FFmpeg/libavformat/vocenc.c

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/*
* Creative Voice File muxer.
* Copyright (c) 2006 Aurelien Jacobs <aurel@gnuage.org>
*
* 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
*/
#include "voc.h"
#include "internal.h"
typedef struct voc_enc_context {
int param_written;
} VocEncContext;
static int voc_write_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AVCodecContext *enc = s->streams[0]->codec;
const int header_size = 26;
const int version = 0x0114;
if (s->nb_streams != 1
|| s->streams[0]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
return AVERROR_PATCHWELCOME;
if (!enc->codec_tag && enc->codec_id != AV_CODEC_ID_PCM_U8) {
av_log(s, AV_LOG_ERROR, "unsupported codec\n");
return AVERROR(EINVAL);
}
avio_write(pb, ff_voc_magic, sizeof(ff_voc_magic) - 1);
avio_wl16(pb, header_size);
avio_wl16(pb, version);
avio_wl16(pb, ~version + 0x1234);
return 0;
}
static int voc_write_packet(AVFormatContext *s, AVPacket *pkt)
{
VocEncContext *voc = s->priv_data;
AVCodecContext *enc = s->streams[0]->codec;
AVIOContext *pb = s->pb;
if (!voc->param_written) {
if (enc->codec_tag > 3) {
avio_w8(pb, VOC_TYPE_NEW_VOICE_DATA);
avio_wl24(pb, pkt->size + 12);
avio_wl32(pb, enc->sample_rate);
avio_w8(pb, enc->bits_per_coded_sample);
avio_w8(pb, enc->channels);
avio_wl16(pb, enc->codec_tag);
avio_wl32(pb, 0);
} else {
if (s->streams[0]->codec->channels > 1) {
avio_w8(pb, VOC_TYPE_EXTENDED);
avio_wl24(pb, 4);
avio_wl16(pb, 65536-(256000000 + enc->sample_rate*enc->channels/2)/(enc->sample_rate*enc->channels));
avio_w8(pb, enc->codec_tag);
avio_w8(pb, enc->channels - 1);
}
avio_w8(pb, VOC_TYPE_VOICE_DATA);
avio_wl24(pb, pkt->size + 2);
avio_w8(pb, 256 - (1000000 + enc->sample_rate/2) / enc->sample_rate);
avio_w8(pb, enc->codec_tag);
}
voc->param_written = 1;
} else {
avio_w8(pb, VOC_TYPE_VOICE_DATA_CONT);
avio_wl24(pb, pkt->size);
}
avio_write(pb, pkt->data, pkt->size);
return 0;
}
static int voc_write_trailer(AVFormatContext *s)
{
avio_w8(s->pb, 0);
return 0;
}
AVOutputFormat ff_voc_muxer = {
.name = "voc",
.long_name = NULL_IF_CONFIG_SMALL("Creative Voice"),
.mime_type = "audio/x-voc",
.extensions = "voc",
.priv_data_size = sizeof(VocEncContext),
Merge commit '36ef5369ee9b336febc2c270f8718cec4476cb85' * 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>
2012-08-07 20:45:46 +00:00
.audio_codec = AV_CODEC_ID_PCM_S16LE,
.video_codec = AV_CODEC_ID_NONE,
.write_header = voc_write_header,
.write_packet = voc_write_packet,
.write_trailer = voc_write_trailer,
.codec_tag = (const AVCodecTag* const []){ ff_voc_codec_tags, 0 },
};