[FFmpeg-cvslog] r10833 - in trunk: Changelog MAINTAINERS doc/general.texi libavcodec/Makefile libavcodec/allcodecs.c libavcodec/avcodec.h libavcodec/vb.c libavformat/Makefile libavformat/allformats.c libavformat/avformat.h libavformat/siff.c
kostya
subversion
Mon Oct 22 08:01:38 CEST 2007
Author: kostya
Date: Mon Oct 22 08:01:38 2007
New Revision: 10833
Log:
Beam Software SIFF demuxer and video decoder
Added:
trunk/libavcodec/vb.c
trunk/libavformat/siff.c
Modified:
trunk/Changelog
trunk/MAINTAINERS
trunk/doc/general.texi
trunk/libavcodec/Makefile
trunk/libavcodec/allcodecs.c
trunk/libavcodec/avcodec.h
trunk/libavformat/Makefile
trunk/libavformat/allformats.c
trunk/libavformat/avformat.h
Modified: trunk/Changelog
==============================================================================
--- trunk/Changelog (original)
+++ trunk/Changelog Mon Oct 22 08:01:38 2007
@@ -100,6 +100,7 @@ version <next>
- DNxHD encoder
- H.264 PAFF decoding
- Nellymoser ASAO decoder
+- Beam Software SIFF demuxer and decoder
version 0.4.9-pre1:
Modified: trunk/MAINTAINERS
==============================================================================
--- trunk/MAINTAINERS (original)
+++ trunk/MAINTAINERS Mon Oct 22 08:01:38 2007
@@ -177,6 +177,7 @@ Codecs:
tscc.c Kostya Shishkov
txd.c Ivo van Poorten
ulti* Kostya Shishkov
+ vb.c Kostya Shishkov
vc1* Kostya Shishkov
vcr1.c Michael Niedermayer
vmnc.c Kostya Shishkov
@@ -245,6 +246,7 @@ Muxers/Demuxers:
rtsp.c Luca Barbato
sdp.c Luca Abeni
segafilm.c Mike Melanson
+ siff.c Kostya Shishkov
swf.c Baptiste Coudurier
txd.c Ivo van Poorten
v4l2.c Luca Abeni
Modified: trunk/doc/general.texi
==============================================================================
--- trunk/doc/general.texi (original)
+++ trunk/doc/general.texi Mon Oct 22 08:01:38 2007
@@ -117,6 +117,8 @@ different game cutscenes repacked for us
@item CRYO APC @tab @tab X
@tab Audio format used in some games by CRYO Interactive Entertainment.
@item Monkey's Audio @tab @tab X
+ at item SIFF @tab @tab X
+ at tab Audio and video format used in some games by Beam Software
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
Modified: trunk/libavcodec/Makefile
==============================================================================
--- trunk/libavcodec/Makefile (original)
+++ trunk/libavcodec/Makefile Mon Oct 22 08:01:38 2007
@@ -186,6 +186,7 @@ OBJS-$(CONFIG_TSCC_DECODER) +
OBJS-$(CONFIG_TTA_DECODER) += tta.o
OBJS-$(CONFIG_TXD_DECODER) += txd.o s3tc.o
OBJS-$(CONFIG_ULTI_DECODER) += ulti.o
+OBJS-$(CONFIG_VB_DECODER) += vb.o
OBJS-$(CONFIG_VC1_DECODER) += vc1.o vc1data.o vc1dsp.o msmpeg4data.o
OBJS-$(CONFIG_VCR1_DECODER) += vcr1.o
OBJS-$(CONFIG_VCR1_ENCODER) += vcr1.o
Modified: trunk/libavcodec/allcodecs.c
==============================================================================
--- trunk/libavcodec/allcodecs.c (original)
+++ trunk/libavcodec/allcodecs.c Mon Oct 22 08:01:38 2007
@@ -150,6 +150,7 @@ void avcodec_register_all(void)
REGISTER_DECODER (TSCC, tscc);
REGISTER_DECODER (TXD, txd);
REGISTER_DECODER (ULTI, ulti);
+ REGISTER_DECODER (VB, vb);
REGISTER_DECODER (VC1, vc1);
REGISTER_DECODER (VCR1, vcr1);
REGISTER_DECODER (VMDVIDEO, vmdvideo);
Modified: trunk/libavcodec/avcodec.h
==============================================================================
--- trunk/libavcodec/avcodec.h (original)
+++ trunk/libavcodec/avcodec.h Mon Oct 22 08:01:38 2007
@@ -33,8 +33,8 @@
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
-#define LIBAVCODEC_VERSION_INT ((51<<16)+(46<<8)+1)
-#define LIBAVCODEC_VERSION 51.46.1
+#define LIBAVCODEC_VERSION_INT ((51<<16)+(47<<8)+0)
+#define LIBAVCODEC_VERSION 51.47.0
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
@@ -168,6 +168,7 @@ enum CodecID {
CODEC_ID_TXD,
CODEC_ID_VP6A,
CODEC_ID_AMV,
+ CODEC_ID_VB,
/* various PCM "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
Added: trunk/libavcodec/vb.c
==============================================================================
--- (empty file)
+++ trunk/libavcodec/vb.c Mon Oct 22 08:01:38 2007
@@ -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
+};
+
Modified: trunk/libavformat/Makefile
==============================================================================
--- trunk/libavformat/Makefile (original)
+++ trunk/libavformat/Makefile Mon Oct 22 08:01:38 2007
@@ -127,6 +127,7 @@ OBJS-$(CONFIG_RTSP_DEMUXER)
OBJS-$(CONFIG_SDP_DEMUXER) += rtsp.o
OBJS-$(CONFIG_SEGAFILM_DEMUXER) += segafilm.o
OBJS-$(CONFIG_SHORTEN_DEMUXER) += raw.o
+OBJS-$(CONFIG_SIFF_DEMUXER) += siff.o
OBJS-$(CONFIG_SMACKER_DEMUXER) += smacker.o
OBJS-$(CONFIG_SOL_DEMUXER) += sol.o raw.o
OBJS-$(CONFIG_STR_DEMUXER) += psxstr.o
Modified: trunk/libavformat/allformats.c
==============================================================================
--- trunk/libavformat/allformats.c (original)
+++ trunk/libavformat/allformats.c Mon Oct 22 08:01:38 2007
@@ -147,6 +147,7 @@ void av_register_all(void)
#endif
REGISTER_DEMUXER (SEGAFILM, segafilm);
REGISTER_DEMUXER (SHORTEN, shorten);
+ REGISTER_DEMUXER (SIFF, siff);
REGISTER_DEMUXER (SMACKER, smacker);
REGISTER_DEMUXER (SOL, sol);
REGISTER_DEMUXER (STR, str);
Modified: trunk/libavformat/avformat.h
==============================================================================
--- trunk/libavformat/avformat.h (original)
+++ trunk/libavformat/avformat.h Mon Oct 22 08:01:38 2007
@@ -21,8 +21,8 @@
#ifndef FFMPEG_AVFORMAT_H
#define FFMPEG_AVFORMAT_H
-#define LIBAVFORMAT_VERSION_INT ((51<<16)+(16<<8)+1)
-#define LIBAVFORMAT_VERSION 51.16.1
+#define LIBAVFORMAT_VERSION_INT ((51<<16)+(17<<8)+0)
+#define LIBAVFORMAT_VERSION 51.17.0
#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
Added: trunk/libavformat/siff.c
==============================================================================
--- (empty file)
+++ trunk/libavformat/siff.c Mon Oct 22 08:01:38 2007
@@ -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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