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CDXL demuxer and decoder 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>
tags/n0.11
Paul B Mahol Diego Biurrun 14 years ago
parent
c1df37e59b
commit
dc4e57489f
11 changed files with 460 additions and 2 deletions
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  1. +1
    -0
      Changelog
  2. +4
    -0
      doc/general.texi
  3. +1
    -0
      libavcodec/Makefile
  4. +1
    -0
      libavcodec/allcodecs.c
  5. +1
    -0
      libavcodec/avcodec.h
  6. +278
    -0
      libavcodec/cdxl.c
  7. +1
    -1
      libavcodec/version.h
  8. +1
    -0
      libavformat/Makefile
  9. +1
    -0
      libavformat/allformats.c
  10. +170
    -0
      libavformat/cdxl.c
  11. +1
    -1
      libavformat/version.h

+ 1
- 0
Changelog View File

@@ -6,6 +6,7 @@ version <next>:
- XWD encoder and decoder
- Support for fragmentation in the mov/mp4 muxer
- ISMV (Smooth Streaming) muxer
- CDXL demuxer and decoder


version 0.8:


+ 4
- 0
doc/general.texi View File

@@ -131,6 +131,8 @@ library:
@tab Multimedia format used by Delphine Software games.
@item CD+G @tab @tab X
@tab Video format used by CD+G karaoke disks
@item Commodore CDXL @tab @tab X
@tab Amiga CD video format
@item Core Audio Format @tab @tab X
@tab Apple Core Audio Format
@item CRC testing format @tab X @tab
@@ -435,6 +437,8 @@ following image formats are supported:
@tab fourcc: CSCD
@item CD+G @tab @tab X
@tab Video codec for CD+G karaoke disks
@item CDXL @tab @tab X
@tab Amiga CD video codec
@item Chinese AVS video @tab E @tab X
@tab AVS1-P2, JiZhun profile, encoding through external library libxavs
@item Delphine Software International CIN video @tab @tab X


+ 1
- 0
libavcodec/Makefile View File

@@ -102,6 +102,7 @@ OBJS-$(CONFIG_C93_DECODER) += c93.o
OBJS-$(CONFIG_CAVS_DECODER) += cavs.o cavsdec.o cavsdsp.o \
mpeg12data.o mpegvideo.o
OBJS-$(CONFIG_CDGRAPHICS_DECODER) += cdgraphics.o
OBJS-$(CONFIG_CDXL_DECODER) += cdxl.o
OBJS-$(CONFIG_CINEPAK_DECODER) += cinepak.o
OBJS-$(CONFIG_CLJR_DECODER) += cljr.o
OBJS-$(CONFIG_CLJR_ENCODER) += cljr.o


+ 1
- 0
libavcodec/allcodecs.c View File

@@ -86,6 +86,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (C93, c93);
REGISTER_DECODER (CAVS, cavs);
REGISTER_DECODER (CDGRAPHICS, cdgraphics);
REGISTER_DECODER (CDXL, cdxl);
REGISTER_DECODER (CINEPAK, cinepak);
REGISTER_ENCDEC (CLJR, cljr);
REGISTER_DECODER (CSCD, cscd);


+ 1
- 0
libavcodec/avcodec.h View File

@@ -244,6 +244,7 @@ enum CodecID {
CODEC_ID_DXTORY,
CODEC_ID_V410,
CODEC_ID_XWD,
CODEC_ID_CDXL,

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


+ 278
- 0
libavcodec/cdxl.c View File

@@ -0,0 +1,278 @@
/*
* CDXL video decoder
* Copyright (c) 2011-2012 Paul B Mahol
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "libavutil/intreadwrite.h"
#include "libavutil/imgutils.h"
#include "avcodec.h"
#include "get_bits.h"

typedef struct {
AVCodecContext *avctx;
AVFrame frame;
int bpp;
const uint8_t *palette;
int palette_size;
const uint8_t *video;
int video_size;
uint8_t *new_video;
int new_video_size;
} CDXLVideoContext;

static av_cold int cdxl_decode_init(AVCodecContext *avctx)
{
CDXLVideoContext *c = avctx->priv_data;

avcodec_get_frame_defaults(&c->frame);
c->new_video_size = 0;
c->avctx = avctx;

return 0;
}

static void import_palette(CDXLVideoContext *c, uint32_t *new_palette)
{
int i;

for (i = 0; i < c->palette_size / 2; i++) {
unsigned rgb = AV_RB16(&c->palette[i * 2]);
unsigned r = ((rgb >> 8) & 0xF) * 0x11;
unsigned g = ((rgb >> 4) & 0xF) * 0x11;
unsigned b = (rgb & 0xF) * 0x11;
AV_WN32(&new_palette[i], (r << 16) | (g << 8) | b);
}
}

static void bitplanar2chunky(CDXLVideoContext *c, int width,
int linesize, uint8_t *out)
{
GetBitContext gb;
int x, y, plane;

init_get_bits(&gb, c->video, c->video_size * 8);
memset(out, 0, linesize * c->avctx->height);
for (plane = 0; plane < c->bpp; plane++)
for (y = 0; y < c->avctx->height; y++)
for (x = 0; x < width; x++)
out[linesize * y + x] |= get_bits1(&gb) << plane;
}

static void cdxl_decode_rgb(CDXLVideoContext *c)
{
uint32_t *new_palette = (uint32_t *)c->frame.data[1];
int padded_width = FFALIGN(c->avctx->width, 16);

import_palette(c, new_palette);
bitplanar2chunky(c, padded_width, c->frame.linesize[0], c->frame.data[0]);
}

static void cdxl_decode_ham6(CDXLVideoContext *c)
{
AVCodecContext *avctx = c->avctx;
uint32_t new_palette[16], r, g, b;
uint8_t *ptr, *out, index, op;
int x, y;

ptr = c->new_video;
out = c->frame.data[0];

import_palette(c, new_palette);
bitplanar2chunky(c, avctx->width, avctx->width, c->new_video);

for (y = 0; y < avctx->height; y++) {
r = new_palette[0] & 0xFF0000;
g = new_palette[0] & 0xFF00;
b = new_palette[0] & 0xFF;
for (x = 0; x < avctx->width; x++) {
index = *ptr++;
op = index >> 4;
index &= 15;
switch (op) {
case 0:
r = new_palette[index] & 0xFF0000;
g = new_palette[index] & 0xFF00;
b = new_palette[index] & 0xFF;
break;
case 1:
b = index * 0x11;
break;
case 2:
r = index * 0x11 << 16;
break;
case 3:
g = index * 0x11 << 8;
break;
}
AV_WN32(out + x * 3, r | g | b);
}
out += c->frame.linesize[0];
}
}

static void cdxl_decode_ham8(CDXLVideoContext *c)
{
AVCodecContext *avctx = c->avctx;
uint32_t new_palette[64], r, g, b;
uint8_t *ptr, *out, index, op;
int x, y;

ptr = c->new_video;
out = c->frame.data[0];

import_palette(c, new_palette);
bitplanar2chunky(c, avctx->width, avctx->width, c->new_video);

for (y = 0; y < avctx->height; y++) {
r = new_palette[0] & 0xFF0000;
g = new_palette[0] & 0xFF00;
b = new_palette[0] & 0xFF;
for (x = 0; x < avctx->width; x++) {
index = *ptr++;
op = index >> 6;
index &= 63;
switch (op) {
case 0:
r = new_palette[index] & 0xFF0000;
g = new_palette[index] & 0xFF00;
b = new_palette[index] & 0xFF;
break;
case 1:
b = (index << 2) | (b & 3);
break;
case 2:
r = (index << 18) | (r & (3 << 16));
break;
case 3:
g = (index << 10) | (g & (3 << 8));
break;
}
AV_WN32(out + x * 3, r | g | b);
}
out += c->frame.linesize[0];
}
}

static int cdxl_decode_frame(AVCodecContext *avctx, void *data,
int *data_size, AVPacket *pkt)
{
CDXLVideoContext *c = avctx->priv_data;
AVFrame * const p = &c->frame;
int ret, w, h, encoding, format, buf_size = pkt->size;
const uint8_t *buf = pkt->data;

if (buf_size < 32)
return AVERROR_INVALIDDATA;
encoding = buf[1] & 7;
format = buf[1] & 0xE0;
w = AV_RB16(&buf[14]);
h = AV_RB16(&buf[16]);
c->bpp = buf[19];
c->palette_size = AV_RB16(&buf[20]);
c->palette = buf + 32;
c->video = c->palette + c->palette_size;
c->video_size = buf_size - c->palette_size - 32;

if (c->palette_size > 512)
return AVERROR_INVALIDDATA;
if (buf_size < c->palette_size + 32)
return AVERROR_INVALIDDATA;
if (c->bpp < 1)
return AVERROR_INVALIDDATA;
if (c->bpp > 8) {
av_log_ask_for_sample(avctx, "unsupported pixel size: %d\n", c->bpp);
return AVERROR_PATCHWELCOME;
}
if (format) {
av_log_ask_for_sample(avctx, "unsupported pixel format: %d\n", format);
return AVERROR_PATCHWELCOME;
}

if ((ret = av_image_check_size(w, h, 0, avctx)) < 0)
return ret;
if (w != avctx->width || h != avctx->height)
avcodec_set_dimensions(avctx, w, h);

if (encoding == 0) {
if (c->video_size < FFALIGN(avctx->width, 16) *
avctx->height * c->bpp / 8)
return AVERROR_INVALIDDATA;
avctx->pix_fmt = PIX_FMT_PAL8;
} else if (encoding == 1 && (c->bpp == 6 || c->bpp == 8)) {
if (c->palette_size != (1 << (c->bpp - 1)))
return AVERROR_INVALIDDATA;
if (c->video_size < avctx->width * avctx->height * c->bpp / 8)
return AVERROR_INVALIDDATA;
avctx->pix_fmt = PIX_FMT_BGR24;
} else {
av_log_ask_for_sample(avctx, "unsupported encoding %d and bpp %d\n",
encoding, c->bpp);
return AVERROR_PATCHWELCOME;
}

if (p->data[0])
avctx->release_buffer(avctx, p);

p->reference = 0;
if ((ret = avctx->get_buffer(avctx, p)) < 0) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
p->pict_type = AV_PICTURE_TYPE_I;

if (encoding) {
av_fast_padded_malloc(&c->new_video, &c->new_video_size,
h * w + FF_INPUT_BUFFER_PADDING_SIZE);
if (!c->new_video)
return AVERROR(ENOMEM);
if (c->bpp == 8)
cdxl_decode_ham8(c);
else
cdxl_decode_ham6(c);
} else {
cdxl_decode_rgb(c);
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->frame;

return buf_size;
}

static av_cold int cdxl_decode_end(AVCodecContext *avctx)
{
CDXLVideoContext *c = avctx->priv_data;

av_free(c->new_video);
if (c->frame.data[0])
avctx->release_buffer(avctx, &c->frame);

return 0;
}

AVCodec ff_cdxl_decoder = {
.name = "cdxl",
.type = AVMEDIA_TYPE_VIDEO,
.id = CODEC_ID_CDXL,
.priv_data_size = sizeof(CDXLVideoContext),
.init = cdxl_decode_init,
.close = cdxl_decode_end,
.decode = cdxl_decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video"),
};

+ 1
- 1
libavcodec/version.h View File

@@ -21,7 +21,7 @@
#define AVCODEC_VERSION_H

#define LIBAVCODEC_VERSION_MAJOR 54
#define LIBAVCODEC_VERSION_MINOR 0
#define LIBAVCODEC_VERSION_MINOR 1
#define LIBAVCODEC_VERSION_MICRO 0

#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \


+ 1
- 0
libavformat/Makefile View File

@@ -55,6 +55,7 @@ OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o mov_chan.o \
OBJS-$(CONFIG_CAVSVIDEO_DEMUXER) += cavsvideodec.o rawdec.o
OBJS-$(CONFIG_CAVSVIDEO_MUXER) += rawenc.o
OBJS-$(CONFIG_CDG_DEMUXER) += cdg.o
OBJS-$(CONFIG_CDXL_DEMUXER) += cdxl.o
OBJS-$(CONFIG_CRC_MUXER) += crcenc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += daud.o
OBJS-$(CONFIG_DAUD_MUXER) += daud.o


+ 1
- 0
libavformat/allformats.c View File

@@ -76,6 +76,7 @@ void av_register_all(void)
REGISTER_DEMUXER (CAF, caf);
REGISTER_MUXDEMUX (CAVSVIDEO, cavsvideo);
REGISTER_DEMUXER (CDG, cdg);
REGISTER_DEMUXER (CDXL, cdxl);
REGISTER_MUXER (CRC, crc);
REGISTER_MUXDEMUX (DAUD, daud);
REGISTER_DEMUXER (DFA, dfa);


+ 170
- 0
libavformat/cdxl.c View File

@@ -0,0 +1,170 @@
/*
* CDXL demuxer
* Copyright (c) 2011-2012 Paul B Mahol
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

#include "libavutil/intreadwrite.h"
#include "libavutil/parseutils.h"
#include "libavutil/opt.h"
#include "avformat.h"
#include "internal.h"

#define CDXL_HEADER_SIZE 32

typedef struct CDXLDemuxContext {
AVClass *class;
int sample_rate;
char *framerate;
AVRational fps;
int read_chunk;
uint8_t header[CDXL_HEADER_SIZE];
int video_stream_index;
int audio_stream_index;
} CDXLDemuxContext;

static int cdxl_read_header(AVFormatContext *s)
{
CDXLDemuxContext *cdxl = s->priv_data;
int ret;

if ((ret = av_parse_video_rate(&cdxl->fps, cdxl->framerate)) < 0) {
av_log(s, AV_LOG_ERROR,
"Could not parse framerate: %s.\n", cdxl->framerate);
return ret;
}

cdxl->read_chunk = 0;
cdxl->video_stream_index = -1;
cdxl->audio_stream_index = -1;

s->ctx_flags |= AVFMTCTX_NOHEADER;

return 0;
}

static int cdxl_read_packet(AVFormatContext *s, AVPacket *pkt)
{
CDXLDemuxContext *cdxl = s->priv_data;
AVIOContext *pb = s->pb;
uint32_t current_size;
uint16_t audio_size, palette_size;
int32_t video_size;
int64_t pos;
int ret;

if (pb->eof_reached)
return AVERROR_EOF;

pos = avio_tell(pb);
if (!cdxl->read_chunk &&
avio_read(pb, cdxl->header, CDXL_HEADER_SIZE) != CDXL_HEADER_SIZE)
return AVERROR_EOF;
if (cdxl->header[0] != 1) {
av_log(s, AV_LOG_ERROR, "non-standard cdxl file\n");
return AVERROR_INVALIDDATA;
}

current_size = AV_RB32(&cdxl->header[2]);
palette_size = AV_RB16(&cdxl->header[20]);
audio_size = AV_RB16(&cdxl->header[22]);

if (palette_size > 512)
return AVERROR_INVALIDDATA;
if (current_size < audio_size + palette_size + CDXL_HEADER_SIZE)
return AVERROR_INVALIDDATA;
video_size = current_size - audio_size - CDXL_HEADER_SIZE;

if (cdxl->read_chunk && audio_size) {
if (cdxl->audio_stream_index == -1) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);

st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_tag = 0;
st->codec->codec_id = CODEC_ID_PCM_S8;
st->codec->channels = cdxl->header[1] & 0x10 ? 2 : 1;
st->codec->sample_rate = cdxl->sample_rate;
cdxl->audio_stream_index = st->index;
avpriv_set_pts_info(st, 32, 1, cdxl->sample_rate);
}

ret = av_get_packet(pb, pkt, audio_size);
if (ret < 0)
return ret;
pkt->stream_index = cdxl->audio_stream_index;
pkt->pos = pos;
pkt->duration = audio_size;
cdxl->read_chunk = 0;
} else {
if (cdxl->video_stream_index == -1) {
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);

st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_tag = 0;
st->codec->codec_id = CODEC_ID_CDXL;
st->codec->width = AV_RB16(&cdxl->header[14]);
st->codec->height = AV_RB16(&cdxl->header[16]);
cdxl->video_stream_index = st->index;
avpriv_set_pts_info(st, 63, cdxl->fps.den, cdxl->fps.num);
}

if (av_new_packet(pkt, video_size + CDXL_HEADER_SIZE) < 0)
return AVERROR(ENOMEM);
memcpy(pkt->data, cdxl->header, CDXL_HEADER_SIZE);
ret = avio_read(pb, pkt->data + CDXL_HEADER_SIZE, video_size);
if (ret < 0) {
av_free_packet(pkt);
return ret;
}
pkt->stream_index = cdxl->video_stream_index;
pkt->flags |= AV_PKT_FLAG_KEY;
pkt->pos = pos;
cdxl->read_chunk = audio_size;
}

return ret;
}

#define OFFSET(x) offsetof(CDXLDemuxContext, x)
static const AVOption cdxl_options[] = {
{ "sample_rate", "", OFFSET(sample_rate), AV_OPT_TYPE_INT, { .dbl = 11025 }, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, { .str = "10" }, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
};

static const AVClass cdxl_demuxer_class = {
.class_name = "CDXL demuxer",
.item_name = av_default_item_name,
.option = cdxl_options,
.version = LIBAVUTIL_VERSION_INT,
};

AVInputFormat ff_cdxl_demuxer = {
.name = "cdxl",
.long_name = NULL_IF_CONFIG_SMALL("Commodore CDXL video format"),
.priv_data_size = sizeof(CDXLDemuxContext),
.read_header = cdxl_read_header,
.read_packet = cdxl_read_packet,
.extensions = "cdxl,xl",
.flags = AVFMT_GENERIC_INDEX,
.priv_class = &cdxl_demuxer_class,
};

+ 1
- 1
libavformat/version.h View File

@@ -30,7 +30,7 @@
#include "libavutil/avutil.h"

#define LIBAVFORMAT_VERSION_MAJOR 54
#define LIBAVFORMAT_VERSION_MINOR 0
#define LIBAVFORMAT_VERSION_MINOR 1
#define LIBAVFORMAT_VERSION_MICRO 0

#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \


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