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7a72695c05
* commit '36ef5369ee9b336febc2c270f8718cec4476cb85': Replace all CODEC_ID_* with AV_CODEC_ID_* lavc: add AV prefix to codec ids. Conflicts: doc/APIchanges doc/examples/decoding_encoding.c doc/examples/muxing.c ffmpeg.c ffprobe.c ffserver.c libavcodec/8svx.c libavcodec/avcodec.h libavcodec/dnxhd_parser.c libavcodec/dvdsubdec.c libavcodec/error_resilience.c libavcodec/h263dec.c libavcodec/libvorbisenc.c libavcodec/mjpeg_parser.c libavcodec/mjpegenc.c libavcodec/mpeg12.c libavcodec/mpeg4videodec.c libavcodec/mpegvideo.c libavcodec/mpegvideo_enc.c libavcodec/pcm.c libavcodec/r210dec.c libavcodec/utils.c libavcodec/v210dec.c libavcodec/version.h libavdevice/alsa-audio-dec.c libavdevice/bktr.c libavdevice/v4l2.c libavformat/asfdec.c libavformat/asfenc.c libavformat/avformat.h libavformat/avidec.c libavformat/caf.c libavformat/electronicarts.c libavformat/flacdec.c libavformat/flvdec.c libavformat/flvenc.c libavformat/framecrcenc.c libavformat/img2.c libavformat/img2dec.c libavformat/img2enc.c libavformat/ipmovie.c libavformat/isom.c libavformat/matroska.c libavformat/matroskadec.c libavformat/matroskaenc.c libavformat/mov.c libavformat/movenc.c libavformat/mp3dec.c libavformat/mpeg.c libavformat/mpegts.c libavformat/mxf.c libavformat/mxfdec.c libavformat/mxfenc.c libavformat/nsvdec.c libavformat/nut.c libavformat/oggenc.c libavformat/pmpdec.c libavformat/rawdec.c libavformat/rawenc.c libavformat/riff.c libavformat/sdp.c libavformat/utils.c libavformat/vocenc.c libavformat/wtv.c libavformat/xmv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
91 lines
2.6 KiB
C
91 lines
2.6 KiB
C
/*
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* CRYO APC audio format demuxer
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* Copyright (c) 2007 Anssi Hannula <anssi.hannula@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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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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* 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
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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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* 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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#include <string.h>
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#include "avformat.h"
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static int apc_probe(AVProbeData *p)
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{
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if (!strncmp(p->buf, "CRYO_APC", 8))
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int apc_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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AVStream *st;
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avio_rl32(pb); /* CRYO */
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avio_rl32(pb); /* _APC */
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avio_rl32(pb); /* 1.20 */
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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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st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_APC;
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avio_rl32(pb); /* number of samples */
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st->codec->sample_rate = avio_rl32(pb);
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st->codec->extradata_size = 2 * 4;
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st->codec->extradata = av_malloc(st->codec->extradata_size +
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FF_INPUT_BUFFER_PADDING_SIZE);
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if (!st->codec->extradata)
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return AVERROR(ENOMEM);
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/* initial predictor values for adpcm decoder */
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avio_read(pb, st->codec->extradata, 2 * 4);
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st->codec->channels = 1;
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if (avio_rl32(pb))
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st->codec->channels = 2;
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st->codec->bits_per_coded_sample = 4;
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st->codec->bit_rate = st->codec->bits_per_coded_sample * st->codec->channels
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* st->codec->sample_rate;
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st->codec->block_align = 1;
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return 0;
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}
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#define MAX_READ_SIZE 4096
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static int apc_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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if (av_get_packet(s->pb, pkt, MAX_READ_SIZE) <= 0)
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return AVERROR(EIO);
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pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
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pkt->stream_index = 0;
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return 0;
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}
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AVInputFormat ff_apc_demuxer = {
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.name = "apc",
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.long_name = NULL_IF_CONFIG_SMALL("CRYO APC"),
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.read_probe = apc_probe,
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.read_header = apc_read_header,
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.read_packet = apc_read_packet,
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};
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