LCOV - code coverage report
Current view: top level - libavformat - cafenc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 77 159 48.4 %
Date: 2017-12-15 11:05:35 Functions: 5 5 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Core Audio Format muxer
       3             :  * Copyright (c) 2011 Carl Eugen Hoyos
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "avformat.h"
      23             : #include "caf.h"
      24             : #include "isom.h"
      25             : #include "avio_internal.h"
      26             : #include "libavutil/intfloat.h"
      27             : #include "libavutil/dict.h"
      28             : 
      29             : typedef struct {
      30             :     int64_t data;
      31             :     uint8_t *pkt_sizes;
      32             :     int size_buffer_size;
      33             :     int size_entries_used;
      34             :     int packets;
      35             : } CAFContext;
      36             : 
      37           1 : static uint32_t codec_flags(enum AVCodecID codec_id) {
      38           1 :     switch (codec_id) {
      39           0 :     case AV_CODEC_ID_PCM_F32BE:
      40             :     case AV_CODEC_ID_PCM_F64BE:
      41           0 :         return 1; //< kCAFLinearPCMFormatFlagIsFloat
      42           0 :     case AV_CODEC_ID_PCM_S16LE:
      43             :     case AV_CODEC_ID_PCM_S24LE:
      44             :     case AV_CODEC_ID_PCM_S32LE:
      45           0 :         return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian
      46           0 :     case AV_CODEC_ID_PCM_F32LE:
      47             :     case AV_CODEC_ID_PCM_F64LE:
      48           0 :         return 3; //< kCAFLinearPCMFormatFlagIsFloat | kCAFLinearPCMFormatFlagIsLittleEndian
      49           1 :     default:
      50           1 :         return 0;
      51             :     }
      52             : }
      53             : 
      54           1 : static uint32_t samples_per_packet(enum AVCodecID codec_id, int channels, int block_align) {
      55           1 :     switch (codec_id) {
      56           1 :     case AV_CODEC_ID_PCM_S8:
      57             :     case AV_CODEC_ID_PCM_S16LE:
      58             :     case AV_CODEC_ID_PCM_S16BE:
      59             :     case AV_CODEC_ID_PCM_S24LE:
      60             :     case AV_CODEC_ID_PCM_S24BE:
      61             :     case AV_CODEC_ID_PCM_S32LE:
      62             :     case AV_CODEC_ID_PCM_S32BE:
      63             :     case AV_CODEC_ID_PCM_F32LE:
      64             :     case AV_CODEC_ID_PCM_F32BE:
      65             :     case AV_CODEC_ID_PCM_F64LE:
      66             :     case AV_CODEC_ID_PCM_F64BE:
      67             :     case AV_CODEC_ID_PCM_ALAW:
      68             :     case AV_CODEC_ID_PCM_MULAW:
      69           1 :         return 1;
      70           0 :     case AV_CODEC_ID_MACE3:
      71             :     case AV_CODEC_ID_MACE6:
      72           0 :         return 6;
      73           0 :     case AV_CODEC_ID_ADPCM_IMA_QT:
      74           0 :         return 64;
      75           0 :     case AV_CODEC_ID_AMR_NB:
      76             :     case AV_CODEC_ID_GSM:
      77             :     case AV_CODEC_ID_ILBC:
      78             :     case AV_CODEC_ID_QCELP:
      79           0 :         return 160;
      80           0 :     case AV_CODEC_ID_GSM_MS:
      81           0 :         return 320;
      82           0 :     case AV_CODEC_ID_MP1:
      83           0 :         return 384;
      84           0 :     case AV_CODEC_ID_OPUS:
      85           0 :         return 960;
      86           0 :     case AV_CODEC_ID_MP2:
      87             :     case AV_CODEC_ID_MP3:
      88           0 :         return 1152;
      89           0 :     case AV_CODEC_ID_AC3:
      90           0 :         return 1536;
      91           0 :     case AV_CODEC_ID_QDM2:
      92             :     case AV_CODEC_ID_QDMC:
      93           0 :         return 2048 * channels;
      94           0 :     case AV_CODEC_ID_ALAC:
      95           0 :         return 4096;
      96           0 :     case AV_CODEC_ID_ADPCM_IMA_WAV:
      97           0 :         return (block_align - 4 * channels) * 8 / (4 * channels) + 1;
      98           0 :     case AV_CODEC_ID_ADPCM_MS:
      99           0 :         return (block_align - 7 * channels) * 2 / channels + 2;
     100           0 :     default:
     101           0 :         return 0;
     102             :     }
     103             : }
     104             : 
     105           1 : static int caf_write_header(AVFormatContext *s)
     106             : {
     107           1 :     AVIOContext *pb = s->pb;
     108           1 :     AVCodecParameters *par = s->streams[0]->codecpar;
     109           1 :     CAFContext *caf = s->priv_data;
     110           1 :     AVDictionaryEntry *t = NULL;
     111           1 :     unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, par->codec_id);
     112           1 :     int64_t chunk_size = 0;
     113           1 :     int frame_size = par->frame_size;
     114             : 
     115           1 :     if (s->nb_streams != 1) {
     116           0 :         av_log(s, AV_LOG_ERROR, "CAF files have exactly one stream\n");
     117           0 :         return AVERROR(EINVAL);
     118             :     }
     119             : 
     120           1 :     switch (par->codec_id) {
     121           0 :     case AV_CODEC_ID_AAC:
     122           0 :         av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n");
     123           0 :         return AVERROR_PATCHWELCOME;
     124             :     }
     125             : 
     126           1 :     if (par->codec_id == AV_CODEC_ID_OPUS && par->channels > 2) {
     127           0 :         av_log(s, AV_LOG_ERROR, "Only mono and stereo are supported for Opus\n");
     128           0 :         return AVERROR_INVALIDDATA;
     129             :     }
     130             : 
     131           1 :     if (!codec_tag) {
     132           0 :         av_log(s, AV_LOG_ERROR, "unsupported codec\n");
     133           0 :         return AVERROR_INVALIDDATA;
     134             :     }
     135             : 
     136           1 :     if (!par->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
     137           0 :         av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n");
     138           0 :         return AVERROR_INVALIDDATA;
     139             :     }
     140             : 
     141           1 :     if (par->codec_id != AV_CODEC_ID_MP3 || frame_size != 576)
     142           1 :         frame_size = samples_per_packet(par->codec_id, par->channels, par->block_align);
     143             : 
     144           1 :     ffio_wfourcc(pb, "caff"); //< mFileType
     145           1 :     avio_wb16(pb, 1);         //< mFileVersion
     146           1 :     avio_wb16(pb, 0);         //< mFileFlags
     147             : 
     148           1 :     ffio_wfourcc(pb, "desc");                         //< Audio Description chunk
     149           1 :     avio_wb64(pb, 32);                                //< mChunkSize
     150           1 :     avio_wb64(pb, av_double2int(par->sample_rate));   //< mSampleRate
     151           1 :     avio_wl32(pb, codec_tag);                         //< mFormatID
     152           1 :     avio_wb32(pb, codec_flags(par->codec_id));        //< mFormatFlags
     153           1 :     avio_wb32(pb, par->block_align);                  //< mBytesPerPacket
     154           1 :     avio_wb32(pb, frame_size);                        //< mFramesPerPacket
     155           1 :     avio_wb32(pb, par->channels);                     //< mChannelsPerFrame
     156           1 :     avio_wb32(pb, av_get_bits_per_sample(par->codec_id)); //< mBitsPerChannel
     157             : 
     158           1 :     if (par->channel_layout) {
     159           1 :         ffio_wfourcc(pb, "chan");
     160           1 :         avio_wb64(pb, 12);
     161           1 :         ff_mov_write_chan(pb, par->channel_layout);
     162             :     }
     163             : 
     164           1 :     if (par->codec_id == AV_CODEC_ID_ALAC) {
     165           0 :         ffio_wfourcc(pb, "kuki");
     166           0 :         avio_wb64(pb, 12 + par->extradata_size);
     167           0 :         avio_write(pb, "\0\0\0\14frmaalac", 12);
     168           0 :         avio_write(pb, par->extradata, par->extradata_size);
     169           1 :     } else if (par->codec_id == AV_CODEC_ID_AMR_NB) {
     170           0 :         ffio_wfourcc(pb, "kuki");
     171           0 :         avio_wb64(pb, 29);
     172           0 :         avio_write(pb, "\0\0\0\14frmasamr", 12);
     173           0 :         avio_wb32(pb, 0x11); /* size */
     174           0 :         avio_write(pb, "samrFFMP", 8);
     175           0 :         avio_w8(pb, 0); /* decoder version */
     176             : 
     177           0 :         avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
     178           0 :         avio_w8(pb, 0x00); /* Mode change period (no restriction) */
     179           0 :         avio_w8(pb, 0x01); /* Frames per sample */
     180           1 :     } else if (par->codec_id == AV_CODEC_ID_QDM2 || par->codec_id == AV_CODEC_ID_QDMC) {
     181           0 :         ffio_wfourcc(pb, "kuki");
     182           0 :         avio_wb64(pb, par->extradata_size);
     183           0 :         avio_write(pb, par->extradata, par->extradata_size);
     184             :     }
     185             : 
     186           1 :     ff_standardize_creation_time(s);
     187           1 :     if (av_dict_count(s->metadata)) {
     188           1 :         ffio_wfourcc(pb, "info"); //< Information chunk
     189           3 :         while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
     190           1 :             chunk_size += strlen(t->key) + strlen(t->value) + 2;
     191             :         }
     192           1 :         avio_wb64(pb, chunk_size + 4);
     193           1 :         avio_wb32(pb, av_dict_count(s->metadata));
     194           1 :         t = NULL;
     195           3 :         while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
     196           1 :             avio_put_str(pb, t->key);
     197           1 :             avio_put_str(pb, t->value);
     198             :         }
     199             :     }
     200             : 
     201           1 :     ffio_wfourcc(pb, "data"); //< Audio Data chunk
     202           1 :     caf->data = avio_tell(pb);
     203           1 :     avio_wb64(pb, -1);        //< mChunkSize
     204           1 :     avio_wb32(pb, 0);         //< mEditCount
     205             : 
     206           1 :     avio_flush(pb);
     207           1 :     return 0;
     208             : }
     209             : 
     210          44 : static int caf_write_packet(AVFormatContext *s, AVPacket *pkt)
     211             : {
     212          44 :     CAFContext *caf = s->priv_data;
     213             : 
     214          44 :     avio_write(s->pb, pkt->data, pkt->size);
     215          44 :     if (!s->streams[0]->codecpar->block_align) {
     216           0 :         void *pkt_sizes = caf->pkt_sizes;
     217           0 :         int i, alloc_size = caf->size_entries_used + 5;
     218           0 :         if (alloc_size < 0) {
     219           0 :             caf->pkt_sizes = NULL;
     220             :         } else {
     221           0 :             caf->pkt_sizes = av_fast_realloc(caf->pkt_sizes,
     222           0 :                                              &caf->size_buffer_size,
     223             :                                              alloc_size);
     224             :         }
     225           0 :         if (!caf->pkt_sizes) {
     226           0 :             av_free(pkt_sizes);
     227           0 :             return AVERROR(ENOMEM);
     228             :         }
     229           0 :         for (i = 4; i > 0; i--) {
     230           0 :             unsigned top = pkt->size >> i * 7;
     231           0 :             if (top)
     232           0 :                 caf->pkt_sizes[caf->size_entries_used++] = 128 | top;
     233             :         }
     234           0 :         caf->pkt_sizes[caf->size_entries_used++] = pkt->size & 127;
     235           0 :         caf->packets++;
     236             :     }
     237          44 :     return 0;
     238             : }
     239             : 
     240           1 : static int caf_write_trailer(AVFormatContext *s)
     241             : {
     242           1 :     CAFContext *caf = s->priv_data;
     243           1 :     AVIOContext *pb = s->pb;
     244           1 :     AVCodecParameters *par = s->streams[0]->codecpar;
     245             : 
     246           1 :     if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
     247           1 :         int64_t file_size = avio_tell(pb);
     248             : 
     249           1 :         avio_seek(pb, caf->data, SEEK_SET);
     250           1 :         avio_wb64(pb, file_size - caf->data - 8);
     251           1 :         avio_seek(pb, file_size, SEEK_SET);
     252           1 :         if (!par->block_align) {
     253           0 :             ffio_wfourcc(pb, "pakt");
     254           0 :             avio_wb64(pb, caf->size_entries_used + 24);
     255           0 :             avio_wb64(pb, caf->packets); ///< mNumberPackets
     256           0 :             avio_wb64(pb, caf->packets * samples_per_packet(par->codec_id, par->channels, par->block_align)); ///< mNumberValidFrames
     257           0 :             avio_wb32(pb, 0); ///< mPrimingFrames
     258           0 :             avio_wb32(pb, 0); ///< mRemainderFrames
     259           0 :             avio_write(pb, caf->pkt_sizes, caf->size_entries_used);
     260           0 :             caf->size_buffer_size = 0;
     261             :         }
     262           1 :         avio_flush(pb);
     263             :     }
     264           1 :     av_freep(&caf->pkt_sizes);
     265           1 :     return 0;
     266             : }
     267             : 
     268             : AVOutputFormat ff_caf_muxer = {
     269             :     .name           = "caf",
     270             :     .long_name      = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
     271             :     .mime_type      = "audio/x-caf",
     272             :     .extensions     = "caf",
     273             :     .priv_data_size = sizeof(CAFContext),
     274             :     .audio_codec    = AV_CODEC_ID_PCM_S16BE,
     275             :     .video_codec    = AV_CODEC_ID_NONE,
     276             :     .write_header   = caf_write_header,
     277             :     .write_packet   = caf_write_packet,
     278             :     .write_trailer  = caf_write_trailer,
     279             :     .codec_tag      = (const AVCodecTag* const []){ff_codec_caf_tags, 0},
     280             : };

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