a5cb, 0x188a5d8, 0x188a5e7,
0x188a581, 0x188a5ea, 0x188a5a9, 0x188a5a6, 0x188a580, 0x188a5a0, 0x188a59d, 0x188a5c3,
0x188a57f, 0x188a5c0, 0x188a5de, 0x188a5d4, 0x188a57e, 0x188a5c2, 0x188a592, 0x188a5cd,
0x188a57d, 0x188a5a3, 0x188a5e8, 0x188a5a2, 0x188a57c, 0x188a58e, 0x188a5b3, 0x188a5b2,
0x188a5b1, 0x188a5b0, 0x188a5af, 0x188a5ae, 0x188a5ad, 0x188a5ac, 0x188a5ab, 0x188a5da,
0x188a5e4, 0x188a5e5, 0x188a5d9, 0x188a5b5, 0x188a5bc, 0x188a5bd, 0x188a5e9, 0x188a5cc,
0x188a585, 0x188a5d3, 0x188a5e2, 0x188a595, 0x188a596, 0x188a5b8, 0x188a590, 0x188a5c9,
0x188a5a4, 0x188a5e6, 0x188a5a5, 0x188a5ce, 0x188a5bf, 0x188a572, 0x188a59b, 0x188a5be,
0x188a5c7, 0x188a5ca, 0x188a5d5, 0x188a57b, 0x188a58d, 0x188a58c, 0x188a58b, 0x188a58a,
0x18ba4c8, 0x188a5c5, 0x188a5fa, 0x188a5bb, 0x188a5c1, 0x188a5cf, 0x188a5b9, 0x188a5b6,
0x188a597, 0x188a5fe, 0x188a5d7, 0x188a5ba, 0x188a591, 0x188a5c6, 0x188a5dc, 0x188a57a,
0x188a59f, 0x188a5f9, 0x188a5b4, 0x188a5a7, 0x188a58f, 0x188a5fd, 0x188a5b7, 0x188a593,
0x188a59e, 0x188a5f8, 0x188a5ff, 0x188a5fc, 0x188a579, 0x188a5f7, 0x3114ba2, 0x3114ba3,
};

static const uint8_t table_18_vlc_len[NB_VLC_TABLE_18] = {
1, 2, 3, 5, 6, 6, 7, 7,
7, 7, 8, 8, 8, 9, 9, 9,
9, 10, 10, 10, 10, 10, 10, 11,
11, 11, 11, 11, 12, 12, 12, 12,
12, 12, 12, 13, 13, 13, 13, 13,
13, 13, 13, 14, 14, 14, 14, 14,
15, 15, 15, 15, 15, 15, 15, 16,
16, 16, 16, 16, 16, 17, 17, 17,
17, 17, 17, 17, 17, 18, 18, 18,
18, 18, 18, 18, 19, 19, 19, 19,
19, 19, 19, 19, 20, 20, 20, 20,
20, 20, 20, 20, 21, 21, 21, 21,
21, 21, 21, 21, 21, 22, 22, 22,
22, 22, 22, 22, 23, 23, 23, 23,
23, 23, 23, 24, 24, 24, 24, 24,
24, 24, 24, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 25, 25,
25, 25, 25, 25, 25, 25, 26, 26,
};

static const uint16_t table_18_vlc_run[NB_VLC_TABLE_18] = {
1, 1, 1, 1, 1, 1, 1, 1,
12, 1, 20, 1, 1, 1, 32, 1,
1, 1, 1, 1, 60, 1, 1, 1,
1, 100, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 180, 1,
1, 320, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 2,
};

static const uint8_t table_18_vlc_level[NB_VLC_TABLE_18] = {
0, 1, 2, 3, 4, 5, 8, 6,
0, 7, 0, 9, 10, 11, 0, 12,
13, 18, 14, 15, 0, 16, 17, 19,
20, 0, 21, 22, 29, 24, 25, 23,
26, 27, 28, 35, 30, 31, 0, 32,
33, 0, 34, 36, 37, 38, 39, 40,
46, 47, 42, 43, 41, 44, 45, 48,
49, 50, 53, 51, 52, 61, 60, 55,
56, 57, 58, 54, 59, 62, 63, 64,
65, 66, 67, 68, 69, 70, 71, 72,
73, 75, 76, 74, 77, 78, 79, 80,
81, 82, 83, 84, 85, 86, 87, 88,
89, 90, 91, 92, 93, 99, 100, 94,
95, 96, 97, 98, 102, 101, 103, 105,
104, 106, 107, 111, 109, 108, 113, 110,
112, 114, 115, 225, 189, 188, 203, 202,
197, 207, 169, 223, 159, 235, 152, 192,
179, 201, 172, 149, 178, 120, 219, 150,
127, 211, 125, 158, 247, 238, 163, 228,
183, 217, 168, 122, 128, 249, 187, 186,
136, 181, 255, 230, 135, 233, 222, 145,
134, 167, 248, 209, 243, 216, 164, 140,
157, 239, 191, 251, 156, 139, 242, 133,
162, 213, 165, 212, 227, 198, 236, 234,
117, 215, 124, 123, 254, 253, 148, 218,
146, 147, 224, 143, 184, 185, 166, 132,
129, 250, 151, 119, 193, 176, 245, 229,
206, 144, 208, 137, 241, 237, 190, 240,
131, 232, 252, 171, 205, 204, 118, 214,
180, 126, 182, 175, 141, 138, 177, 153,
194, 160, 121, 174, 246, 130, 200, 170,
221, 196, 142, 210, 199, 155, 154, 244,
220, 195, 161, 231, 173, 226, 116, 255,
};

av_cold int ff_cfhd_init_vlcs(CFHDContext *s)
{
int i, j, ret = 0;
uint32_t new_cfhd_vlc_bits[NB_VLC_TABLE_18 * 2];
uint8_t new_cfhd_vlc_len[NB_VLC_TABLE_18 * 2];
uint16_t new_cfhd_vlc_run[NB_VLC_TABLE_18 * 2];
int16_t new_cfhd_vlc_level[NB_VLC_TABLE_18 * 2];

/** Similar to dv.c, generate signed VLC tables **/

/* Table 9 */
for (i = 0, j = 0; i < NB_VLC_TABLE_9; i++, j++) {
new_cfhd_vlc_bits[j] = table_9_vlc_bits[i];
new_cfhd_vlc_len[j] = table_9_vlc_len[i];
new_cfhd_vlc_run[j] = table_9_vlc_run[i];
new_cfhd_vlc_level[j] = table_9_vlc_level[i];

/* Don't include the zero level nor escape bits */
if (table_9_vlc_level[i] &&
new_cfhd_vlc_bits[j] != table_9_vlc_bits[NB_VLC_TABLE_9-1]) {
new_cfhd_vlc_bits[j] <<= 1;
new_cfhd_vlc_len[j]++;
j++;
new_cfhd_vlc_bits[j] = (table_9_vlc_bits[i] << 1) | 1;
new_cfhd_vlc_len[j] = table_9_vlc_len[i] + 1;
new_cfhd_vlc_run[j] = table_9_vlc_run[i];
new_cfhd_vlc_level[j] = -table_9_vlc_level[i];
}
}

ret = init_vlc(&s->vlc_9, VLC_BITS, j, new_cfhd_vlc_len,
1, 1, new_cfhd_vlc_bits, 4, 4, 0);
if (ret < 0)
return ret;
for (i = 0; i < s->vlc_9.table_size; i++) {
int code = s->vlc_9.table[i][0];
int len = s->vlc_9.table[i][1];
int level, run;

if (len < 0) { // more bits needed
run = 0;
level = code;
} else {
run = new_cfhd_vlc_run[code];
level = new_cfhd_vlc_level[code];
}
s->table_9_rl_vlc[i].len = len;
s->table_9_rl_vlc[i].level = level;
s->table_9_rl_vlc[i].run = run;
}

/* Table 18 */
for (i = 0, j = 0; i < NB_VLC_TABLE_18; i++, j++) {
new_cfhd_vlc_bits[j] = table_18_vlc_bits[i];
new_cfhd_vlc_len[j] = table_18_vlc_len[i];
new_cfhd_vlc_run[j] = table_18_vlc_run[i];
new_cfhd_vlc_level[j] = table_18_vlc_level[i];

/* Don't include the zero level nor escape bits */
if (table_18_vlc_level[i] &&
new_cfhd_vlc_bits[j] != table_18_vlc_bits[NB_VLC_TABLE_18-1]) {
new_cfhd_vlc_bits[j] <<= 1;
new_cfhd_vlc_len[j]++;
j++;
new_cfhd_vlc_bits[j] = (table_18_vlc_bits[i] << 1) | 1;
new_cfhd_vlc_len[j] = table_18_vlc_len[i] + 1;
new_cfhd_vlc_run[j] = table_18_vlc_run[i];
new_cfhd_vlc_level[j] = -table_18_vlc_level[i];
}
}

ret = init_vlc(&s->vlc_18, VLC_BITS, j, new_cfhd_vlc_len,
1, 1, new_cfhd_vlc_bits, 4, 4, 0);
if (ret < 0)
return ret;
av_assert0(s->vlc_18.table_size == 4572);

for (i = 0; i < s->vlc_18.table_size; i++) {
int code = s->vlc_18.table[i][0];
int len = s->vlc_18.table[i][1];
int level, run;

if (len < 0) { // more bits needed
run = 0;
level = code;
} else {
run = new_cfhd_vlc_run[code];
level = new_cfhd_vlc_level[code];
}
s->table_18_rl_vlc[i].len = len;
s->table_18_rl_vlc[i].level = level;
s->table_18_rl_vlc[i].run = run;
}

return ret;
}

+ 7
- 0
libavcodec/codec_desc.c View File

@@ -1521,6 +1521,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
.props = AV_CODEC_PROP_LOSSLESS,
.mime_types= MT("image/png"),
},
{
.id = AV_CODEC_ID_CFHD,
.type = AVMEDIA_TYPE_VIDEO,
.name = "cfhd",
.long_name = NULL_IF_CONFIG_SMALL("Cineform HD"),
.props = AV_CODEC_PROP_LOSSY,
},

/* various PCM "codecs" */
{


+ 1
- 0
libavformat/riff.c View File

@@ -413,6 +413,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
{ AV_CODEC_ID_SCREENPRESSO, MKTAG('S', 'P', 'V', '1') },
{ AV_CODEC_ID_RSCC, MKTAG('R', 'S', 'C', 'C') },
{ AV_CODEC_ID_RSCC, MKTAG('I', 'S', 'C', 'C') },
{ AV_CODEC_ID_CFHD, MKTAG('C', 'F', 'H', 'D') },
{ AV_CODEC_ID_NONE, 0 }
};



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