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/*
* 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);
}
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