mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
e37f161e66
* qatar/master: (71 commits) movenc: Allow writing to a non-seekable output if using empty moov movenc: Support adding isml (smooth streaming live) metadata libavcodec: Don't crash in avcodec_encode_audio if time_base isn't set sunrast: Document the different Sun Raster file format types. sunrast: Add a check for experimental type. libspeexenc: use AVSampleFormat instead of deprecated/removed SampleFormat lavf: remove disabled FF_API_SET_PTS_INFO cruft lavf: remove disabled FF_API_OLD_INTERRUPT_CB cruft lavf: remove disabled FF_API_REORDER_PRIVATE cruft lavf: remove disabled FF_API_SEEK_PUBLIC cruft lavf: remove disabled FF_API_STREAM_COPY cruft lavf: remove disabled FF_API_PRELOAD cruft lavf: remove disabled FF_API_NEW_STREAM cruft lavf: remove disabled FF_API_RTSP_URL_OPTIONS cruft lavf: remove disabled FF_API_MUXRATE cruft lavf: remove disabled FF_API_FILESIZE cruft lavf: remove disabled FF_API_TIMESTAMP cruft lavf: remove disabled FF_API_LOOP_OUTPUT cruft lavf: remove disabled FF_API_LOOP_INPUT cruft lavf: remove disabled FF_API_AVSTREAM_QUALITY cruft ... Conflicts: doc/APIchanges libavcodec/8bps.c libavcodec/avcodec.h libavcodec/libx264.c libavcodec/mjpegbdec.c libavcodec/options.c libavcodec/sunrast.c libavcodec/utils.c libavcodec/version.h libavcodec/x86/h264_deblock.asm libavdevice/libdc1394.c libavdevice/v4l2.c libavformat/avformat.h libavformat/avio.c libavformat/avio.h libavformat/aviobuf.c libavformat/dv.c libavformat/mov.c libavformat/utils.c libavformat/version.h libavformat/wtv.c libavutil/Makefile libavutil/file.c libswscale/x86/input.asm libswscale/x86/swscale_mmx.c libswscale/x86/swscale_template.c tests/ref/lavf/ffm Merged-by: Michael Niedermayer <michaelni@gmx.at>
267 lines
8.7 KiB
C
267 lines
8.7 KiB
C
/*
|
|
* Westwood Studios VQA Format Demuxer
|
|
* Copyright (c) 2003 The ffmpeg Project
|
|
*
|
|
* 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
|
|
* Westwood Studios VQA file demuxer
|
|
* by Mike Melanson (melanson@pcisys.net)
|
|
* for more information on the Westwood file formats, visit:
|
|
* http://www.pcisys.net/~melanson/codecs/
|
|
* http://www.geocities.com/SiliconValley/8682/aud3.txt
|
|
*/
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
#define FORM_TAG MKBETAG('F', 'O', 'R', 'M')
|
|
#define WVQA_TAG MKBETAG('W', 'V', 'Q', 'A')
|
|
#define VQHD_TAG MKBETAG('V', 'Q', 'H', 'D')
|
|
#define FINF_TAG MKBETAG('F', 'I', 'N', 'F')
|
|
#define SND0_TAG MKBETAG('S', 'N', 'D', '0')
|
|
#define SND1_TAG MKBETAG('S', 'N', 'D', '1')
|
|
#define SND2_TAG MKBETAG('S', 'N', 'D', '2')
|
|
#define VQFR_TAG MKBETAG('V', 'Q', 'F', 'R')
|
|
|
|
/* don't know what these tags are for, but acknowledge their existence */
|
|
#define CINF_TAG MKBETAG('C', 'I', 'N', 'F')
|
|
#define CINH_TAG MKBETAG('C', 'I', 'N', 'H')
|
|
#define CIND_TAG MKBETAG('C', 'I', 'N', 'D')
|
|
#define PINF_TAG MKBETAG('P', 'I', 'N', 'F')
|
|
#define PINH_TAG MKBETAG('P', 'I', 'N', 'H')
|
|
#define PIND_TAG MKBETAG('P', 'I', 'N', 'D')
|
|
#define CMDS_TAG MKBETAG('C', 'M', 'D', 'S')
|
|
|
|
#define VQA_HEADER_SIZE 0x2A
|
|
#define VQA_PREAMBLE_SIZE 8
|
|
|
|
typedef struct WsVqaDemuxContext {
|
|
int audio_channels;
|
|
int audio_stream_index;
|
|
int video_stream_index;
|
|
} WsVqaDemuxContext;
|
|
|
|
static int wsvqa_probe(AVProbeData *p)
|
|
{
|
|
/* need 12 bytes to qualify */
|
|
if (p->buf_size < 12)
|
|
return 0;
|
|
|
|
/* check for the VQA signatures */
|
|
if ((AV_RB32(&p->buf[0]) != FORM_TAG) ||
|
|
(AV_RB32(&p->buf[8]) != WVQA_TAG))
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static int wsvqa_read_header(AVFormatContext *s)
|
|
{
|
|
WsVqaDemuxContext *wsvqa = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
AVStream *st;
|
|
unsigned char *header;
|
|
unsigned char scratch[VQA_PREAMBLE_SIZE];
|
|
unsigned int chunk_tag;
|
|
unsigned int chunk_size;
|
|
int fps, version, flags, sample_rate, channels;
|
|
|
|
/* initialize the video decoder stream */
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
st->start_time = 0;
|
|
wsvqa->video_stream_index = st->index;
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = CODEC_ID_WS_VQA;
|
|
st->codec->codec_tag = 0; /* no fourcc */
|
|
|
|
/* skip to the start of the VQA header */
|
|
avio_seek(pb, 20, SEEK_SET);
|
|
|
|
/* the VQA header needs to go to the decoder */
|
|
st->codec->extradata_size = VQA_HEADER_SIZE;
|
|
st->codec->extradata = av_mallocz(VQA_HEADER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
header = (unsigned char *)st->codec->extradata;
|
|
if (avio_read(pb, st->codec->extradata, VQA_HEADER_SIZE) !=
|
|
VQA_HEADER_SIZE) {
|
|
av_free(st->codec->extradata);
|
|
return AVERROR(EIO);
|
|
}
|
|
st->codec->width = AV_RL16(&header[6]);
|
|
st->codec->height = AV_RL16(&header[8]);
|
|
fps = header[12];
|
|
if (fps < 1 || fps > 30) {
|
|
av_log(s, AV_LOG_ERROR, "invalid fps: %d\n", fps);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
avpriv_set_pts_info(st, 64, 1, fps);
|
|
|
|
/* initialize the audio decoder stream for VQA v1 or nonzero samplerate */
|
|
version = AV_RL16(&header[ 0]);
|
|
flags = AV_RL16(&header[ 2]);
|
|
sample_rate = AV_RL16(&header[24]);
|
|
channels = header[26];
|
|
if (sample_rate || (version == 1 && flags == 1)) {
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
st->start_time = 0;
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
|
|
st->codec->extradata_size = VQA_HEADER_SIZE;
|
|
st->codec->extradata = av_mallocz(VQA_HEADER_SIZE + FF_INPUT_BUFFER_PADDING_SIZE);
|
|
if (!st->codec->extradata)
|
|
return AVERROR(ENOMEM);
|
|
memcpy(st->codec->extradata, header, VQA_HEADER_SIZE);
|
|
|
|
if (!sample_rate)
|
|
sample_rate = 22050;
|
|
st->codec->sample_rate = sample_rate;
|
|
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
|
|
|
|
if (!channels)
|
|
channels = 1;
|
|
st->codec->channels = channels;
|
|
|
|
switch (version) {
|
|
case 1:
|
|
st->codec->codec_id = CODEC_ID_WESTWOOD_SND1;
|
|
break;
|
|
case 2:
|
|
case 3:
|
|
st->codec->codec_id = CODEC_ID_ADPCM_IMA_WS;
|
|
st->codec->bits_per_coded_sample = 4;
|
|
st->codec->bit_rate = channels * sample_rate * 4;
|
|
break;
|
|
default:
|
|
/* NOTE: version 0 is supposedly raw pcm_u8 or pcm_s16le, but we do
|
|
not have any samples to validate this */
|
|
av_log_ask_for_sample(s, "VQA version %d audio\n", version);
|
|
return AVERROR_PATCHWELCOME;
|
|
}
|
|
|
|
wsvqa->audio_stream_index = st->index;
|
|
wsvqa->audio_channels = st->codec->channels;
|
|
}
|
|
|
|
/* there are 0 or more chunks before the FINF chunk; iterate until
|
|
* FINF has been skipped and the file will be ready to be demuxed */
|
|
do {
|
|
if (avio_read(pb, scratch, VQA_PREAMBLE_SIZE) != VQA_PREAMBLE_SIZE)
|
|
return AVERROR(EIO);
|
|
chunk_tag = AV_RB32(&scratch[0]);
|
|
chunk_size = AV_RB32(&scratch[4]);
|
|
|
|
/* catch any unknown header tags, for curiousity */
|
|
switch (chunk_tag) {
|
|
case CINF_TAG:
|
|
case CINH_TAG:
|
|
case CIND_TAG:
|
|
case PINF_TAG:
|
|
case PINH_TAG:
|
|
case PIND_TAG:
|
|
case FINF_TAG:
|
|
case CMDS_TAG:
|
|
break;
|
|
|
|
default:
|
|
av_log (s, AV_LOG_ERROR, " note: unknown chunk seen (%c%c%c%c)\n",
|
|
scratch[0], scratch[1],
|
|
scratch[2], scratch[3]);
|
|
break;
|
|
}
|
|
|
|
avio_skip(pb, chunk_size);
|
|
} while (chunk_tag != FINF_TAG);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int wsvqa_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
WsVqaDemuxContext *wsvqa = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int ret = -1;
|
|
unsigned char preamble[VQA_PREAMBLE_SIZE];
|
|
unsigned int chunk_type;
|
|
unsigned int chunk_size;
|
|
int skip_byte;
|
|
|
|
while (avio_read(pb, preamble, VQA_PREAMBLE_SIZE) == VQA_PREAMBLE_SIZE) {
|
|
chunk_type = AV_RB32(&preamble[0]);
|
|
chunk_size = AV_RB32(&preamble[4]);
|
|
|
|
skip_byte = chunk_size & 0x01;
|
|
|
|
if ((chunk_type == SND2_TAG || chunk_type == SND1_TAG) && wsvqa->audio_channels == 0) {
|
|
av_log(s, AV_LOG_ERROR, "audio chunk without any audio header information found\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
if ((chunk_type == SND1_TAG) || (chunk_type == SND2_TAG) || (chunk_type == VQFR_TAG)) {
|
|
|
|
ret= av_get_packet(pb, pkt, chunk_size);
|
|
if (ret<0)
|
|
return AVERROR(EIO);
|
|
|
|
if (chunk_type == SND2_TAG) {
|
|
pkt->stream_index = wsvqa->audio_stream_index;
|
|
/* 2 samples/byte, 1 or 2 samples per frame depending on stereo */
|
|
pkt->duration = (chunk_size * 2) / wsvqa->audio_channels;
|
|
} else if(chunk_type == SND1_TAG) {
|
|
pkt->stream_index = wsvqa->audio_stream_index;
|
|
/* unpacked size is stored in header */
|
|
pkt->duration = AV_RL16(pkt->data) / wsvqa->audio_channels;
|
|
} else {
|
|
pkt->stream_index = wsvqa->video_stream_index;
|
|
pkt->duration = 1;
|
|
}
|
|
/* stay on 16-bit alignment */
|
|
if (skip_byte)
|
|
avio_skip(pb, 1);
|
|
|
|
return ret;
|
|
} else {
|
|
switch(chunk_type){
|
|
case CMDS_TAG:
|
|
case SND0_TAG:
|
|
break;
|
|
default:
|
|
av_log(s, AV_LOG_INFO, "Skipping unknown chunk 0x%08X\n", chunk_type);
|
|
}
|
|
avio_skip(pb, chunk_size + skip_byte);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_wsvqa_demuxer = {
|
|
.name = "wsvqa",
|
|
.long_name = NULL_IF_CONFIG_SMALL("Westwood Studios VQA format"),
|
|
.priv_data_size = sizeof(WsVqaDemuxContext),
|
|
.read_probe = wsvqa_probe,
|
|
.read_header = wsvqa_read_header,
|
|
.read_packet = wsvqa_read_packet,
|
|
};
|