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support for Tiertex .seq files demuxing/video decoding, by Gregory Montoir %cyx A users P sourceforge P net%

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Originally committed as revision 6672 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier
2006-10-12 12:02:58 +00:00
parent 7da4d4cdec
commit 29f86228a0
11 changed files with 556 additions and 4 deletions
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1
Changelog
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@@ -61,6 +61,7 @@ version <next>
- WavPack lossless audio decoder
- Targa (.TGA) picture decoder
- Delphine Software .cin demuxer/audio and video decoder
- Tiertex .seq demuxer/video decoder
version 0.4.9-pre1:

3
doc/ffmpeg-doc.texi
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@@ -740,6 +740,8 @@ library:
@tab Multimedia format used by Delphine Software games.
@item MXF @tab @tab X
@tab Material eXchange Format SMPTE 377M, used by D-Cinema, broadcast industry.
@item SEQ @tab @tab X
@tab Tiertex .seq files used in the DOS CDROM version of the game Flashback.
@end multitable
@code{X} means that encoding (resp. decoding) is supported.
@@ -843,6 +845,7 @@ following image formats are supported:
@item KMVC @tab @tab X @tab Codec used in Worms games.
@item VMware Video @tab @tab X @tab Codec used in videos captured by VMware.
@item Cin Video @tab @tab X @tab Codec used in Delphine Software games.
@item Tiertex Seq Video @tab @tab X @tab Codec used in DOS CDROM FlashBack game.
@end multitable
@code{X} means that encoding (resp. decoding) is supported.

1
libavcodec/Makefile
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@@ -146,6 +146,7 @@ OBJS-$(CONFIG_VCR1_ENCODER) += vcr1.o
OBJS-$(CONFIG_VMDAUDIO_DECODER) += vmdav.o
OBJS-$(CONFIG_VMDVIDEO_DECODER) += vmdav.o
OBJS-$(CONFIG_VMNC_DECODER) += vmnc.o
OBJS-$(CONFIG_TIERTEXSEQVIDEO_DECODER) += tiertexseqv.o
OBJS-$(CONFIG_VORBIS_DECODER) += vorbis.o vorbis_data.o
OBJS-$(CONFIG_VORBIS_ENCODER) += vorbis_enc.o vorbis_data.o
OBJS-$(CONFIG_VP3_DECODER) += vp3.o

3
libavcodec/allcodecs.c
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@@ -554,6 +554,9 @@ void avcodec_register_all(void)
#ifdef CONFIG_DSICINAUDIO_DECODER
register_avcodec(&dsicinaudio_decoder);
#endif //CONFIG_DSICINAUDIO_DECODER
#ifdef CONFIG_TIERTEXSEQVIDEO_DECODER
register_avcodec(&tiertexseqvideo_decoder);
#endif //CONFIG_TIERTEXSEQVIDEO_DECODER
#if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED)
#ifdef CONFIG_AMR_NB_DECODER

6
libavcodec/avcodec.h
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@@ -37,8 +37,8 @@ extern "C" {
#define AV_STRINGIFY(s) AV_TOSTRING(s)
#define AV_TOSTRING(s) #s
#define LIBAVCODEC_VERSION_INT ((51<<16)+(18<<8)+0)
#define LIBAVCODEC_VERSION 51.18.0
#define LIBAVCODEC_VERSION_INT ((51<<16)+(19<<8)+0)
#define LIBAVCODEC_VERSION 51.19.0
#define LIBAVCODEC_BUILD LIBAVCODEC_VERSION_INT
#define LIBAVCODEC_IDENT "Lavc" AV_STRINGIFY(LIBAVCODEC_VERSION)
@@ -146,6 +146,7 @@ enum CodecID {
CODEC_ID_VP6F,
CODEC_ID_TARGA,
CODEC_ID_DSICINVIDEO,
CODEC_ID_TIERTEXSEQVIDEO,
/* various pcm "codecs" */
CODEC_ID_PCM_S16LE= 0x10000,
@@ -2298,6 +2299,7 @@ extern AVCodec wavpack_decoder;
extern AVCodec targa_decoder;
extern AVCodec dsicinvideo_decoder;
extern AVCodec dsicinaudio_decoder;
extern AVCodec tiertexseqvideo_decoder;
/* pcm codecs */
#define PCM_CODEC(id, name) \

232
libavcodec/tiertexseqv.c Normal file
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@@ -0,0 +1,232 @@
/*
* Tiertex Limited SEQ Video Decoder
* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
*
* 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 tiertexseqv.c
* Tiertex Limited SEQ video decoder
*/
#include "avcodec.h"
#include "common.h"
#define ALT_BITSTREAM_READER_LE
#include "bitstream.h"
typedef struct SeqVideoContext {
AVCodecContext *avctx;
AVFrame frame;
unsigned int palette[256];
unsigned char block[8 * 8];
} SeqVideoContext;
static unsigned char *seq_unpack_rle_block(unsigned char *src, unsigned char *dst, int dst_size)
{
int i, len, sz;
GetBitContext gb;
int code_table[64];
/* get the rle codes (at most 64 bytes) */
init_get_bits(&gb, src, 64 * 8);
for (i = 0, sz = 0; i < 64 && sz < dst_size; i++) {
code_table[i] = get_sbits(&gb, 4);
sz += FFABS(code_table[i]);
}
src += (get_bits_count(&gb) + 7) / 8;
/* do the rle unpacking */
for (i = 0; i < 64 && dst_size > 0; i++) {
len = code_table[i];
if (len < 0) {
len = -len;
memset(dst, *src++, FFMIN(len, dst_size));
} else {
memcpy(dst, src, FFMIN(len, dst_size));
src += len;
}
dst += len;
dst_size -= len;
}
return src;
}
static unsigned char *seq_decode_op1(SeqVideoContext *seq, unsigned char *src, unsigned char *dst)
{
unsigned char *color_table;
int b, i, len, bits;
GetBitContext gb;
len = *src++;
if (len & 0x80) {
switch (len & 3) {
case 1:
src = seq_unpack_rle_block(src, seq->block, sizeof(seq->block));
for (b = 0; b < 8; b++) {
memcpy(dst, &seq->block[b * 8], 8);
dst += seq->frame.linesize[0];
}
break;
case 2:
src = seq_unpack_rle_block(src, seq->block, sizeof(seq->block));
for (i = 0; i < 8; i++) {
for (b = 0; b < 8; b++)
dst[b * seq->frame.linesize[0]] = seq->block[i * 8 + b];
++dst;
}
break;
}
} else {
color_table = src;
src += len;
bits = ff_log2_tab[len - 1] + 1;
init_get_bits(&gb, src, bits * 8 * 8); src += bits * 8;
for (b = 0; b < 8; b++) {
for (i = 0; i < 8; i++)
dst[i] = color_table[get_bits(&gb, bits)];
dst += seq->frame.linesize[0];
}
}
return src;
}
static unsigned char *seq_decode_op2(SeqVideoContext *seq, unsigned char *src, unsigned char *dst)
{
int i;
for (i = 0; i < 8; i++) {
memcpy(dst, src, 8);
src += 8;
dst += seq->frame.linesize[0];
}
return src;
}
static unsigned char *seq_decode_op3(SeqVideoContext *seq, unsigned char *src, unsigned char *dst)
{
int pos, offset;
do {
pos = *src++;
offset = ((pos >> 3) & 7) * seq->frame.linesize[0] + (pos & 7);
dst[offset] = *src++;
} while (!(pos & 0x80));
return src;
}
static void seqvideo_decode(SeqVideoContext *seq, unsigned char *data, int data_size)
{
GetBitContext gb;
int flags, i, j, x, y, op;
unsigned char c[3];
unsigned char *dst;
flags = *data++;
if (flags & 1) {
for (i = 0; i < 256; i++) {
for (j = 0; j < 3; j++, data++)
c[j] = (*data << 2) | (*data >> 4);
seq->palette[i] = (c[0] << 16) | (c[1] << 8) | c[2];
}
memcpy(seq->frame.data[1], seq->palette, sizeof(seq->palette));
seq->frame.palette_has_changed = 1;
}
if (flags & 2) {
init_get_bits(&gb, data, 128 * 8); data += 128;
for (y = 0; y < 128; y += 8)
for (x = 0; x < 256; x += 8) {
dst = &seq->frame.data[0][y * seq->frame.linesize[0] + x];
op = get_bits(&gb, 2);
switch (op) {
case 1:
data = seq_decode_op1(seq, data, dst);
break;
case 2:
data = seq_decode_op2(seq, data, dst);
break;
case 3:
data = seq_decode_op3(seq, data, dst);
break;
}
}
}
}
static int seqvideo_decode_init(AVCodecContext *avctx)
{
SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data;
seq->avctx = avctx;
avctx->pix_fmt = PIX_FMT_PAL8;
avctx->has_b_frames = 0;
seq->frame.data[0] = NULL;
return 0;
}
static int seqvideo_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
uint8_t *buf, int buf_size)
{
SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data;
seq->frame.reference = 1;
seq->frame.buffer_hints = FF_BUFFER_HINTS_VALID | FF_BUFFER_HINTS_PRESERVE | FF_BUFFER_HINTS_REUSABLE;
if (avctx->reget_buffer(avctx, &seq->frame)) {
av_log(seq->avctx, AV_LOG_ERROR, "tiertexseqvideo: reget_buffer() failed\n");
return -1;
}
seqvideo_decode(seq, buf, buf_size);
*data_size = sizeof(AVFrame);
*(AVFrame *)data = seq->frame;
return buf_size;
}
static int seqvideo_decode_end(AVCodecContext *avctx)
{
SeqVideoContext *seq = (SeqVideoContext *)avctx->priv_data;
if (seq->frame.data[0])
avctx->release_buffer(avctx, &seq->frame);
return 0;
}
AVCodec tiertexseqvideo_decoder = {
"tiertexseqvideo",
CODEC_TYPE_VIDEO,
CODEC_ID_TIERTEXSEQVIDEO,
sizeof(SeqVideoContext),
seqvideo_decode_init,
NULL,
seqvideo_decode_end,
seqvideo_decode_frame,
CODEC_CAP_DR1,
};

1
libavformat/Makefile
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@@ -130,6 +130,7 @@ OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood.o
OBJS-$(CONFIG_WV_DEMUXER) += wv.o
OBJS-$(CONFIG_YUV4MPEGPIPE_MUXER) += yuv4mpeg.o
OBJS-$(CONFIG_YUV4MPEGPIPE_DEMUXER) += yuv4mpeg.o
OBJS-$(CONFIG_TIERTEXSEQ_DEMUXER) += tiertexseq.o
# image formats
OBJS+= pnm.o yuv.o png.o jpeg.o gifdec.o sgi.o

3
libavformat/allformats.c
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@@ -478,6 +478,9 @@ void av_register_all(void)
#ifdef CONFIG_YUV4MPEGPIPE_DEMUXER
av_register_input_format(&yuv4mpegpipe_demuxer);
#endif
#ifdef CONFIG_TIERTEXSEQ_DEMUXER
av_register_input_format(&tiertexseq_demuxer);
#endif
/* image formats */
#if 0

1
libavformat/allformats.h
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@@ -162,6 +162,7 @@ extern AVInputFormat wsvqa_demuxer;
extern AVInputFormat wv_demuxer;
extern AVOutputFormat yuv4mpegpipe_muxer;
extern AVInputFormat yuv4mpegpipe_demuxer;
extern AVInputFormat tiertexseq_demuxer;
/* raw.c */
int pcm_read_seek(AVFormatContext *s,

4
libavformat/avformat.h
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@@ -25,8 +25,8 @@
extern "C" {
#endif
#define LIBAVFORMAT_VERSION_INT ((50<<16)+(5<<8)+0)
#define LIBAVFORMAT_VERSION 50.5.0
#define LIBAVFORMAT_VERSION_INT ((50<<16)+(6<<8)+0)
#define LIBAVFORMAT_VERSION 50.6.0
#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)

305
libavformat/tiertexseq.c Normal file
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@@ -0,0 +1,305 @@
/*
* Tiertex Limited SEQ File Demuxer
* Copyright (c) 2006 Gregory Montoir (cyx@users.sourceforge.net)
*
* 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 tiertexseq.c
* Tiertex Limited SEQ file demuxer
*/
#include "avformat.h"
#define SEQ_FRAME_SIZE 6144
#define SEQ_FRAME_W 256
#define SEQ_FRAME_H 128
#define SEQ_NUM_FRAME_BUFFERS 30
#define SEQ_AUDIO_BUFFER_SIZE 882
#define SEQ_SAMPLE_RATE 22050
#define SEQ_FRAME_RATE 25
typedef struct TiertexSeqFrameBuffer {
int fill_size;
int data_size;
unsigned char *data;
} TiertexSeqFrameBuffer;
typedef struct SeqDemuxContext {
int audio_stream_index;
int video_stream_index;
int current_frame_pts;
int current_frame_offs;
TiertexSeqFrameBuffer frame_buffers[SEQ_NUM_FRAME_BUFFERS];
int frame_buffers_count;
unsigned int current_audio_data_size;
unsigned int current_audio_data_offs;
unsigned int current_pal_data_size;
unsigned int current_pal_data_offs;
unsigned int current_video_data_size;
unsigned char *current_video_data_ptr;
int audio_buffer_full;
} SeqDemuxContext;
static int seq_probe(AVProbeData *p)
{
int i;
if (p->buf_size < 256)
return 0;
/* there's no real header in a .seq file, the only thing they have in common */
/* is the first 256 bytes of the file which are always filled with 0 */
for (i = 0; i < 256; i++)
if (p->buf[0] != 0)
return 0;
/* only one fourth of the score since the previous check is too naive */
return AVPROBE_SCORE_MAX / 4;
}
static int seq_init_frame_buffers(SeqDemuxContext *seq, ByteIOContext *pb)
{
int i, sz;
TiertexSeqFrameBuffer *seq_buffer;
url_fseek(pb, 256, SEEK_SET);
for (i = 0; i < SEQ_NUM_FRAME_BUFFERS; i++) {
sz = get_le16(pb);
if (sz == 0)
break;
else {
seq_buffer = &seq->frame_buffers[i];
seq_buffer->fill_size = 0;
seq_buffer->data_size = sz;
seq_buffer->data = av_malloc(sz);
if (!seq_buffer->data)
return AVERROR_NOMEM;
}
}
seq->frame_buffers_count = i;
return 0;
}
static int seq_fill_buffer(SeqDemuxContext *seq, ByteIOContext *pb, int buffer_num, unsigned int data_offs, int data_size)
{
TiertexSeqFrameBuffer *seq_buffer;
if (buffer_num >= SEQ_NUM_FRAME_BUFFERS)
return AVERROR_INVALIDDATA;
seq_buffer = &seq->frame_buffers[buffer_num];
if (seq_buffer->fill_size + data_size > seq_buffer->data_size)
return AVERROR_INVALIDDATA;
url_fseek(pb, seq->current_frame_offs + data_offs, SEEK_SET);
if (get_buffer(pb, seq_buffer->data + seq_buffer->fill_size, data_size) != data_size)
return AVERROR_IO;
seq_buffer->fill_size += data_size;
return 0;
}
static int seq_parse_frame_data(SeqDemuxContext *seq, ByteIOContext *pb)
{
unsigned int offset_table[4], buffer_num[4];
TiertexSeqFrameBuffer *seq_buffer;
int i, e;
seq->current_frame_offs += SEQ_FRAME_SIZE;
url_fseek(pb, seq->current_frame_offs, SEEK_SET);
/* sound data */
seq->current_audio_data_offs = get_le16(pb);
if (seq->current_audio_data_offs != 0) {
seq->current_audio_data_size = SEQ_AUDIO_BUFFER_SIZE * 2;
} else {
seq->current_audio_data_size = 0;
}
/* palette data */
seq->current_pal_data_offs = get_le16(pb);
if (seq->current_pal_data_offs != 0) {
seq->current_pal_data_size = 768;
} else {
seq->current_pal_data_size = 0;
}
/* video data */
for (i = 0; i < 4; i++)
buffer_num[i] = get_byte(pb);
for (i = 0; i < 4; i++)
offset_table[i] = get_le16(pb);
for (i = 0; i < 3; i++) {
if (offset_table[i] != 0) {
for (e = i + 1; e < 4 && offset_table[e] == 0; e++);
seq_fill_buffer(seq, pb, buffer_num[1 + i],
offset_table[i],
offset_table[e] - offset_table[i]);
}
}
if (buffer_num[0] != 255) {
seq_buffer = &seq->frame_buffers[buffer_num[0]];
seq->current_video_data_size = seq_buffer->fill_size;
seq->current_video_data_ptr = seq_buffer->data;
seq_buffer->fill_size = 0;
} else {
seq->current_video_data_size = 0;
seq->current_video_data_ptr = 0;
}
return 0;
}
static int seq_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
int i, rc;
SeqDemuxContext *seq = (SeqDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
AVStream *st;
/* init internal buffers */
rc = seq_init_frame_buffers(seq, pb);
if (rc)
return rc;
seq->current_frame_offs = 0;
/* preload (no audio data, just buffer operations related data) */
for (i = 1; i <= 100; i++) {
rc = seq_parse_frame_data(seq, pb);
if (rc)
return rc;
}
seq->current_frame_pts = 0;
seq->audio_buffer_full = 0;
/* initialize the video decoder stream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
av_set_pts_info(st, 32, 1, SEQ_FRAME_RATE);
seq->video_stream_index = st->index;
st->codec->codec_type = CODEC_TYPE_VIDEO;
st->codec->codec_id = CODEC_ID_TIERTEXSEQVIDEO;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->width = SEQ_FRAME_W;
st->codec->height = SEQ_FRAME_H;
/* initialize the audio decoder stream */
st = av_new_stream(s, 0);
if (!st)
return AVERROR_NOMEM;
av_set_pts_info(st, 32, 1, SEQ_SAMPLE_RATE);
seq->audio_stream_index = st->index;
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_id = CODEC_ID_PCM_S16BE;
st->codec->codec_tag = 0; /* no tag */
st->codec->channels = 1;
st->codec->sample_rate = SEQ_SAMPLE_RATE;
st->codec->bits_per_sample = 16;
st->codec->bit_rate = st->codec->sample_rate * st->codec->bits_per_sample * st->codec->channels;
st->codec->block_align = st->codec->channels * st->codec->bits_per_sample;
return 0;
}
static int seq_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int rc;
SeqDemuxContext *seq = (SeqDemuxContext *)s->priv_data;
ByteIOContext *pb = &s->pb;
if (!seq->audio_buffer_full) {
rc = seq_parse_frame_data(seq, pb);
if (rc)
return rc;
/* video packet */
if (seq->current_pal_data_size + seq->current_video_data_size != 0) {
if (av_new_packet(pkt, 1 + seq->current_pal_data_size + seq->current_video_data_size))
return AVERROR_NOMEM;
pkt->data[0] = 0;
if (seq->current_pal_data_size != 0) {
pkt->data[0] |= 1;
url_fseek(pb, seq->current_frame_offs + seq->current_pal_data_offs, SEEK_SET);
if (get_buffer(pb, &pkt->data[1], seq->current_pal_data_size) != seq->current_pal_data_size)
return AVERROR_IO;
}
if (seq->current_video_data_size != 0) {
pkt->data[0] |= 2;
memcpy(&pkt->data[1 + seq->current_pal_data_size],
seq->current_video_data_ptr,
seq->current_video_data_size);
}
pkt->stream_index = seq->video_stream_index;
pkt->pts = seq->current_frame_pts;
/* sound buffer will be processed on next read_packet() call */
seq->audio_buffer_full = 1;
return 0;
}
}
/* audio packet */
if (seq->current_audio_data_offs == 0) /* end of data reached */
return AVERROR_IO;
url_fseek(pb, seq->current_frame_offs + seq->current_audio_data_offs, SEEK_SET);
rc = av_get_packet(pb, pkt, seq->current_audio_data_size);
if (rc < 0)
return rc;
pkt->stream_index = seq->audio_stream_index;
pkt->pts = seq->current_frame_pts++;
seq->audio_buffer_full = 0;
return 0;
}
static int seq_read_close(AVFormatContext *s)
{
int i;
SeqDemuxContext *seq = (SeqDemuxContext *)s->priv_data;
for (i = 0; i < SEQ_NUM_FRAME_BUFFERS; i++)
av_free(seq->frame_buffers[i].data);
return 0;
}
AVInputFormat tiertexseq_demuxer = {
"tiertexseq",
"Tiertex Limited SEQ format",
sizeof(SeqDemuxContext),
seq_probe,
seq_read_header,
seq_read_packet,
seq_read_close,
};