forked from KolibriOS/kolibrios
245 lines
8.0 KiB
C
245 lines
8.0 KiB
C
/*
|
|
* id RoQ (.roq) File 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
|
|
* id RoQ format file demuxer
|
|
* by Mike Melanson (melanson@pcisys.net)
|
|
* for more information on the .roq file format, visit:
|
|
* http://www.csse.monash.edu.au/~timf/
|
|
*/
|
|
|
|
#include "libavutil/channel_layout.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "avio_internal.h"
|
|
|
|
#define RoQ_MAGIC_NUMBER 0x1084
|
|
#define RoQ_CHUNK_PREAMBLE_SIZE 8
|
|
#define RoQ_AUDIO_SAMPLE_RATE 22050
|
|
#define RoQ_CHUNKS_TO_SCAN 30
|
|
|
|
#define RoQ_INFO 0x1001
|
|
#define RoQ_QUAD_CODEBOOK 0x1002
|
|
#define RoQ_QUAD_VQ 0x1011
|
|
#define RoQ_SOUND_MONO 0x1020
|
|
#define RoQ_SOUND_STEREO 0x1021
|
|
|
|
typedef struct RoqDemuxContext {
|
|
|
|
int frame_rate;
|
|
int width;
|
|
int height;
|
|
int audio_channels;
|
|
|
|
int video_stream_index;
|
|
int audio_stream_index;
|
|
|
|
int64_t video_pts;
|
|
unsigned int audio_frame_count;
|
|
|
|
} RoqDemuxContext;
|
|
|
|
static int roq_probe(AVProbeData *p)
|
|
{
|
|
if ((AV_RL16(&p->buf[0]) != RoQ_MAGIC_NUMBER) ||
|
|
(AV_RL32(&p->buf[2]) != 0xFFFFFFFF))
|
|
return 0;
|
|
|
|
return AVPROBE_SCORE_MAX;
|
|
}
|
|
|
|
static int roq_read_header(AVFormatContext *s)
|
|
{
|
|
RoqDemuxContext *roq = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
|
|
|
|
/* get the main header */
|
|
if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
|
|
RoQ_CHUNK_PREAMBLE_SIZE)
|
|
return AVERROR(EIO);
|
|
roq->frame_rate = AV_RL16(&preamble[6]);
|
|
|
|
/* init private context parameters */
|
|
roq->width = roq->height = roq->audio_channels = roq->video_pts =
|
|
roq->audio_frame_count = 0;
|
|
roq->audio_stream_index = -1;
|
|
roq->video_stream_index = -1;
|
|
|
|
s->ctx_flags |= AVFMTCTX_NOHEADER;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int roq_read_packet(AVFormatContext *s,
|
|
AVPacket *pkt)
|
|
{
|
|
RoqDemuxContext *roq = s->priv_data;
|
|
AVIOContext *pb = s->pb;
|
|
int ret = 0;
|
|
unsigned int chunk_size;
|
|
unsigned int chunk_type;
|
|
unsigned int codebook_size;
|
|
unsigned char preamble[RoQ_CHUNK_PREAMBLE_SIZE];
|
|
int packet_read = 0;
|
|
int64_t codebook_offset;
|
|
|
|
while (!packet_read) {
|
|
|
|
if (url_feof(s->pb))
|
|
return AVERROR(EIO);
|
|
|
|
/* get the next chunk preamble */
|
|
if ((ret = avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE)) !=
|
|
RoQ_CHUNK_PREAMBLE_SIZE)
|
|
return AVERROR(EIO);
|
|
|
|
chunk_type = AV_RL16(&preamble[0]);
|
|
chunk_size = AV_RL32(&preamble[2]);
|
|
if(chunk_size > INT_MAX)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
chunk_size = ffio_limit(pb, chunk_size);
|
|
|
|
switch (chunk_type) {
|
|
|
|
case RoQ_INFO:
|
|
if (roq->video_stream_index == -1) {
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
avpriv_set_pts_info(st, 63, 1, roq->frame_rate);
|
|
roq->video_stream_index = st->index;
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = AV_CODEC_ID_ROQ;
|
|
st->codec->codec_tag = 0; /* no fourcc */
|
|
|
|
if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) != RoQ_CHUNK_PREAMBLE_SIZE)
|
|
return AVERROR(EIO);
|
|
st->codec->width = roq->width = AV_RL16(preamble);
|
|
st->codec->height = roq->height = AV_RL16(preamble + 2);
|
|
break;
|
|
}
|
|
/* don't care about this chunk anymore */
|
|
avio_skip(pb, RoQ_CHUNK_PREAMBLE_SIZE);
|
|
break;
|
|
|
|
case RoQ_QUAD_CODEBOOK:
|
|
if (roq->video_stream_index < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
/* packet needs to contain both this codebook and next VQ chunk */
|
|
codebook_offset = avio_tell(pb) - RoQ_CHUNK_PREAMBLE_SIZE;
|
|
codebook_size = chunk_size;
|
|
avio_skip(pb, codebook_size);
|
|
if (avio_read(pb, preamble, RoQ_CHUNK_PREAMBLE_SIZE) !=
|
|
RoQ_CHUNK_PREAMBLE_SIZE)
|
|
return AVERROR(EIO);
|
|
chunk_size = AV_RL32(&preamble[2]) + RoQ_CHUNK_PREAMBLE_SIZE * 2 +
|
|
codebook_size;
|
|
|
|
/* rewind */
|
|
avio_seek(pb, codebook_offset, SEEK_SET);
|
|
|
|
/* load up the packet */
|
|
ret= av_get_packet(pb, pkt, chunk_size);
|
|
if (ret != chunk_size)
|
|
return AVERROR(EIO);
|
|
pkt->stream_index = roq->video_stream_index;
|
|
pkt->pts = roq->video_pts++;
|
|
|
|
packet_read = 1;
|
|
break;
|
|
|
|
case RoQ_SOUND_MONO:
|
|
case RoQ_SOUND_STEREO:
|
|
if (roq->audio_stream_index == -1) {
|
|
AVStream *st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
avpriv_set_pts_info(st, 32, 1, RoQ_AUDIO_SAMPLE_RATE);
|
|
roq->audio_stream_index = st->index;
|
|
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
st->codec->codec_id = AV_CODEC_ID_ROQ_DPCM;
|
|
st->codec->codec_tag = 0; /* no tag */
|
|
if (chunk_type == RoQ_SOUND_STEREO) {
|
|
st->codec->channels = 2;
|
|
st->codec->channel_layout = AV_CH_LAYOUT_STEREO;
|
|
} else {
|
|
st->codec->channels = 1;
|
|
st->codec->channel_layout = AV_CH_LAYOUT_MONO;
|
|
}
|
|
roq->audio_channels = st->codec->channels;
|
|
st->codec->sample_rate = RoQ_AUDIO_SAMPLE_RATE;
|
|
st->codec->bits_per_coded_sample = 16;
|
|
st->codec->bit_rate = st->codec->channels * st->codec->sample_rate *
|
|
st->codec->bits_per_coded_sample;
|
|
st->codec->block_align = st->codec->channels * st->codec->bits_per_coded_sample;
|
|
}
|
|
case RoQ_QUAD_VQ:
|
|
if (chunk_type == RoQ_QUAD_VQ) {
|
|
if (roq->video_stream_index < 0)
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
|
|
/* load up the packet */
|
|
if (av_new_packet(pkt, chunk_size + RoQ_CHUNK_PREAMBLE_SIZE))
|
|
return AVERROR(EIO);
|
|
/* copy over preamble */
|
|
memcpy(pkt->data, preamble, RoQ_CHUNK_PREAMBLE_SIZE);
|
|
|
|
if (chunk_type == RoQ_QUAD_VQ) {
|
|
pkt->stream_index = roq->video_stream_index;
|
|
pkt->pts = roq->video_pts++;
|
|
} else {
|
|
pkt->stream_index = roq->audio_stream_index;
|
|
pkt->pts = roq->audio_frame_count;
|
|
roq->audio_frame_count += (chunk_size / roq->audio_channels);
|
|
}
|
|
|
|
pkt->pos= avio_tell(pb);
|
|
ret = avio_read(pb, pkt->data + RoQ_CHUNK_PREAMBLE_SIZE,
|
|
chunk_size);
|
|
if (ret != chunk_size)
|
|
ret = AVERROR(EIO);
|
|
|
|
packet_read = 1;
|
|
break;
|
|
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, " unknown RoQ chunk (%04X)\n", chunk_type);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
AVInputFormat ff_roq_demuxer = {
|
|
.name = "roq",
|
|
.long_name = NULL_IF_CONFIG_SMALL("id RoQ"),
|
|
.priv_data_size = sizeof(RoqDemuxContext),
|
|
.read_probe = roq_probe,
|
|
.read_header = roq_read_header,
|
|
.read_packet = roq_read_packet,
|
|
};
|