FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/cafenc.c
Date: 2022-12-05 20:26:17
Exec Total Coverage
Lines: 127 166 76.5%
Functions: 5 5 100.0%
Branches: 42 70 60.0%

Line Branch Exec Source
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 "mux.h"
27 #include "libavutil/intfloat.h"
28 #include "libavutil/dict.h"
29
30 #define FRAME_SIZE_OFFSET 40
31
32 typedef struct {
33 int64_t data;
34 int size_buffer_size;
35 int size_entries_used;
36 int packets;
37 } CAFContext;
38
39 7 static uint32_t codec_flags(enum AVCodecID codec_id) {
40
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7 switch (codec_id) {
41 case AV_CODEC_ID_PCM_F32BE:
42 case AV_CODEC_ID_PCM_F64BE:
43 return 1; //< kCAFLinearPCMFormatFlagIsFloat
44 1 case AV_CODEC_ID_PCM_S16LE:
45 case AV_CODEC_ID_PCM_S24LE:
46 case AV_CODEC_ID_PCM_S32LE:
47 1 return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian
48 case AV_CODEC_ID_PCM_F32LE:
49 case AV_CODEC_ID_PCM_F64LE:
50 return 3; //< kCAFLinearPCMFormatFlagIsFloat | kCAFLinearPCMFormatFlagIsLittleEndian
51 6 default:
52 6 return 0;
53 }
54 }
55
56 9 static uint32_t samples_per_packet(const AVCodecParameters *par) {
57 9 enum AVCodecID codec_id = par->codec_id;
58 9 int channels = par->ch_layout.nb_channels, block_align = par->block_align;
59 9 int frame_size = par->frame_size, sample_rate = par->sample_rate;
60
61
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9 switch (codec_id) {
62 3 case AV_CODEC_ID_PCM_S8:
63 case AV_CODEC_ID_PCM_S16LE:
64 case AV_CODEC_ID_PCM_S16BE:
65 case AV_CODEC_ID_PCM_S24LE:
66 case AV_CODEC_ID_PCM_S24BE:
67 case AV_CODEC_ID_PCM_S32LE:
68 case AV_CODEC_ID_PCM_S32BE:
69 case AV_CODEC_ID_PCM_F32LE:
70 case AV_CODEC_ID_PCM_F32BE:
71 case AV_CODEC_ID_PCM_F64LE:
72 case AV_CODEC_ID_PCM_F64BE:
73 case AV_CODEC_ID_PCM_ALAW:
74 case AV_CODEC_ID_PCM_MULAW:
75 3 return 1;
76 1 case AV_CODEC_ID_MACE3:
77 case AV_CODEC_ID_MACE6:
78 1 return 6;
79 case AV_CODEC_ID_ADPCM_IMA_QT:
80 return 64;
81 2 case AV_CODEC_ID_AMR_NB:
82 case AV_CODEC_ID_GSM:
83 case AV_CODEC_ID_ILBC:
84 case AV_CODEC_ID_QCELP:
85 2 return 160;
86 case AV_CODEC_ID_GSM_MS:
87 return 320;
88 case AV_CODEC_ID_MP1:
89 return 384;
90 case AV_CODEC_ID_OPUS:
91 return frame_size * 48000 / sample_rate;
92 case AV_CODEC_ID_MP2:
93 case AV_CODEC_ID_MP3:
94 return 1152;
95 case AV_CODEC_ID_AC3:
96 return 1536;
97 1 case AV_CODEC_ID_QDM2:
98 case AV_CODEC_ID_QDMC:
99 1 return 2048 * channels;
100 2 case AV_CODEC_ID_ALAC:
101 2 return 4096;
102 case AV_CODEC_ID_ADPCM_IMA_WAV:
103 return (block_align - 4 * channels) * 8 / (4 * channels) + 1;
104 case AV_CODEC_ID_ADPCM_MS:
105 return (block_align - 7 * channels) * 2 / channels + 2;
106 default:
107 return 0;
108 }
109 }
110
111 7 static int caf_write_header(AVFormatContext *s)
112 {
113 7 AVIOContext *pb = s->pb;
114 7 AVCodecParameters *par = s->streams[0]->codecpar;
115 7 CAFContext *caf = s->priv_data;
116 7 const AVDictionaryEntry *t = NULL;
117 7 unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, par->codec_id);
118 7 int64_t chunk_size = 0;
119 7 int frame_size = par->frame_size, sample_rate = par->sample_rate;
120
121
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7 if (s->nb_streams != 1) {
122 av_log(s, AV_LOG_ERROR, "CAF files have exactly one stream\n");
123 return AVERROR(EINVAL);
124 }
125
126
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7 switch (par->codec_id) {
127 case AV_CODEC_ID_AAC:
128 av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n");
129 return AVERROR_PATCHWELCOME;
130 }
131
132
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7 if (par->codec_id == AV_CODEC_ID_OPUS && par->ch_layout.nb_channels > 2) {
133 av_log(s, AV_LOG_ERROR, "Only mono and stereo are supported for Opus\n");
134 return AVERROR_INVALIDDATA;
135 }
136
137
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7 if (!codec_tag) {
138 av_log(s, AV_LOG_ERROR, "unsupported codec\n");
139 return AVERROR_INVALIDDATA;
140 }
141
142
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7 if (!par->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
143 av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n");
144 return AVERROR_INVALIDDATA;
145 }
146
147
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7 if (par->codec_id != AV_CODEC_ID_MP3 || frame_size != 576)
148 7 frame_size = samples_per_packet(par);
149
150
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7 if (par->codec_id == AV_CODEC_ID_OPUS)
151 sample_rate = 48000;
152
153 7 ffio_wfourcc(pb, "caff"); //< mFileType
154 7 avio_wb16(pb, 1); //< mFileVersion
155 7 avio_wb16(pb, 0); //< mFileFlags
156
157 7 ffio_wfourcc(pb, "desc"); //< Audio Description chunk
158 7 avio_wb64(pb, 32); //< mChunkSize
159 7 avio_wb64(pb, av_double2int(sample_rate)); //< mSampleRate
160 7 avio_wl32(pb, codec_tag); //< mFormatID
161 7 avio_wb32(pb, codec_flags(par->codec_id)); //< mFormatFlags
162 7 avio_wb32(pb, par->block_align); //< mBytesPerPacket
163 7 avio_wb32(pb, frame_size); //< mFramesPerPacket
164 7 avio_wb32(pb, par->ch_layout.nb_channels); //< mChannelsPerFrame
165 7 avio_wb32(pb, av_get_bits_per_sample(par->codec_id)); //< mBitsPerChannel
166
167
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7 if (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) {
168 7 ffio_wfourcc(pb, "chan");
169 7 avio_wb64(pb, 12);
170 7 ff_mov_write_chan(pb, par->ch_layout.u.mask);
171 }
172
173
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7 if (par->codec_id == AV_CODEC_ID_ALAC) {
174 1 ffio_wfourcc(pb, "kuki");
175 1 avio_wb64(pb, 12 + par->extradata_size);
176 1 avio_write(pb, "\0\0\0\14frmaalac", 12);
177 1 avio_write(pb, par->extradata, par->extradata_size);
178
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6 } else if (par->codec_id == AV_CODEC_ID_AMR_NB) {
179 1 ffio_wfourcc(pb, "kuki");
180 1 avio_wb64(pb, 29);
181 1 avio_write(pb, "\0\0\0\14frmasamr", 12);
182 1 avio_wb32(pb, 0x11); /* size */
183 1 avio_write(pb, "samrFFMP", 8);
184 1 avio_w8(pb, 0); /* decoder version */
185
186 1 avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
187 1 avio_w8(pb, 0x00); /* Mode change period (no restriction) */
188 1 avio_w8(pb, 0x01); /* Frames per sample */
189
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5 } else if (par->codec_id == AV_CODEC_ID_QDM2 || par->codec_id == AV_CODEC_ID_QDMC) {
190 1 ffio_wfourcc(pb, "kuki");
191 1 avio_wb64(pb, par->extradata_size);
192 1 avio_write(pb, par->extradata, par->extradata_size);
193 }
194
195 7 ff_standardize_creation_time(s);
196
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7 if (av_dict_count(s->metadata)) {
197 2 ffio_wfourcc(pb, "info"); //< Information chunk
198
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16 while ((t = av_dict_iterate(s->metadata, t))) {
199 14 chunk_size += strlen(t->key) + strlen(t->value) + 2;
200 }
201 2 avio_wb64(pb, chunk_size + 4);
202 2 avio_wb32(pb, av_dict_count(s->metadata));
203 2 t = NULL;
204
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16 while ((t = av_dict_iterate(s->metadata, t))) {
205 14 avio_put_str(pb, t->key);
206 14 avio_put_str(pb, t->value);
207 }
208 }
209
210 7 ffio_wfourcc(pb, "data"); //< Audio Data chunk
211 7 caf->data = avio_tell(pb);
212 7 avio_wb64(pb, -1); //< mChunkSize
213 7 avio_wb32(pb, 0); //< mEditCount
214
215 7 return 0;
216 }
217
218 6295 static int caf_write_packet(AVFormatContext *s, AVPacket *pkt)
219 {
220 6295 CAFContext *caf = s->priv_data;
221 6295 AVStream *const st = s->streams[0];
222
223
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6295 if (!st->codecpar->block_align) {
224 uint8_t *pkt_sizes;
225 412 int i, alloc_size = caf->size_entries_used + 5U;
226
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412 if (alloc_size < 0)
227 return AVERROR(ERANGE);
228
229 412 pkt_sizes = av_fast_realloc(st->priv_data,
230 412 &caf->size_buffer_size,
231 alloc_size);
232
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412 if (!pkt_sizes)
233 return AVERROR(ENOMEM);
234 412 st->priv_data = pkt_sizes;
235
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2060 for (i = 4; i > 0; i--) {
236 1648 unsigned top = pkt->size >> i * 7;
237
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1648 if (top)
238 127 pkt_sizes[caf->size_entries_used++] = 128 | top;
239 }
240 412 pkt_sizes[caf->size_entries_used++] = pkt->size & 127;
241 412 caf->packets++;
242 }
243 6295 avio_write(s->pb, pkt->data, pkt->size);
244 6295 return 0;
245 }
246
247 7 static int caf_write_trailer(AVFormatContext *s)
248 {
249 7 CAFContext *caf = s->priv_data;
250 7 AVIOContext *pb = s->pb;
251 7 AVStream *st = s->streams[0];
252 7 AVCodecParameters *par = st->codecpar;
253
254
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7 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
255 7 int64_t file_size = avio_tell(pb);
256
257 7 avio_seek(pb, caf->data, SEEK_SET);
258 7 avio_wb64(pb, file_size - caf->data - 8);
259
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7 if (!par->block_align) {
260 2 int packet_size = samples_per_packet(par);
261
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2 if (!packet_size) {
262 packet_size = st->duration / (caf->packets - 1);
263 avio_seek(pb, FRAME_SIZE_OFFSET, SEEK_SET);
264 avio_wb32(pb, packet_size);
265 }
266 2 avio_seek(pb, file_size, SEEK_SET);
267 2 ffio_wfourcc(pb, "pakt");
268 2 avio_wb64(pb, caf->size_entries_used + 24U);
269 2 avio_wb64(pb, caf->packets); ///< mNumberPackets
270 2 avio_wb64(pb, caf->packets * packet_size); ///< mNumberValidFrames
271 2 avio_wb32(pb, 0); ///< mPrimingFrames
272 2 avio_wb32(pb, 0); ///< mRemainderFrames
273 2 avio_write(pb, st->priv_data, caf->size_entries_used);
274 }
275 }
276 7 return 0;
277 }
278
279 const AVOutputFormat ff_caf_muxer = {
280 .name = "caf",
281 .long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
282 .mime_type = "audio/x-caf",
283 .extensions = "caf",
284 .priv_data_size = sizeof(CAFContext),
285 .audio_codec = AV_CODEC_ID_PCM_S16BE,
286 .video_codec = AV_CODEC_ID_NONE,
287 .write_header = caf_write_header,
288 .write_packet = caf_write_packet,
289 .write_trailer = caf_write_trailer,
290 .codec_tag = ff_caf_codec_tags_list,
291 };
292