mirror of https://git.ffmpeg.org/ffmpeg.git
117 lines
5.2 KiB
C
117 lines
5.2 KiB
C
/*
|
|
* CAF common code
|
|
* Copyright (c) 2007 Justin Ruggles
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* CAF common code
|
|
*/
|
|
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
#include "caf.h"
|
|
|
|
/**
|
|
* Known codec tags for CAF
|
|
*/
|
|
const AVCodecTag ff_codec_caf_tags[] = {
|
|
{ CODEC_ID_AAC, MKBETAG('a','a','c',' ') },
|
|
{ CODEC_ID_AC3, MKBETAG('a','c','-','3') },
|
|
{ CODEC_ID_ALAC, MKBETAG('a','l','a','c') },
|
|
/* FIXME: use DV demuxer, as done in MOV */
|
|
/*{ CODEC_ID_DVAUDIO, MKBETAG('v','d','v','a') },*/
|
|
/*{ CODEC_ID_DVAUDIO, MKBETAG('d','v','c','a') },*/
|
|
{ CODEC_ID_ADPCM_IMA_QT, MKBETAG('i','m','a','4') },
|
|
{ CODEC_ID_MACE3, MKBETAG('M','A','C','3') },
|
|
{ CODEC_ID_MACE6, MKBETAG('M','A','C','6') },
|
|
{ CODEC_ID_MP3, MKBETAG('.','m','p','3') },
|
|
{ CODEC_ID_MP2, MKBETAG('.','m','p','2') },
|
|
{ CODEC_ID_MP1, MKBETAG('.','m','p','1') },
|
|
{ CODEC_ID_PCM_ALAW, MKBETAG('a','l','a','w') },
|
|
{ CODEC_ID_PCM_MULAW, MKBETAG('u','l','a','w') },
|
|
{ CODEC_ID_QCELP, MKBETAG('Q','c','l','p') },
|
|
{ CODEC_ID_QDM2, MKBETAG('Q','D','M','2') },
|
|
{ CODEC_ID_QDM2, MKBETAG('Q','D','M','C') },
|
|
/* currently unsupported codecs */
|
|
/*{ AC-3 over S/PDIF MKBETAG('c','a','c','3') },*/
|
|
/*{ MPEG4CELP MKBETAG('c','e','l','p') },*/
|
|
/*{ MPEG4HVXC MKBETAG('h','v','x','c') },*/
|
|
/*{ MPEG4TwinVQ MKBETAG('t','w','v','q') },*/
|
|
{ CODEC_ID_NONE, 0 },
|
|
};
|
|
|
|
typedef struct CafChannelLayout {
|
|
int64_t channel_layout;
|
|
uint32_t layout_tag;
|
|
} CafChannelLayout;
|
|
|
|
static const CafChannelLayout caf_channel_layout[] = {
|
|
{ AV_CH_LAYOUT_MONO, (100<<16) | 1}, //< kCAFChannelLayoutTag_Mono
|
|
{ AV_CH_LAYOUT_STEREO, (101<<16) | 2}, //< kCAFChannelLayoutTag_Stereo
|
|
{ AV_CH_LAYOUT_STEREO, (102<<16) | 2}, //< kCAFChannelLayoutTag_StereoHeadphones
|
|
{ AV_CH_LAYOUT_2_1, (131<<16) | 3}, //< kCAFChannelLayoutTag_ITU_2_1
|
|
{ AV_CH_LAYOUT_2_2, (132<<16) | 4}, //< kCAFChannelLayoutTag_ITU_2_2
|
|
{ AV_CH_LAYOUT_QUAD, (108<<16) | 4}, //< kCAFChannelLayoutTag_Quadraphonic
|
|
{ AV_CH_LAYOUT_SURROUND, (113<<16) | 3}, //< kCAFChannelLayoutTag_MPEG_3_0_A
|
|
{ AV_CH_LAYOUT_4POINT0, (115<<16) | 4}, //< kCAFChannelLayoutTag_MPEG_4_0_A
|
|
{ AV_CH_LAYOUT_5POINT0_BACK, (117<<16) | 5}, //< kCAFChannelLayoutTag_MPEG_5_0_A
|
|
{ AV_CH_LAYOUT_5POINT0, (117<<16) | 5}, //< kCAFChannelLayoutTag_MPEG_5_0_A
|
|
{ AV_CH_LAYOUT_5POINT1_BACK, (121<<16) | 6}, //< kCAFChannelLayoutTag_MPEG_5_1_A
|
|
{ AV_CH_LAYOUT_5POINT1, (121<<16) | 6}, //< kCAFChannelLayoutTag_MPEG_5_1_A
|
|
{ AV_CH_LAYOUT_7POINT1, (128<<16) | 8}, //< kCAFChannelLayoutTag_MPEG_7_1_C
|
|
{ AV_CH_LAYOUT_7POINT1_WIDE, (126<<16) | 8}, //< kCAFChannelLayoutTag_MPEG_7_1_A
|
|
{ AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY, (133<<16) | 3}, //< kCAFChannelLayoutTag_DVD_4
|
|
{ AV_CH_LAYOUT_2_1|AV_CH_LOW_FREQUENCY, (134<<16) | 4}, //< kCAFChannelLayoutTag_DVD_5
|
|
{ AV_CH_LAYOUT_2_2|AV_CH_LOW_FREQUENCY, (135<<16) | 4}, //< kCAFChannelLayoutTag_DVD_6
|
|
{ AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY, (136<<16) | 4}, //< kCAFChannelLayoutTag_DVD_10
|
|
{ AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY, (137<<16) | 5}, //< kCAFChannelLayoutTag_DVD_11
|
|
{ 0, 0},
|
|
};
|
|
|
|
void ff_read_chan_chunk(AVFormatContext *s, int64_t size, AVCodecContext *codec)
|
|
{
|
|
uint32_t layout_tag;
|
|
AVIOContext *pb = s->pb;
|
|
const CafChannelLayout *caf_layout = caf_channel_layout;
|
|
if (size != 12) {
|
|
// Channel descriptions not implemented
|
|
av_log_ask_for_sample(s, "Unimplemented channel layout.\n");
|
|
avio_skip(pb, size);
|
|
return;
|
|
}
|
|
layout_tag = avio_rb32(pb);
|
|
if (layout_tag == 0x10000) { //< kCAFChannelLayoutTag_UseChannelBitmap
|
|
codec->channel_layout = avio_rb32(pb);
|
|
avio_skip(pb, 4);
|
|
return;
|
|
}
|
|
while (caf_layout->channel_layout) {
|
|
if (layout_tag == caf_layout->layout_tag) {
|
|
codec->channel_layout = caf_layout->channel_layout;
|
|
break;
|
|
}
|
|
caf_layout++;
|
|
}
|
|
if (!codec->channel_layout)
|
|
av_log(s, AV_LOG_WARNING, "Unknown channel layout.\n");
|
|
avio_skip(pb, 8);
|
|
}
|
|
|