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/*
* Sierra VMD Format Demuxer |
41ed7ab4 |
* Copyright (c) 2004 The FFmpeg project |
a7eb3c8d |
* |
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* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
a7eb3c8d |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* 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 |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/
/** |
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* @file |
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* Sierra VMD file demuxer
* by Vladimir "VAG" Gneushev (vagsoft at mail.ru) |
23fe14bb |
* for more information on the Sierra VMD file format, visit:
* http://www.pcisys.net/~melanson/codecs/ |
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*/
|
a634896c |
#include "libavutil/channel_layout.h" |
6a5d31ac |
#include "libavutil/intreadwrite.h" |
a7eb3c8d |
#include "avformat.h" |
c3f9ebf7 |
#include "internal.h" |
47c4713a |
#include "avio_internal.h" |
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#define VMD_HEADER_SIZE 0x0330
#define BYTES_PER_FRAME_RECORD 16
|
daf8cf35 |
typedef struct vmd_frame { |
a7eb3c8d |
int stream_index; |
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int64_t frame_offset; |
a7eb3c8d |
unsigned int frame_size;
int64_t pts;
int keyframe;
unsigned char frame_record[BYTES_PER_FRAME_RECORD]; |
02fb2546 |
} vmd_frame; |
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typedef struct VmdDemuxContext {
int video_stream_index;
int audio_stream_index;
unsigned int frame_count; |
d82da3a8 |
unsigned int frames_per_block; |
02fb2546 |
vmd_frame *frame_table; |
a7eb3c8d |
unsigned int current_frame; |
10f35ebd |
int is_indeo3; |
a7eb3c8d |
|
23fe14bb |
int sample_rate;
int64_t audio_sample_counter; |
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int skiphdr; |
23fe14bb |
|
a7eb3c8d |
unsigned char vmd_header[VMD_HEADER_SIZE];
} VmdDemuxContext;
static int vmd_probe(AVProbeData *p)
{ |
4ec509ce |
int w, h, sample_rate;
if (p->buf_size < 806) |
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return 0; |
a7eb3c8d |
/* check if the first 2 bytes of the file contain the appropriate size
* of a VMD header chunk */ |
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if (AV_RL16(&p->buf[0]) != VMD_HEADER_SIZE - 2) |
a7eb3c8d |
return 0; |
97e07808 |
w = AV_RL16(&p->buf[12]);
h = AV_RL16(&p->buf[14]); |
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sample_rate = AV_RL16(&p->buf[804]);
if ((!w || w > 2048 || !h || h > 2048) &&
sample_rate != 22050) |
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return 0; |
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/* only return half certainty since this check is a bit sketchy */ |
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return AVPROBE_SCORE_EXTENSION; |
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}
|
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static int vmd_read_header(AVFormatContext *s) |
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{ |
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VmdDemuxContext *vmd = s->priv_data; |
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AVIOContext *pb = s->pb; |
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AVStream *st = NULL, *vst = NULL; |
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unsigned int toc_offset;
unsigned char *raw_frame_table;
int raw_frame_table_size; |
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int64_t current_offset; |
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int i, j, ret; |
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int width, height; |
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unsigned int total_frames; |
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int64_t current_audio_pts = 0; |
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unsigned char chunk[BYTES_PER_FRAME_RECORD]; |
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int num, den; |
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int sound_buffers; |
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/* fetch the main header, including the 2 header length bytes */ |
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avio_seek(pb, 0, SEEK_SET); |
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if (avio_read(pb, vmd->vmd_header, VMD_HEADER_SIZE) != VMD_HEADER_SIZE) |
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return AVERROR(EIO); |
a7eb3c8d |
|
4ec509ce |
width = AV_RL16(&vmd->vmd_header[12]);
height = AV_RL16(&vmd->vmd_header[14]);
if (width && height) { |
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if(vmd->vmd_header[24] == 'i' && vmd->vmd_header[25] == 'v' && vmd->vmd_header[26] == '3') {
vmd->is_indeo3 = 1;
} else {
vmd->is_indeo3 = 0;
}
/* start up the decoders */
vst = avformat_new_stream(s, NULL);
if (!vst)
return AVERROR(ENOMEM);
avpriv_set_pts_info(vst, 33, 1, 10);
vmd->video_stream_index = vst->index; |
6f69f7a8 |
vst->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
vst->codecpar->codec_id = vmd->is_indeo3 ? AV_CODEC_ID_INDEO3 : AV_CODEC_ID_VMDVIDEO;
vst->codecpar->codec_tag = 0; /* no fourcc */
vst->codecpar->width = width;
vst->codecpar->height = height;
if(vmd->is_indeo3 && vst->codecpar->width > 320){
vst->codecpar->width >>= 1;
vst->codecpar->height >>= 1; |
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} |
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if (ff_alloc_extradata(vst->codecpar, VMD_HEADER_SIZE)) |
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return AVERROR(ENOMEM); |
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memcpy(vst->codecpar->extradata, vmd->vmd_header, VMD_HEADER_SIZE); |
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} |
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/* if sample rate is 0, assume no audio */ |
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vmd->sample_rate = AV_RL16(&vmd->vmd_header[804]); |
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if (vmd->sample_rate) { |
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st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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vmd->audio_stream_index = st->index; |
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->codec_id = AV_CODEC_ID_VMDAUDIO;
st->codecpar->codec_tag = 0; /* no fourcc */
st->codecpar->sample_rate = vmd->sample_rate;
st->codecpar->block_align = AV_RL16(&vmd->vmd_header[806]);
if (st->codecpar->block_align & 0x8000) {
st->codecpar->bits_per_coded_sample = 16;
st->codecpar->block_align = -(st->codecpar->block_align - 0x10000); |
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} else { |
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st->codecpar->bits_per_coded_sample = 8; |
d82da3a8 |
} |
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if (vmd->vmd_header[811] & 0x80) {
st->codecpar->channels = 2;
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
} else if (vmd->vmd_header[811] & 0x2) {
/* Shivers 2 stereo audio */
/* Frame length is for 1 channel */
st->codecpar->channels = 2;
st->codecpar->channel_layout = AV_CH_LAYOUT_STEREO;
st->codecpar->block_align = st->codecpar->block_align << 1;
} else {
st->codecpar->channels = 1;
st->codecpar->channel_layout = AV_CH_LAYOUT_MONO;
} |
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st->codecpar->bit_rate = st->codecpar->sample_rate *
st->codecpar->bits_per_coded_sample * st->codecpar->channels; |
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|
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/* calculate pts */ |
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num = st->codecpar->block_align;
den = st->codecpar->sample_rate * st->codecpar->channels; |
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av_reduce(&num, &den, num, den, (1UL<<31)-1); |
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if (vst) |
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avpriv_set_pts_info(vst, 33, num, den); |
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avpriv_set_pts_info(st, 33, num, den); |
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}
|
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toc_offset = AV_RL32(&vmd->vmd_header[812]);
vmd->frame_count = AV_RL16(&vmd->vmd_header[6]);
vmd->frames_per_block = AV_RL16(&vmd->vmd_header[18]); |
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avio_seek(pb, toc_offset, SEEK_SET); |
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raw_frame_table = NULL;
vmd->frame_table = NULL; |
fead30d4 |
sound_buffers = AV_RL16(&vmd->vmd_header[808]); |
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raw_frame_table_size = vmd->frame_count * 6; |
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if(vmd->frame_count * vmd->frames_per_block >= UINT_MAX / sizeof(vmd_frame) - sound_buffers){ |
a443a253 |
av_log(s, AV_LOG_ERROR, "vmd->frame_count * vmd->frames_per_block too large\n");
return -1;
} |
5a96cd64 |
raw_frame_table = av_malloc(raw_frame_table_size); |
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vmd->frame_table = av_malloc_array(vmd->frame_count * vmd->frames_per_block + sound_buffers, sizeof(vmd_frame)); |
a7eb3c8d |
if (!raw_frame_table || !vmd->frame_table) { |
0ef1660a |
ret = AVERROR(ENOMEM);
goto error; |
a7eb3c8d |
} |
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if (avio_read(pb, raw_frame_table, raw_frame_table_size) != |
a7eb3c8d |
raw_frame_table_size) { |
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ret = AVERROR(EIO);
goto error; |
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}
|
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total_frames = 0;
for (i = 0; i < vmd->frame_count; i++) {
|
fead30d4 |
current_offset = AV_RL32(&raw_frame_table[6 * i + 2]); |
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/* handle each entry in index block */
for (j = 0; j < vmd->frames_per_block; j++) {
int type;
uint32_t size;
|
a165964f |
if ((ret = avio_read(pb, chunk, BYTES_PER_FRAME_RECORD)) != BYTES_PER_FRAME_RECORD) {
av_log(s, AV_LOG_ERROR, "Failed to read frame record\n");
if (ret >= 0)
ret = AVERROR_INVALIDDATA;
goto error;
} |
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type = chunk[0]; |
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size = AV_RL32(&chunk[2]); |
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if (size > INT_MAX / 2) {
av_log(s, AV_LOG_ERROR, "Invalid frame size\n");
ret = AVERROR_INVALIDDATA;
goto error;
} |
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if(!size && type != 1) |
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continue;
switch(type) {
case 1: /* Audio Chunk */ |
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if (!st) break; |
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/* first audio chunk contains several audio buffers */ |
7d2b199b |
vmd->frame_table[total_frames].frame_offset = current_offset;
vmd->frame_table[total_frames].stream_index = vmd->audio_stream_index;
vmd->frame_table[total_frames].frame_size = size;
memcpy(vmd->frame_table[total_frames].frame_record, chunk, BYTES_PER_FRAME_RECORD);
vmd->frame_table[total_frames].pts = current_audio_pts;
total_frames++; |
d6da3df7 |
if(!current_audio_pts) |
e9626eb3 |
current_audio_pts += sound_buffers - 1; |
d6da3df7 |
else
current_audio_pts++; |
d82da3a8 |
break;
case 2: /* Video Chunk */
vmd->frame_table[total_frames].frame_offset = current_offset;
vmd->frame_table[total_frames].stream_index = vmd->video_stream_index; |
ffa0a3d6 |
vmd->frame_table[total_frames].frame_size = size; |
d82da3a8 |
memcpy(vmd->frame_table[total_frames].frame_record, chunk, BYTES_PER_FRAME_RECORD); |
d6da3df7 |
vmd->frame_table[total_frames].pts = i; |
d82da3a8 |
total_frames++;
break;
}
current_offset += size; |
a7eb3c8d |
}
}
av_free(raw_frame_table);
vmd->current_frame = 0; |
d82da3a8 |
vmd->frame_count = total_frames; |
a7eb3c8d |
return 0; |
0ef1660a |
error: |
02f56bfc |
av_freep(&raw_frame_table);
av_freep(&vmd->frame_table); |
0ef1660a |
return ret; |
a7eb3c8d |
}
static int vmd_read_packet(AVFormatContext *s,
AVPacket *pkt)
{ |
e4141433 |
VmdDemuxContext *vmd = s->priv_data; |
471fe57e |
AVIOContext *pb = s->pb; |
a7eb3c8d |
int ret = 0; |
02fb2546 |
vmd_frame *frame; |
a7eb3c8d |
if (vmd->current_frame >= vmd->frame_count) |
4bf3bc6f |
return AVERROR_EOF; |
a7eb3c8d |
frame = &vmd->frame_table[vmd->current_frame];
/* position the stream (will probably be there already) */ |
f59d8ff8 |
avio_seek(pb, frame->frame_offset, SEEK_SET); |
a7eb3c8d |
|
47c4713a |
if(ffio_limit(pb, frame->frame_size) != frame->frame_size)
return AVERROR(EIO); |
a7eb3c8d |
if (av_new_packet(pkt, frame->frame_size + BYTES_PER_FRAME_RECORD)) |
769e10f0 |
return AVERROR(ENOMEM); |
384c9c2f |
pkt->pos= avio_tell(pb); |
a7eb3c8d |
memcpy(pkt->data, frame->frame_record, BYTES_PER_FRAME_RECORD); |
0e635f3e |
if(vmd->is_indeo3 && frame->frame_record[0] == 0x02) |
e63a3628 |
ret = avio_read(pb, pkt->data, frame->frame_size); |
10f35ebd |
else |
e63a3628 |
ret = avio_read(pb, pkt->data + BYTES_PER_FRAME_RECORD, |
10f35ebd |
frame->frame_size); |
a7eb3c8d |
|
23fe14bb |
if (ret != frame->frame_size) { |
ce70f28a |
av_packet_unref(pkt); |
6f3e0b21 |
ret = AVERROR(EIO); |
23fe14bb |
} |
a7eb3c8d |
pkt->stream_index = frame->stream_index; |
ffa0a3d6 |
pkt->pts = frame->pts; |
b9450753 |
av_log(s, AV_LOG_DEBUG, " dispatching %s frame with %d bytes and pts %"PRId64"\n", |
e344c1ea |
(frame->frame_record[0] == 0x02) ? "video" : "audio",
frame->frame_size + BYTES_PER_FRAME_RECORD, |
ffa0a3d6 |
pkt->pts); |
a7eb3c8d |
vmd->current_frame++;
return ret;
}
static int vmd_read_close(AVFormatContext *s)
{ |
e4141433 |
VmdDemuxContext *vmd = s->priv_data; |
a7eb3c8d |
|
02f56bfc |
av_freep(&vmd->frame_table); |
a7eb3c8d |
return 0;
}
|
66355be3 |
AVInputFormat ff_vmd_demuxer = { |
dfc2c4d9 |
.name = "vmd", |
6774247a |
.long_name = NULL_IF_CONFIG_SMALL("Sierra VMD"), |
dfc2c4d9 |
.priv_data_size = sizeof(VmdDemuxContext),
.read_probe = vmd_probe,
.read_header = vmd_read_header,
.read_packet = vmd_read_packet,
.read_close = vmd_read_close, |
a7eb3c8d |
}; |