2003-05-25 05:07:36 +00:00
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/*
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* 4X Technologies .4xm File Demuxer (no muxer)
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* Copyright (c) 2003 The ffmpeg Project
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*
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2011-03-18 17:35:10 +00:00
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* This file is part of Libav.
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2006-10-07 15:30:46 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* Libav is free software; you can redistribute it and/or
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2003-05-25 05:07:36 +00:00
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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2006-10-07 15:30:46 +00:00
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* version 2.1 of the License, or (at your option) any later version.
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2003-05-25 05:07:36 +00:00
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*
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2011-03-18 17:35:10 +00:00
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* Libav is distributed in the hope that it will be useful,
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2003-05-25 05:07:36 +00:00
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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2011-03-18 17:35:10 +00:00
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* License along with Libav; if not, write to the Free Software
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2006-01-12 22:43:26 +00:00
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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2003-05-25 05:07:36 +00:00
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*/
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/**
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2010-04-20 14:45:34 +00:00
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* @file
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2003-05-25 05:07:36 +00:00
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* 4X Technologies file demuxer
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* by Mike Melanson (melanson@pcisys.net)
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* for more information on the .4xm file format, visit:
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* http://www.pcisys.net/~melanson/codecs/
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*/
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2009-01-11 22:19:48 +00:00
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#include "libavutil/intreadwrite.h"
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2011-11-27 14:04:16 +00:00
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#include "libavutil/intfloat.h"
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2003-05-25 05:07:36 +00:00
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#include "avformat.h"
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2011-11-29 18:28:15 +00:00
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#include "internal.h"
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2003-05-25 05:07:36 +00:00
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2009-01-11 21:08:52 +00:00
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#define RIFF_TAG MKTAG('R', 'I', 'F', 'F')
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2009-01-11 21:07:12 +00:00
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#define FOURXMV_TAG MKTAG('4', 'X', 'M', 'V')
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2009-01-11 21:08:52 +00:00
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#define LIST_TAG MKTAG('L', 'I', 'S', 'T')
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#define HEAD_TAG MKTAG('H', 'E', 'A', 'D')
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#define TRK__TAG MKTAG('T', 'R', 'K', '_')
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#define MOVI_TAG MKTAG('M', 'O', 'V', 'I')
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#define VTRK_TAG MKTAG('V', 'T', 'R', 'K')
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#define STRK_TAG MKTAG('S', 'T', 'R', 'K')
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#define std__TAG MKTAG('s', 't', 'd', '_')
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#define name_TAG MKTAG('n', 'a', 'm', 'e')
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#define vtrk_TAG MKTAG('v', 't', 'r', 'k')
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#define strk_TAG MKTAG('s', 't', 'r', 'k')
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#define ifrm_TAG MKTAG('i', 'f', 'r', 'm')
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#define pfrm_TAG MKTAG('p', 'f', 'r', 'm')
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#define cfrm_TAG MKTAG('c', 'f', 'r', 'm')
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#define ifr2_TAG MKTAG('i', 'f', 'r', '2')
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#define pfr2_TAG MKTAG('p', 'f', 'r', '2')
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#define cfr2_TAG MKTAG('c', 'f', 'r', '2')
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#define snd__TAG MKTAG('s', 'n', 'd', '_')
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2003-05-25 05:07:36 +00:00
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#define vtrk_SIZE 0x44
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#define strk_SIZE 0x28
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#define GET_LIST_HEADER() \
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2011-02-21 15:43:01 +00:00
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fourcc_tag = avio_rl32(pb); \
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2013-06-05 15:32:49 +00:00
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size = avio_rl32(pb); \
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2003-05-25 05:07:36 +00:00
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if (fourcc_tag != LIST_TAG) \
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return AVERROR_INVALIDDATA; \
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2011-02-21 15:43:01 +00:00
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fourcc_tag = avio_rl32(pb);
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2003-05-25 05:07:36 +00:00
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typedef struct AudioTrack {
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int sample_rate;
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int bits;
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int channels;
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2003-05-28 02:41:24 +00:00
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int stream_index;
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2003-06-03 13:58:44 +00:00
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int adpcm;
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2009-01-27 22:14:48 +00:00
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int64_t audio_pts;
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2003-05-25 05:07:36 +00:00
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} AudioTrack;
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typedef struct FourxmDemuxContext {
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2003-05-28 02:41:24 +00:00
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int video_stream_index;
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2003-05-25 05:07:36 +00:00
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int track_count;
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AudioTrack *tracks;
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2003-05-28 02:41:24 +00:00
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2003-11-15 18:18:42 +00:00
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int64_t video_pts;
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2003-11-16 14:26:50 +00:00
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float fps;
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2003-05-25 05:07:36 +00:00
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} FourxmDemuxContext;
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static int fourxm_probe(AVProbeData *p)
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{
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2007-01-19 22:12:59 +00:00
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if ((AV_RL32(&p->buf[0]) != RIFF_TAG) ||
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2009-01-11 21:07:12 +00:00
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(AV_RL32(&p->buf[8]) != FOURXMV_TAG))
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2003-05-25 05:07:36 +00:00
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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2013-06-05 16:45:45 +00:00
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static int parse_vtrk(AVFormatContext *s,
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2013-06-05 16:56:28 +00:00
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FourxmDemuxContext *fourxm, uint8_t *buf, int size,
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int left)
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2013-06-05 16:45:45 +00:00
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{
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AVStream *st;
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/* check that there is enough data */
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2013-06-05 16:56:28 +00:00
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if (size != vtrk_SIZE || left < size + 8) {
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2013-06-05 16:45:45 +00:00
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return AVERROR_INVALIDDATA;
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}
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/* allocate a new AVStream */
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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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avpriv_set_pts_info(st, 60, 1, fourxm->fps);
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fourxm->video_stream_index = st->index;
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lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
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st->codecpar->codec_id = AV_CODEC_ID_4XM;
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2014-05-03 06:50:41 +00:00
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lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
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st->codecpar->extradata = av_mallocz(4 + AV_INPUT_BUFFER_PADDING_SIZE);
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if (!st->codecpar->extradata)
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2014-05-03 06:50:41 +00:00
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return AVERROR(ENOMEM);
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
st->codecpar->extradata_size = 4;
|
|
|
|
AV_WL32(st->codecpar->extradata, AV_RL32(buf + 16));
|
|
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|
st->codecpar->width = AV_RL32(buf + 36);
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st->codecpar->height = AV_RL32(buf + 40);
|
2013-06-05 16:45:45 +00:00
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|
return 0;
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|
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}
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static int parse_strk(AVFormatContext *s,
|
2013-06-05 16:56:28 +00:00
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FourxmDemuxContext *fourxm, uint8_t *buf, int size,
|
|
|
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int left)
|
2013-06-05 16:45:45 +00:00
|
|
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{
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|
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AVStream *st;
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int track;
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/* check that there is enough data */
|
2013-06-05 16:56:28 +00:00
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|
if (size != strk_SIZE || left < size + 8)
|
2013-06-05 16:45:45 +00:00
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return AVERROR_INVALIDDATA;
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track = AV_RL32(buf + 8);
|
2013-09-03 10:53:23 +00:00
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|
if (track < 0)
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return AVERROR_INVALIDDATA;
|
2013-06-05 16:45:45 +00:00
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|
if (track + 1 > fourxm->track_count) {
|
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|
if (av_reallocp_array(&fourxm->tracks, track + 1, sizeof(AudioTrack)))
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
memset(&fourxm->tracks[fourxm->track_count], 0,
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|
sizeof(AudioTrack) * (track + 1 - fourxm->track_count));
|
|
|
|
fourxm->track_count = track + 1;
|
|
|
|
}
|
|
|
|
fourxm->tracks[track].adpcm = AV_RL32(buf + 12);
|
|
|
|
fourxm->tracks[track].channels = AV_RL32(buf + 36);
|
|
|
|
fourxm->tracks[track].sample_rate = AV_RL32(buf + 40);
|
|
|
|
fourxm->tracks[track].bits = AV_RL32(buf + 44);
|
|
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|
fourxm->tracks[track].audio_pts = 0;
|
|
|
|
|
|
|
|
if (fourxm->tracks[track].channels <= 0 ||
|
|
|
|
fourxm->tracks[track].sample_rate <= 0 ||
|
2013-08-24 19:30:46 +00:00
|
|
|
fourxm->tracks[track].bits <= 0) {
|
2013-06-05 16:45:45 +00:00
|
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|
av_log(s, AV_LOG_ERROR, "audio header invalid\n");
|
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
}
|
|
|
|
/* allocate a new AVStream */
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
|
|
if (!st)
|
|
|
|
return AVERROR(ENOMEM);
|
|
|
|
|
|
|
|
st->id = track;
|
|
|
|
avpriv_set_pts_info(st, 60, 1, fourxm->tracks[track].sample_rate);
|
|
|
|
|
|
|
|
fourxm->tracks[track].stream_index = st->index;
|
|
|
|
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
|
|
|
|
st->codecpar->codec_tag = 0;
|
|
|
|
st->codecpar->channels = fourxm->tracks[track].channels;
|
|
|
|
st->codecpar->sample_rate = fourxm->tracks[track].sample_rate;
|
|
|
|
st->codecpar->bits_per_coded_sample = fourxm->tracks[track].bits;
|
|
|
|
st->codecpar->bit_rate = st->codecpar->channels *
|
|
|
|
st->codecpar->sample_rate *
|
|
|
|
st->codecpar->bits_per_coded_sample;
|
|
|
|
st->codecpar->block_align = st->codecpar->channels *
|
|
|
|
st->codecpar->bits_per_coded_sample;
|
2013-06-05 16:45:45 +00:00
|
|
|
|
|
|
|
if (fourxm->tracks[track].adpcm){
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
st->codecpar->codec_id = AV_CODEC_ID_ADPCM_4XM;
|
|
|
|
} else if (st->codecpar->bits_per_coded_sample == 8) {
|
|
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_U8;
|
2013-06-05 16:45:45 +00:00
|
|
|
} else
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE;
|
2013-06-05 16:45:45 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-01-12 12:20:36 +00:00
|
|
|
static int fourxm_read_header(AVFormatContext *s)
|
2003-05-25 05:07:36 +00:00
|
|
|
{
|
2011-02-20 10:04:12 +00:00
|
|
|
AVIOContext *pb = s->pb;
|
2003-05-25 05:07:36 +00:00
|
|
|
unsigned int fourcc_tag;
|
|
|
|
unsigned int size;
|
|
|
|
int header_size;
|
2007-04-08 20:24:16 +00:00
|
|
|
FourxmDemuxContext *fourxm = s->priv_data;
|
2003-05-25 05:07:36 +00:00
|
|
|
unsigned char *header;
|
2009-01-27 21:56:28 +00:00
|
|
|
int i, ret;
|
2003-05-25 05:07:36 +00:00
|
|
|
|
|
|
|
fourxm->track_count = 0;
|
2013-06-05 15:32:49 +00:00
|
|
|
fourxm->tracks = NULL;
|
|
|
|
fourxm->fps = 1.0;
|
2003-05-25 05:07:36 +00:00
|
|
|
|
|
|
|
/* skip the first 3 32-bit numbers */
|
2011-03-15 08:14:38 +00:00
|
|
|
avio_skip(pb, 12);
|
2003-05-25 05:07:36 +00:00
|
|
|
|
|
|
|
/* check for LIST-HEAD */
|
|
|
|
GET_LIST_HEADER();
|
|
|
|
header_size = size - 4;
|
2009-01-27 21:01:47 +00:00
|
|
|
if (fourcc_tag != HEAD_TAG || header_size < 0)
|
2003-05-25 05:07:36 +00:00
|
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
|
|
|
|
/* allocate space for the header and load the whole thing */
|
|
|
|
header = av_malloc(header_size);
|
|
|
|
if (!header)
|
2007-07-19 15:21:30 +00:00
|
|
|
return AVERROR(ENOMEM);
|
2013-06-05 15:32:49 +00:00
|
|
|
if (avio_read(pb, header, header_size) != header_size) {
|
2009-01-27 21:06:19 +00:00
|
|
|
av_free(header);
|
2007-07-19 15:23:32 +00:00
|
|
|
return AVERROR(EIO);
|
2009-01-27 21:06:19 +00:00
|
|
|
}
|
2003-05-25 05:07:36 +00:00
|
|
|
|
|
|
|
/* take the lazy approach and search for any and all vtrk and strk chunks */
|
|
|
|
for (i = 0; i < header_size - 8; i++) {
|
2007-01-19 22:12:59 +00:00
|
|
|
fourcc_tag = AV_RL32(&header[i]);
|
2013-06-05 15:32:49 +00:00
|
|
|
size = AV_RL32(&header[i + 4]);
|
2003-05-25 05:07:36 +00:00
|
|
|
|
2003-11-15 18:18:42 +00:00
|
|
|
if (fourcc_tag == std__TAG) {
|
2013-06-05 16:56:28 +00:00
|
|
|
if (header_size - i < 16) {
|
|
|
|
ret = AVERROR_INVALIDDATA;
|
|
|
|
goto fail;
|
|
|
|
}
|
2011-11-27 14:04:16 +00:00
|
|
|
fourxm->fps = av_int2float(AV_RL32(&header[i + 12]));
|
2003-11-15 18:18:42 +00:00
|
|
|
} else if (fourcc_tag == vtrk_TAG) {
|
2013-06-05 16:56:28 +00:00
|
|
|
if ((ret = parse_vtrk(s, fourxm, header + i, size,
|
|
|
|
header_size - i)) < 0)
|
2009-01-27 21:56:28 +00:00
|
|
|
goto fail;
|
2003-05-28 02:41:24 +00:00
|
|
|
|
2007-08-13 00:44:35 +00:00
|
|
|
i += 8 + size;
|
2003-05-25 05:07:36 +00:00
|
|
|
} else if (fourcc_tag == strk_TAG) {
|
2013-06-05 16:56:28 +00:00
|
|
|
if ((ret = parse_strk(s, fourxm, header + i, size,
|
|
|
|
header_size - i)) < 0)
|
2009-01-27 21:56:28 +00:00
|
|
|
goto fail;
|
2003-05-28 02:41:24 +00:00
|
|
|
|
2013-06-05 16:45:45 +00:00
|
|
|
i += 8 + size;
|
2003-05-25 05:07:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* skip over the LIST-MOVI chunk (which is where the stream should be */
|
|
|
|
GET_LIST_HEADER();
|
2013-06-05 15:32:49 +00:00
|
|
|
if (fourcc_tag != MOVI_TAG) {
|
|
|
|
ret = AVERROR_INVALIDDATA;
|
2009-01-27 21:56:28 +00:00
|
|
|
goto fail;
|
|
|
|
}
|
2003-05-25 05:07:36 +00:00
|
|
|
|
2009-01-27 21:56:28 +00:00
|
|
|
av_free(header);
|
2003-05-28 02:41:24 +00:00
|
|
|
/* initialize context members */
|
2005-04-26 10:01:17 +00:00
|
|
|
fourxm->video_pts = -1; /* first frame will push to 0 */
|
2003-05-28 02:41:24 +00:00
|
|
|
|
2003-05-25 05:07:36 +00:00
|
|
|
return 0;
|
2009-01-27 21:56:28 +00:00
|
|
|
fail:
|
|
|
|
av_freep(&fourxm->tracks);
|
|
|
|
av_free(header);
|
|
|
|
return ret;
|
2003-05-25 05:07:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static int fourxm_read_packet(AVFormatContext *s,
|
2003-05-28 02:41:24 +00:00
|
|
|
AVPacket *pkt)
|
2003-05-25 05:07:36 +00:00
|
|
|
{
|
|
|
|
FourxmDemuxContext *fourxm = s->priv_data;
|
2013-06-05 15:32:49 +00:00
|
|
|
AVIOContext *pb = s->pb;
|
2003-05-25 05:07:36 +00:00
|
|
|
unsigned int fourcc_tag;
|
2011-06-01 16:26:27 +00:00
|
|
|
unsigned int size;
|
2003-05-25 05:07:36 +00:00
|
|
|
int ret = 0;
|
2009-01-27 22:14:48 +00:00
|
|
|
unsigned int track_number;
|
2003-05-25 05:07:36 +00:00
|
|
|
int packet_read = 0;
|
2003-05-28 02:41:24 +00:00
|
|
|
unsigned char header[8];
|
2003-11-15 18:18:42 +00:00
|
|
|
int audio_frame_count;
|
2003-05-25 05:07:36 +00:00
|
|
|
|
|
|
|
while (!packet_read) {
|
2011-02-21 15:43:01 +00:00
|
|
|
if ((ret = avio_read(s->pb, header, 8)) < 0)
|
2003-05-28 02:41:24 +00:00
|
|
|
return ret;
|
2007-01-19 22:12:59 +00:00
|
|
|
fourcc_tag = AV_RL32(&header[0]);
|
2013-06-05 15:32:49 +00:00
|
|
|
size = AV_RL32(&header[4]);
|
2011-03-07 20:50:25 +00:00
|
|
|
if (pb->eof_reached)
|
2007-07-19 15:23:32 +00:00
|
|
|
return AVERROR(EIO);
|
2003-05-25 05:07:36 +00:00
|
|
|
switch (fourcc_tag) {
|
2003-05-28 23:50:00 +00:00
|
|
|
case LIST_TAG:
|
2003-11-15 18:18:42 +00:00
|
|
|
/* this is a good time to bump the video pts */
|
2013-06-05 15:32:49 +00:00
|
|
|
fourxm->video_pts++;
|
2003-11-15 18:18:42 +00:00
|
|
|
|
2003-05-28 23:50:00 +00:00
|
|
|
/* skip the LIST-* tag and move on to the next fourcc */
|
2011-02-21 15:43:01 +00:00
|
|
|
avio_rl32(pb);
|
2003-05-28 23:50:00 +00:00
|
|
|
break;
|
|
|
|
|
2003-05-25 05:07:36 +00:00
|
|
|
case ifrm_TAG:
|
|
|
|
case pfrm_TAG:
|
2007-08-12 00:23:47 +00:00
|
|
|
case cfrm_TAG:
|
|
|
|
case ifr2_TAG:
|
|
|
|
case pfr2_TAG:
|
|
|
|
case cfr2_TAG:
|
2003-05-28 02:41:24 +00:00
|
|
|
/* allocate 8 more bytes than 'size' to account for fourcc
|
|
|
|
* and size */
|
2005-01-12 00:16:25 +00:00
|
|
|
if (size + 8 < size || av_new_packet(pkt, size + 8))
|
2007-07-19 15:23:32 +00:00
|
|
|
return AVERROR(EIO);
|
2003-05-28 02:41:24 +00:00
|
|
|
pkt->stream_index = fourxm->video_stream_index;
|
2013-06-05 15:32:49 +00:00
|
|
|
pkt->pts = fourxm->video_pts;
|
|
|
|
pkt->pos = avio_tell(s->pb);
|
2003-05-28 02:41:24 +00:00
|
|
|
memcpy(pkt->data, header, 8);
|
2011-02-21 15:43:01 +00:00
|
|
|
ret = avio_read(s->pb, &pkt->data[8], size);
|
2003-05-28 02:41:24 +00:00
|
|
|
|
2013-06-05 15:32:49 +00:00
|
|
|
if (ret < 0) {
|
2015-10-23 09:11:31 +00:00
|
|
|
av_packet_unref(pkt);
|
2013-06-05 15:32:49 +00:00
|
|
|
} else
|
2003-05-28 02:41:24 +00:00
|
|
|
packet_read = 1;
|
2003-05-25 23:41:25 +00:00
|
|
|
break;
|
2003-05-28 02:41:24 +00:00
|
|
|
|
2003-05-25 05:07:36 +00:00
|
|
|
case snd__TAG:
|
2011-02-21 15:43:01 +00:00
|
|
|
track_number = avio_rl32(pb);
|
2011-06-01 16:26:27 +00:00
|
|
|
avio_skip(pb, 4);
|
2013-06-05 15:32:49 +00:00
|
|
|
size -= 8;
|
2003-06-03 13:58:44 +00:00
|
|
|
|
2013-06-05 15:32:49 +00:00
|
|
|
if (track_number < fourxm->track_count &&
|
|
|
|
fourxm->tracks[track_number].channels > 0) {
|
|
|
|
ret = av_get_packet(s->pb, pkt, size);
|
|
|
|
if (ret < 0)
|
2007-07-19 15:23:32 +00:00
|
|
|
return AVERROR(EIO);
|
2005-12-17 18:14:38 +00:00
|
|
|
pkt->stream_index =
|
2009-01-27 22:14:48 +00:00
|
|
|
fourxm->tracks[track_number].stream_index;
|
2013-06-05 15:32:49 +00:00
|
|
|
pkt->pts = fourxm->tracks[track_number].audio_pts;
|
2005-05-26 20:17:12 +00:00
|
|
|
packet_read = 1;
|
2003-05-28 02:41:24 +00:00
|
|
|
|
2003-11-15 18:18:42 +00:00
|
|
|
/* pts accounting */
|
|
|
|
audio_frame_count = size;
|
2009-01-27 22:14:48 +00:00
|
|
|
if (fourxm->tracks[track_number].adpcm)
|
2013-06-05 15:32:49 +00:00
|
|
|
audio_frame_count -= 2 * (fourxm->tracks[track_number].channels);
|
|
|
|
audio_frame_count /= fourxm->tracks[track_number].channels;
|
|
|
|
if (fourxm->tracks[track_number].adpcm) {
|
2003-11-15 18:18:42 +00:00
|
|
|
audio_frame_count *= 2;
|
2013-06-05 15:32:49 +00:00
|
|
|
} else
|
2003-11-15 18:18:42 +00:00
|
|
|
audio_frame_count /=
|
2013-06-05 15:32:49 +00:00
|
|
|
(fourxm->tracks[track_number].bits / 8);
|
2009-01-27 22:14:48 +00:00
|
|
|
fourxm->tracks[track_number].audio_pts += audio_frame_count;
|
2003-05-25 05:07:36 +00:00
|
|
|
} else {
|
2011-03-15 08:14:38 +00:00
|
|
|
avio_skip(pb, size);
|
2003-05-25 05:07:36 +00:00
|
|
|
}
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2011-03-15 08:14:38 +00:00
|
|
|
avio_skip(pb, size);
|
2003-05-25 05:07:36 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int fourxm_read_close(AVFormatContext *s)
|
|
|
|
{
|
2007-04-08 20:24:16 +00:00
|
|
|
FourxmDemuxContext *fourxm = s->priv_data;
|
2003-05-25 05:07:36 +00:00
|
|
|
|
2009-01-27 22:21:28 +00:00
|
|
|
av_freep(&fourxm->tracks);
|
2003-05-25 05:07:36 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-01-25 22:03:28 +00:00
|
|
|
AVInputFormat ff_fourxm_demuxer = {
|
2011-07-16 20:18:12 +00:00
|
|
|
.name = "4xm",
|
2012-07-24 21:51:41 +00:00
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("4X Technologies"),
|
2011-07-16 20:18:12 +00:00
|
|
|
.priv_data_size = sizeof(FourxmDemuxContext),
|
|
|
|
.read_probe = fourxm_probe,
|
|
|
|
.read_header = fourxm_read_header,
|
|
|
|
.read_packet = fourxm_read_packet,
|
|
|
|
.read_close = fourxm_read_close,
|
2003-05-25 05:07:36 +00:00
|
|
|
};
|