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FFmpeg/libavformat/aiffenc.c
Michael Niedermayer 7fad19a63d Merge remote-tracking branch 'qatar/master'
* qatar/master:
  x86: cabac: replace explicit memory references with "m" operands
  avplay: don't request a stereo downmix
  wmapro: use av_float2int()
  lavc: avoid invalid memcpy() in avcodec_default_release_buffer()
  lavu: replace int/float punning functions
  lavfi: install libavfilter/vsrc_buffer.h
  Remove extraneous semicolons
  sdp: Restore the original mp4 format h264 extradata if converted
  rtpenc: Add support for mp4 format h264
  rtpenc: Simplify code by introducing a separate end pointer
  movenc: Use the actual converted sample for RTP hinting
  Fix a bunch of common typos.

Conflicts:
	doc/developer.texi
	doc/eval.texi
	doc/filters.texi
	doc/protocols.texi
	ffmpeg.c
	ffplay.c
	libavcodec/mpegvideo.h
	libavcodec/x86/cabac.h
	libavfilter/Makefile
	libavformat/avformat.h
	libavformat/cafdec.c
	libavformat/flvdec.c
	libavformat/flvenc.c
	libavformat/gxfenc.c
	libavformat/img2.c
	libavformat/movenc.c
	libavformat/mpegts.c
	libavformat/rtpenc_h264.c
	libavformat/utils.c
	libavformat/wtv.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-12-12 01:25:37 +01:00

172 lines
5.0 KiB
C

/*
* AIFF/AIFF-C muxer
* Copyright (c) 2006 Patrick Guimond
*
* 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 "libavutil/intfloat.h"
#include "avformat.h"
#include "internal.h"
#include "aiff.h"
#include "avio_internal.h"
#include "isom.h"
typedef struct {
int64_t form;
int64_t frames;
int64_t ssnd;
} AIFFOutputContext;
static int aiff_write_header(AVFormatContext *s)
{
AIFFOutputContext *aiff = s->priv_data;
AVIOContext *pb = s->pb;
AVCodecContext *enc = s->streams[0]->codec;
uint64_t sample_rate;
int aifc = 0;
/* First verify if format is ok */
if (!enc->codec_tag)
return -1;
if (enc->codec_tag != MKTAG('N','O','N','E'))
aifc = 1;
/* FORM AIFF header */
ffio_wfourcc(pb, "FORM");
aiff->form = avio_tell(pb);
avio_wb32(pb, 0); /* file length */
ffio_wfourcc(pb, aifc ? "AIFC" : "AIFF");
if (aifc) { // compressed audio
enc->bits_per_coded_sample = 16;
if (!enc->block_align) {
av_log(s, AV_LOG_ERROR, "block align not set\n");
return -1;
}
/* Version chunk */
ffio_wfourcc(pb, "FVER");
avio_wb32(pb, 4);
avio_wb32(pb, 0xA2805140);
}
if (enc->channels > 2 && enc->channel_layout) {
ffio_wfourcc(pb, "CHAN");
avio_wb32(pb, 12);
ff_mov_write_chan(pb, enc->channel_layout);
}
/* Common chunk */
ffio_wfourcc(pb, "COMM");
avio_wb32(pb, aifc ? 24 : 18); /* size */
avio_wb16(pb, enc->channels); /* Number of channels */
aiff->frames = avio_tell(pb);
avio_wb32(pb, 0); /* Number of frames */
if (!enc->bits_per_coded_sample)
enc->bits_per_coded_sample = av_get_bits_per_sample(enc->codec_id);
if (!enc->bits_per_coded_sample) {
av_log(s, AV_LOG_ERROR, "could not compute bits per sample\n");
return -1;
}
if (!enc->block_align)
enc->block_align = (enc->bits_per_coded_sample * enc->channels) >> 3;
avio_wb16(pb, enc->bits_per_coded_sample); /* Sample size */
sample_rate = av_double2int(enc->sample_rate);
avio_wb16(pb, (sample_rate >> 52) + (16383 - 1023));
avio_wb64(pb, UINT64_C(1) << 63 | sample_rate << 11);
if (aifc) {
avio_wl32(pb, enc->codec_tag);
avio_wb16(pb, 0);
}
/* Sound data chunk */
ffio_wfourcc(pb, "SSND");
aiff->ssnd = avio_tell(pb); /* Sound chunk size */
avio_wb32(pb, 0); /* Sound samples data size */
avio_wb32(pb, 0); /* Data offset */
avio_wb32(pb, 0); /* Block-size (block align) */
avpriv_set_pts_info(s->streams[0], 64, 1, s->streams[0]->codec->sample_rate);
/* Data is starting here */
avio_flush(pb);
return 0;
}
static int aiff_write_packet(AVFormatContext *s, AVPacket *pkt)
{
AVIOContext *pb = s->pb;
avio_write(pb, pkt->data, pkt->size);
return 0;
}
static int aiff_write_trailer(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
AIFFOutputContext *aiff = s->priv_data;
AVCodecContext *enc = s->streams[0]->codec;
/* Chunks sizes must be even */
int64_t file_size, end_size;
end_size = file_size = avio_tell(pb);
if (file_size & 1) {
avio_w8(pb, 0);
end_size++;
}
if (s->pb->seekable) {
/* File length */
avio_seek(pb, aiff->form, SEEK_SET);
avio_wb32(pb, file_size - aiff->form - 4);
/* Number of sample frames */
avio_seek(pb, aiff->frames, SEEK_SET);
avio_wb32(pb, (file_size-aiff->ssnd-12)/enc->block_align);
/* Sound Data chunk size */
avio_seek(pb, aiff->ssnd, SEEK_SET);
avio_wb32(pb, file_size - aiff->ssnd - 4);
/* return to the end */
avio_seek(pb, end_size, SEEK_SET);
avio_flush(pb);
}
return 0;
}
AVOutputFormat ff_aiff_muxer = {
.name = "aiff",
.long_name = NULL_IF_CONFIG_SMALL("Audio IFF"),
.mime_type = "audio/aiff",
.extensions = "aif,aiff,afc,aifc",
.priv_data_size = sizeof(AIFFOutputContext),
.audio_codec = CODEC_ID_PCM_S16BE,
.video_codec = CODEC_ID_NONE,
.write_header = aiff_write_header,
.write_packet = aiff_write_packet,
.write_trailer = aiff_write_trailer,
.codec_tag= (const AVCodecTag* const []){ff_codec_aiff_tags, 0},
};