FFmpeg/libavformat/vocenc.c
Michael Niedermayer b5da7d4c1a Merge remote-tracking branch 'qatar/master'
* qatar/master:
  avformat: Drop pointless "format" from container long names
  swscale: bury one more piece of inline asm under HAVE_INLINE_ASM.
  wv: K&R formatting cosmetics
  configure: Add missing descriptions to help output
  h264_ps: declare array of colorspace strings on its own line.
  fate: amix: specify f32 sample format for comparison
  tiny_psnr: support 32-bit float samples
  eamad/eatgq/eatqi: call special EA IDCT directly
  eamad: remove use of MpegEncContext
  mpegvideo: remove unnecessary inclusions of faandct.h
  af_asyncts: avoid overflow in out_size with large delta values
  af_asyncts: add first_pts option

Conflicts:
	configure
	libavcodec/eamad.c
	libavcodec/h264_ps.c
	libavformat/crcenc.c
	libavformat/ffmdec.c
	libavformat/ffmenc.c
	libavformat/framecrcenc.c
	libavformat/md5enc.c
	libavformat/nutdec.c
	libavformat/rawenc.c
	libavformat/yuv4mpeg.c
	tests/tiny_psnr.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2012-07-30 23:28:31 +02:00

105 lines
3.3 KiB
C

/*
* 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;
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;
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),
.audio_codec = CODEC_ID_PCM_S16LE,
.video_codec = 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 },
};