Beam Software SIFF demuxer and video decoder

Originally committed as revision 10833 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Kostya Shishkov 17 years ago
parent 4e745a3b28
commit 66f7679c62
  1. 1
      Changelog
  2. 2
      MAINTAINERS
  3. 2
      doc/general.texi
  4. 1
      libavcodec/Makefile
  5. 1
      libavcodec/allcodecs.c
  6. 5
      libavcodec/avcodec.h
  7. 282
      libavcodec/vb.c
  8. 1
      libavformat/Makefile
  9. 1
      libavformat/allformats.c
  10. 4
      libavformat/avformat.h
  11. 238
      libavformat/siff.c

@ -100,6 +100,7 @@ version <next>
- DNxHD encoder - DNxHD encoder
- H.264 PAFF decoding - H.264 PAFF decoding
- Nellymoser ASAO decoder - Nellymoser ASAO decoder
- Beam Software SIFF demuxer and decoder
version 0.4.9-pre1: version 0.4.9-pre1:

@ -177,6 +177,7 @@ Codecs:
tscc.c Kostya Shishkov tscc.c Kostya Shishkov
txd.c Ivo van Poorten txd.c Ivo van Poorten
ulti* Kostya Shishkov ulti* Kostya Shishkov
vb.c Kostya Shishkov
vc1* Kostya Shishkov vc1* Kostya Shishkov
vcr1.c Michael Niedermayer vcr1.c Michael Niedermayer
vmnc.c Kostya Shishkov vmnc.c Kostya Shishkov
@ -245,6 +246,7 @@ Muxers/Demuxers:
rtsp.c Luca Barbato rtsp.c Luca Barbato
sdp.c Luca Abeni sdp.c Luca Abeni
segafilm.c Mike Melanson segafilm.c Mike Melanson
siff.c Kostya Shishkov
swf.c Baptiste Coudurier swf.c Baptiste Coudurier
txd.c Ivo van Poorten txd.c Ivo van Poorten
v4l2.c Luca Abeni v4l2.c Luca Abeni

@ -117,6 +117,8 @@ different game cutscenes repacked for use with ScummVM.
@item CRYO APC @tab @tab X @item CRYO APC @tab @tab X
@tab Audio format used in some games by CRYO Interactive Entertainment. @tab Audio format used in some games by CRYO Interactive Entertainment.
@item Monkey's Audio @tab @tab X @item Monkey's Audio @tab @tab X
@item SIFF @tab @tab X
@tab Audio and video format used in some games by Beam Software
@end multitable @end multitable
@code{X} means that encoding (resp. decoding) is supported. @code{X} means that encoding (resp. decoding) is supported.

@ -186,6 +186,7 @@ OBJS-$(CONFIG_TSCC_DECODER) += tscc.o
OBJS-$(CONFIG_TTA_DECODER) += tta.o OBJS-$(CONFIG_TTA_DECODER) += tta.o
OBJS-$(CONFIG_TXD_DECODER) += txd.o s3tc.o OBJS-$(CONFIG_TXD_DECODER) += txd.o s3tc.o
OBJS-$(CONFIG_ULTI_DECODER) += ulti.o OBJS-$(CONFIG_ULTI_DECODER) += ulti.o
OBJS-$(CONFIG_VB_DECODER) += vb.o
OBJS-$(CONFIG_VC1_DECODER) += vc1.o vc1data.o vc1dsp.o msmpeg4data.o OBJS-$(CONFIG_VC1_DECODER) += vc1.o vc1data.o vc1dsp.o msmpeg4data.o
OBJS-$(CONFIG_VCR1_DECODER) += vcr1.o OBJS-$(CONFIG_VCR1_DECODER) += vcr1.o
OBJS-$(CONFIG_VCR1_ENCODER) += vcr1.o OBJS-$(CONFIG_VCR1_ENCODER) += vcr1.o

@ -150,6 +150,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (TSCC, tscc); REGISTER_DECODER (TSCC, tscc);
REGISTER_DECODER (TXD, txd); REGISTER_DECODER (TXD, txd);
REGISTER_DECODER (ULTI, ulti); REGISTER_DECODER (ULTI, ulti);
REGISTER_DECODER (VB, vb);
REGISTER_DECODER (VC1, vc1); REGISTER_DECODER (VC1, vc1);
REGISTER_DECODER (VCR1, vcr1); REGISTER_DECODER (VCR1, vcr1);
REGISTER_DECODER (VMDVIDEO, vmdvideo); REGISTER_DECODER (VMDVIDEO, vmdvideo);

@ -33,8 +33,8 @@
#define AV_STRINGIFY(s) AV_TOSTRING(s) #define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s #define AV_TOSTRING(s) #s
#define LIBAVCODEC_VERSION_INT ((51<<16)+(46<<8)+1) #define LIBAVCODEC_VERSION_INT ((51<<16)+(47<<8)+0)
#define LIBAVCODEC_VERSION 51.46.1 #define LIBAVCODEC_VERSION 51.47.0
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT #define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION) #define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
@ -168,6 +168,7 @@ enum CodecID {
CODEC_ID_TXD, CODEC_ID_TXD,
CODEC_ID_VP6A, CODEC_ID_VP6A,
CODEC_ID_AMV, CODEC_ID_AMV,
CODEC_ID_VB,
/* various PCM "codecs" */ /* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000, CODEC_ID_PCM_S16LE= 0x10000,

@ -0,0 +1,282 @@
/*
* Beam Software VB decoder
* Copyright (c) 2007 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 vb.c
* VB Video decoder
*/
#include <stdio.h>
#include <stdlib.h>
#include "avcodec.h"
#include "bytestream.h"
enum VBFlags{
VB_HAS_GMC = 0x01,
VB_HAS_AUDIO = 0x04,
VB_HAS_VIDEO = 0x08,
VB_HAS_PALETTE = 0x10,
VB_HAS_LENGTH = 0x20
};
typedef struct VBDecContext {
AVCodecContext *avctx;
AVFrame pic;
uint8_t *frame, *prev_frame;
uint32_t pal[256];
uint8_t *stream;
} VBDecContext;
static const uint16_t vb_patterns[64] = {
0x0660, 0xFF00, 0xCCCC, 0xF000, 0x8888, 0x000F, 0x1111, 0xFEC8,
0x8CEF, 0x137F, 0xF731, 0xC800, 0x008C, 0x0013, 0x3100, 0xCC00,
0x00CC, 0x0033, 0x3300, 0x0FF0, 0x6666, 0x00F0, 0x0F00, 0x2222,
0x4444, 0xF600, 0x8CC8, 0x006F, 0x1331, 0x318C, 0xC813, 0x33CC,
0x6600, 0x0CC0, 0x0066, 0x0330, 0xF900, 0xC88C, 0x009F, 0x3113,
0x6000, 0x0880, 0x0006, 0x0110, 0xCC88, 0xFC00, 0x00CF, 0x88CC,
0x003F, 0x1133, 0x3311, 0xF300, 0x6FF6, 0x0603, 0x08C6, 0x8C63,
0xC631, 0x6310, 0xC060, 0x0136, 0x136C, 0x36C8, 0x6C80, 0x324C
};
static void vb_decode_palette(VBDecContext *c)
{
int start, size, i;
start = bytestream_get_byte(&c->stream);
size = (bytestream_get_byte(&c->stream) - 1) & 0xFF;
if(start + size > 255){
av_log(c->avctx, AV_LOG_ERROR, "Palette change runs beyond entry 256\n");
return;
}
for(i = start; i <= start + size; i++)
c->pal[i] = bytestream_get_be24(&c->stream);
}
static inline int check_pixel(uint8_t *buf, uint8_t *start, uint8_t *end)
{
return buf >= start && buf < end;
}
static inline int check_line(uint8_t *buf, uint8_t *start, uint8_t *end)
{
return buf >= start && (buf + 4) <= end;
}
static int vb_decode_framedata(VBDecContext *c, uint8_t *buf, int offset)
{
uint8_t *prev, *cur;
int blk, blocks, t, blk2;
int blocktypes = 0;
int x, y, a, b;
int pattype, pattern;
const int width = c->avctx->width;
uint8_t *pstart = c->prev_frame;
uint8_t *pend = c->prev_frame + width*c->avctx->height;
prev = c->prev_frame + offset;
cur = c->frame;
blocks = (c->avctx->width >> 2) * (c->avctx->height >> 2);
blk2 = 0;
for(blk = 0; blk < blocks; blk++){
if(!(blk & 3))
blocktypes = bytestream_get_byte(&buf);
switch(blocktypes & 0xC0){
case 0x00: //skip
for(y = 0; y < 4; y++)
if(check_line(prev + y*width, pstart, pend))
memcpy(cur + y*width, prev + y*width, 4);
else
memset(cur + y*width, 0, 4);
break;
case 0x40:
t = bytestream_get_byte(&buf);
if(!t){ //raw block
for(y = 0; y < 4; y++)
memcpy(cur + y*width, buf + y*4, 4);
buf += 16;
}else{ // motion compensation
x = ((t & 0xF)^8) - 8;
y = ((t >> 4) ^8) - 8;
t = x + y*width;
for(y = 0; y < 4; y++)
if(check_line(prev + t + y*width, pstart, pend))
memcpy(cur + y*width, prev + t + y*width, 4);
else
memset(cur + y*width, 0, 4);
}
break;
case 0x80: // fill
t = bytestream_get_byte(&buf);
for(y = 0; y < 4; y++)
memset(cur + y*width, t, 4);
break;
case 0xC0: // pattern fill
t = bytestream_get_byte(&buf);
pattype = t >> 6;
pattern = vb_patterns[t & 0x3F];
switch(pattype){
case 0:
a = bytestream_get_byte(&buf);
b = bytestream_get_byte(&buf);
for(y = 0; y < 4; y++)
for(x = 0; x < 4; x++, pattern >>= 1)
cur[x + y*width] = (pattern & 1) ? b : a;
break;
case 1:
pattern = ~pattern;
case 2:
a = bytestream_get_byte(&buf);
for(y = 0; y < 4; y++)
for(x = 0; x < 4; x++, pattern >>= 1)
if(pattern & 1 && check_pixel(prev + x + y*width, pstart, pend))
cur[x + y*width] = prev[x + y*width];
else
cur[x + y*width] = a;
break;
case 3:
av_log(c->avctx, AV_LOG_ERROR, "Invalid opcode seen @%d\n",blk);
return -1;
}
break;
}
blocktypes <<= 2;
cur += 4;
prev += 4;
blk2++;
if(blk2 == (width >> 2)){
blk2 = 0;
cur += width * 3;
prev += width * 3;
}
}
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8_t *buf, int buf_size)
{
VBDecContext * const c = avctx->priv_data;
uint8_t *outptr, *srcptr;
int i, j;
int flags;
uint32_t size;
int rest = buf_size;
int offset = 0;
c->stream = buf;
flags = bytestream_get_le16(&c->stream);
rest -= 2;
if(flags & VB_HAS_GMC){
i = (int16_t)bytestream_get_le16(&c->stream);
j = (int16_t)bytestream_get_le16(&c->stream);
offset = i + j * avctx->width;
rest -= 4;
}
if(flags & VB_HAS_VIDEO){
size = bytestream_get_le32(&c->stream);
if(size > rest){
av_log(avctx, AV_LOG_ERROR, "Frame size is too big\n");
return -1;
}
vb_decode_framedata(c, c->stream, offset);
c->stream += size - 4;
rest -= size;
}
if(flags & VB_HAS_PALETTE){
size = bytestream_get_le32(&c->stream);
if(size > rest){
av_log(avctx, AV_LOG_ERROR, "Palette size is too big\n");
return -1;
}
vb_decode_palette(c);
rest -= size;
}
memcpy(c->pic.data[1], c->pal, AVPALETTE_SIZE);
c->pic.palette_has_changed = flags & VB_HAS_PALETTE;
outptr = c->pic.data[0];
srcptr = c->frame;
for(i = 0; i < avctx->height; i++){
memcpy(outptr, srcptr, avctx->width);
srcptr += avctx->width;
outptr += c->pic.linesize[0];
}
FFSWAP(uint8_t*, c->frame, c->prev_frame);
*data_size = sizeof(AVFrame);
*(AVFrame*)data = c->pic;
/* always report that the buffer was completely consumed */
return buf_size;
}
static int decode_init(AVCodecContext *avctx)
{
VBDecContext * const c = avctx->priv_data;
c->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
if (avcodec_check_dimensions(avctx, avctx->width, avctx->height) < 0) {
return -1;
}
c->pic.reference = 1;
if(avctx->get_buffer(avctx, &c->pic) < 0){
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return -1;
}
c->frame = av_malloc( avctx->width * avctx->height);
c->prev_frame = av_malloc( avctx->width * avctx->height);
return 0;
}
static int decode_end(AVCodecContext *avctx)
{
VBDecContext *c = avctx->priv_data;
av_freep(&c->frame);
av_freep(&c->prev_frame);
if(c->pic.data[0])
avctx->release_buffer(avctx, &c->pic);
return 0;
}
AVCodec vb_decoder = {
"vb",
CODEC_TYPE_VIDEO,
CODEC_ID_VB,
sizeof(VBDecContext),
decode_init,
NULL,
decode_end,
decode_frame
};

@ -127,6 +127,7 @@ OBJS-$(CONFIG_RTSP_DEMUXER) += rtsp.o
OBJS-$(CONFIG_SDP_DEMUXER) += rtsp.o OBJS-$(CONFIG_SDP_DEMUXER) += rtsp.o
OBJS-$(CONFIG_SEGAFILM_DEMUXER) += segafilm.o OBJS-$(CONFIG_SEGAFILM_DEMUXER) += segafilm.o
OBJS-$(CONFIG_SHORTEN_DEMUXER) += raw.o OBJS-$(CONFIG_SHORTEN_DEMUXER) += raw.o
OBJS-$(CONFIG_SIFF_DEMUXER) += siff.o
OBJS-$(CONFIG_SMACKER_DEMUXER) += smacker.o OBJS-$(CONFIG_SMACKER_DEMUXER) += smacker.o
OBJS-$(CONFIG_SOL_DEMUXER) += sol.o raw.o OBJS-$(CONFIG_SOL_DEMUXER) += sol.o raw.o
OBJS-$(CONFIG_STR_DEMUXER) += psxstr.o OBJS-$(CONFIG_STR_DEMUXER) += psxstr.o

@ -147,6 +147,7 @@ void av_register_all(void)
#endif #endif
REGISTER_DEMUXER (SEGAFILM, segafilm); REGISTER_DEMUXER (SEGAFILM, segafilm);
REGISTER_DEMUXER (SHORTEN, shorten); REGISTER_DEMUXER (SHORTEN, shorten);
REGISTER_DEMUXER (SIFF, siff);
REGISTER_DEMUXER (SMACKER, smacker); REGISTER_DEMUXER (SMACKER, smacker);
REGISTER_DEMUXER (SOL, sol); REGISTER_DEMUXER (SOL, sol);
REGISTER_DEMUXER (STR, str); REGISTER_DEMUXER (STR, str);

@ -21,8 +21,8 @@
#ifndef FFMPEG_AVFORMAT_H #ifndef FFMPEG_AVFORMAT_H
#define FFMPEG_AVFORMAT_H #define FFMPEG_AVFORMAT_H
#define LIBAVFORMAT_VERSION_INT ((51<<16)+(16<<8)+1) #define LIBAVFORMAT_VERSION_INT ((51<<16)+(17<<8)+0)
#define LIBAVFORMAT_VERSION 51.16.1 #define LIBAVFORMAT_VERSION 51.17.0
#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT #define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION) #define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)

@ -0,0 +1,238 @@
/*
* Beam Software SIFF demuxer
* Copyright (c) 2007 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
*/
#include "avformat.h"
#include "riff.h"
enum SIFFTags{
TAG_SIFF = MKTAG('S', 'I', 'F', 'F'),
TAG_BODY = MKTAG('B', 'O', 'D', 'Y'),
TAG_VBHD = MKTAG('V', 'B', 'H', 'D'),
TAG_SHDR = MKTAG('S', 'H', 'D', 'R'),
TAG_VBV1 = MKTAG('V', 'B', 'V', '1'),
TAG_SOUN = MKTAG('S', 'O', 'U', 'N'),
};
enum VBFlags{
VB_HAS_GMC = 0x01,
VB_HAS_AUDIO = 0x04,
VB_HAS_VIDEO = 0x08,
VB_HAS_PALETTE = 0x10,
VB_HAS_LENGTH = 0x20
};
typedef struct SIFFContext{
int frames;
int cur_frame;
int rate;
int bits;
int block_align;
int has_video;
int has_audio;
int curstrm;
int pktsize;
int gmcsize;
int sndsize;
int flags;
uint8_t gmc[4];
}SIFFContext;
static int siff_probe(AVProbeData *p)
{
/* check file header */
if (AV_RL32(p->buf) == TAG_SIFF)
return AVPROBE_SCORE_MAX;
else
return 0;
}
static int create_audio_stream(AVFormatContext *s, SIFFContext *c)
{
AVStream *ast;
ast = av_new_stream(s, 0);
if (!ast)
return -1;
ast->codec->codec_type = CODEC_TYPE_AUDIO;
ast->codec->codec_id = CODEC_ID_PCM_U8;
ast->codec->channels = 1;
ast->codec->bits_per_sample = c->bits;
ast->codec->sample_rate = c->rate;
ast->codec->frame_size = c->block_align;
av_set_pts_info(ast, 16, 1, c->rate);
return 0;
}
static int siff_parse_vbv1(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb)
{
AVStream *st;
int width, height;
if (get_le32(pb) != TAG_VBHD){
av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
return -1;
}
if(get_be32(pb) != 32){
av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
return -1;
}
if(get_le16(pb) != 1){
av_log(s, AV_LOG_ERROR, "Incorrect header version\n");
return -1;
}
width = get_le16(pb);
height = get_le16(pb);
url_fskip(pb, 4);
c->frames = get_le16(pb);
if(!c->frames){
av_log(s, AV_LOG_ERROR, "File contains no frames ???\n");
return -1;
}
c->bits = get_le16(pb);
c->rate = get_le16(pb);
c->block_align = c->rate * (c->bits >> 3);
url_fskip(pb, 16); //zeroes
st = av_new_stream(s, 0);
if (!st)
return -1;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_VB;
st->codec->codec_tag = MKTAG('V', 'B', 'V', '1');
st->codec->width = width;
st->codec->height = height;
st->codec->pix_fmt = PIX_FMT_PAL8;
av_set_pts_info(st, 16, 1, 12);
c->cur_frame = 0;
c->has_video = 1;
c->has_audio = !!c->rate;
c->curstrm = -1;
if (c->has_audio && create_audio_stream(s, c) < 0)
return -1;
return 0;
}
static int siff_parse_soun(AVFormatContext *s, SIFFContext *c, ByteIOContext *pb)
{
if (get_le32(pb) != TAG_SHDR){
av_log(s, AV_LOG_ERROR, "Header chunk is missing\n");
return -1;
}
if(get_be32(pb) != 8){
av_log(s, AV_LOG_ERROR, "Header chunk size is incorrect\n");
return -1;
}
url_fskip(pb, 4); //unknown value
c->rate = get_le16(pb);
c->bits = get_le16(pb);
c->block_align = c->rate * (c->bits >> 3);
return create_audio_stream(s, c);
}
static int siff_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
ByteIOContext *pb = &s->pb;
SIFFContext *c = s->priv_data;
uint32_t tag;
if (get_le32(pb) != TAG_SIFF)
return -1;
url_fskip(pb, 4); //ignore size
tag = get_le32(pb);
if (tag != TAG_VBV1 && tag != TAG_SOUN){
av_log(s, AV_LOG_ERROR, "Not a VBV file\n");
return -1;
}
if (tag == TAG_VBV1 && siff_parse_vbv1(s, c, pb) < 0)
return -1;
if (tag == TAG_SOUN && siff_parse_soun(s, c, pb) < 0)
return -1;
if (get_le32(pb) != MKTAG('B', 'O', 'D', 'Y')){
av_log(s, AV_LOG_ERROR, "'BODY' chunk is missing\n");
return -1;
}
url_fskip(pb, 4); //ignore size
return 0;
}
static int siff_read_packet(AVFormatContext *s, AVPacket *pkt)
{
SIFFContext *c = s->priv_data;
int size, size2;
uint8_t *snddata;
if (c->has_video){
if (c->cur_frame >= c->frames)
return AVERROR(EIO);
if (c->curstrm == -1){
c->pktsize = get_le32(&s->pb) - 4;
c->flags = get_le16(&s->pb);
c->gmcsize = (c->flags & VB_HAS_GMC) ? 4 : 0;
if (c->gmcsize)
get_buffer(&s->pb, c->gmc, c->gmcsize);
c->sndsize = (c->flags & VB_HAS_AUDIO) ? get_le32(&s->pb): 0;
c->curstrm = !!(c->flags & VB_HAS_AUDIO);
}
if (!c->curstrm){
size = c->pktsize - c->sndsize;
if (av_new_packet(pkt, size) < 0)
return AVERROR(ENOMEM);
AV_WL16(pkt->data, c->flags);
if (c->gmcsize)
memcpy(pkt->data + 2, c->gmc, c->gmcsize);
get_buffer(&s->pb, pkt->data + 2 + c->gmcsize, size - c->gmcsize - 2);
pkt->stream_index = 0;
c->curstrm = -1;
}else{
if (av_get_packet(&s->pb, pkt, c->sndsize - 4) < 0)
return AVERROR(EIO);
pkt->stream_index = 1;
c->curstrm = 0;
}
if(!c->cur_frame || c->curstrm)
pkt->flags |= PKT_FLAG_KEY;
if (c->curstrm == -1)
c->cur_frame++;
}else{
size = av_get_packet(&s->pb, pkt, c->block_align);
if(size <= 0)
return AVERROR(EIO);
}
return pkt->size;
}
AVInputFormat siff_demuxer = {
"siff",
"Beam Software SIFF",
sizeof(SIFFContext),
siff_probe,
siff_read_header,
siff_read_packet,
.extensions = "vb,son"
};
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