FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/cafenc.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 126 163 77.3%
Functions: 5 5 100.0%
Branches: 41 68 60.3%
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 #include "libavutil/mem.h"
30
31 #define FRAME_SIZE_OFFSET 40
32
33 typedef struct {
34 int64_t data;
35 int size_buffer_size;
36 int size_entries_used;
37 int packets;
38 } CAFContext;
39
40 7 static uint32_t codec_flags(enum AVCodecID codec_id) {
41
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 7 switch (codec_id) {
42 ✗ case AV_CODEC_ID_PCM_F32BE:
43 case AV_CODEC_ID_PCM_F64BE:
44 ✗ return 1; //< kCAFLinearPCMFormatFlagIsFloat
45 1 case AV_CODEC_ID_PCM_S16LE:
46 case AV_CODEC_ID_PCM_S24LE:
47 case AV_CODEC_ID_PCM_S32LE:
48 1 return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian
49 ✗ case AV_CODEC_ID_PCM_F32LE:
50 case AV_CODEC_ID_PCM_F64LE:
51 ✗ return 3; //< kCAFLinearPCMFormatFlagIsFloat | kCAFLinearPCMFormatFlagIsLittleEndian
52 6 default:
53 6 return 0;
54 }
55 }
56
57 9 static uint32_t samples_per_packet(const AVCodecParameters *par) {
58 9 enum AVCodecID codec_id = par->codec_id;
59 9 int channels = par->ch_layout.nb_channels, block_align = par->block_align;
60 9 int frame_size = par->frame_size, sample_rate = par->sample_rate;
61
62
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 9 switch (codec_id) {
63 3 case AV_CODEC_ID_PCM_S8:
64 case AV_CODEC_ID_PCM_S16LE:
65 case AV_CODEC_ID_PCM_S16BE:
66 case AV_CODEC_ID_PCM_S24LE:
67 case AV_CODEC_ID_PCM_S24BE:
68 case AV_CODEC_ID_PCM_S32LE:
69 case AV_CODEC_ID_PCM_S32BE:
70 case AV_CODEC_ID_PCM_F32LE:
71 case AV_CODEC_ID_PCM_F32BE:
72 case AV_CODEC_ID_PCM_F64LE:
73 case AV_CODEC_ID_PCM_F64BE:
74 case AV_CODEC_ID_PCM_ALAW:
75 case AV_CODEC_ID_PCM_MULAW:
76 3 return 1;
77 1 case AV_CODEC_ID_MACE3:
78 case AV_CODEC_ID_MACE6:
79 1 return 6;
80 ✗ case AV_CODEC_ID_ADPCM_IMA_QT:
81 ✗ return 64;
82 2 case AV_CODEC_ID_AMR_NB:
83 case AV_CODEC_ID_GSM:
84 case AV_CODEC_ID_ILBC:
85 case AV_CODEC_ID_QCELP:
86 2 return 160;
87 ✗ case AV_CODEC_ID_GSM_MS:
88 ✗ return 320;
89 ✗ case AV_CODEC_ID_MP1:
90 ✗ return 384;
91 ✗ case AV_CODEC_ID_OPUS:
92 ✗ return frame_size * 48000 / sample_rate;
93 ✗ case AV_CODEC_ID_MP2:
94 case AV_CODEC_ID_MP3:
95 ✗ return 1152;
96 ✗ case AV_CODEC_ID_AC3:
97 ✗ return 1536;
98 1 case AV_CODEC_ID_QDM2:
99 case AV_CODEC_ID_QDMC:
100 1 return 2048 * channels;
101 2 case AV_CODEC_ID_ALAC:
102 2 return 4096;
103 ✗ case AV_CODEC_ID_ADPCM_IMA_WAV:
104 ✗ return (block_align - 4 * channels) * 8 / (4 * channels) + 1;
105 ✗ case AV_CODEC_ID_ADPCM_MS:
106 ✗ return (block_align - 7 * channels) * 2 / channels + 2;
107 ✗ default:
108 ✗ return 0;
109 }
110 }
111
112 7 static int caf_write_header(AVFormatContext *s)
113 {
114 7 AVIOContext *pb = s->pb;
115 7 AVCodecParameters *par = s->streams[0]->codecpar;
116 7 CAFContext *caf = s->priv_data;
117 7 const AVDictionaryEntry *t = NULL;
118 7 unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, par->codec_id);
119 7 int64_t chunk_size = 0;
120 7 int frame_size = par->frame_size, sample_rate = par->sample_rate;
121
122
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 7 switch (par->codec_id) {
123 ✗ case AV_CODEC_ID_AAC:
124 ✗ av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n");
125 ✗ return AVERROR_PATCHWELCOME;
126 }
127
128
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 7 if (par->codec_id == AV_CODEC_ID_OPUS && par->ch_layout.nb_channels > 2) {
129 ✗ av_log(s, AV_LOG_ERROR, "Only mono and stereo are supported for Opus\n");
130 ✗ return AVERROR_INVALIDDATA;
131 }
132
133
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 7 if (!codec_tag) {
134 ✗ av_log(s, AV_LOG_ERROR, "unsupported codec\n");
135 ✗ return AVERROR_INVALIDDATA;
136 }
137
138
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 7 if (!par->block_align && !(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
139 ✗ av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n");
140 ✗ return AVERROR_INVALIDDATA;
141 }
142
143
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 7 if (par->codec_id != AV_CODEC_ID_MP3 || frame_size != 576)
144 7 frame_size = samples_per_packet(par);
145
146
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 7 if (par->codec_id == AV_CODEC_ID_OPUS)
147 ✗ sample_rate = 48000;
148
149 7 ffio_wfourcc(pb, "caff"); //< mFileType
150 7 avio_wb16(pb, 1); //< mFileVersion
151 7 avio_wb16(pb, 0); //< mFileFlags
152
153 7 ffio_wfourcc(pb, "desc"); //< Audio Description chunk
154 7 avio_wb64(pb, 32); //< mChunkSize
155 7 avio_wb64(pb, av_double2int(sample_rate)); //< mSampleRate
156 7 avio_wl32(pb, codec_tag); //< mFormatID
157 7 avio_wb32(pb, codec_flags(par->codec_id)); //< mFormatFlags
158 7 avio_wb32(pb, par->block_align); //< mBytesPerPacket
159 7 avio_wb32(pb, frame_size); //< mFramesPerPacket
160 7 avio_wb32(pb, par->ch_layout.nb_channels); //< mChannelsPerFrame
161 7 avio_wb32(pb, av_get_bits_per_sample(par->codec_id)); //< mBitsPerChannel
162
163
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 7 if (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE) {
164 7 ffio_wfourcc(pb, "chan");
165 7 avio_wb64(pb, 12);
166 7 ff_mov_write_chan(pb, par->ch_layout.u.mask);
167 }
168
169
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 7 if (par->codec_id == AV_CODEC_ID_ALAC) {
170 1 ffio_wfourcc(pb, "kuki");
171 1 avio_wb64(pb, 12 + par->extradata_size);
172 1 avio_write(pb, "\0\0\0\14frmaalac", 12);
173 1 avio_write(pb, par->extradata, par->extradata_size);
174
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 6 } else if (par->codec_id == AV_CODEC_ID_AMR_NB) {
175 1 ffio_wfourcc(pb, "kuki");
176 1 avio_wb64(pb, 29);
177 1 avio_write(pb, "\0\0\0\14frmasamr", 12);
178 1 avio_wb32(pb, 0x11); /* size */
179 1 avio_write(pb, "samrFFMP", 8);
180 1 avio_w8(pb, 0); /* decoder version */
181
182 1 avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
183 1 avio_w8(pb, 0x00); /* Mode change period (no restriction) */
184 1 avio_w8(pb, 0x01); /* Frames per sample */
185
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 5 } else if (par->codec_id == AV_CODEC_ID_QDM2 || par->codec_id == AV_CODEC_ID_QDMC) {
186 1 ffio_wfourcc(pb, "kuki");
187 1 avio_wb64(pb, par->extradata_size);
188 1 avio_write(pb, par->extradata, par->extradata_size);
189 }
190
191 7 ff_standardize_creation_time(s);
192
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 7 if (av_dict_count(s->metadata)) {
193 2 ffio_wfourcc(pb, "info"); //< Information chunk
194
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 16 while ((t = av_dict_iterate(s->metadata, t))) {
195 14 chunk_size += strlen(t->key) + strlen(t->value) + 2;
196 }
197 2 avio_wb64(pb, chunk_size + 4);
198 2 avio_wb32(pb, av_dict_count(s->metadata));
199 2 t = NULL;
200
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 16 while ((t = av_dict_iterate(s->metadata, t))) {
201 14 avio_put_str(pb, t->key);
202 14 avio_put_str(pb, t->value);
203 }
204 }
205
206 7 ffio_wfourcc(pb, "data"); //< Audio Data chunk
207 7 caf->data = avio_tell(pb);
208 7 avio_wb64(pb, -1); //< mChunkSize
209 7 avio_wb32(pb, 0); //< mEditCount
210
211 7 return 0;
212 }
213
214 866 static int caf_write_packet(AVFormatContext *s, AVPacket *pkt)
215 {
216 866 CAFContext *caf = s->priv_data;
217 866 AVStream *const st = s->streams[0];
218
219
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 866 if (!st->codecpar->block_align) {
220 uint8_t *pkt_sizes;
221 412 int i, alloc_size = caf->size_entries_used + 5U;
222
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 412 if (alloc_size < 0)
223 ✗ return AVERROR(ERANGE);
224
225 412 pkt_sizes = av_fast_realloc(st->priv_data,
226 412 &caf->size_buffer_size,
227 alloc_size);
228
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 412 if (!pkt_sizes)
229 ✗ return AVERROR(ENOMEM);
230 412 st->priv_data = pkt_sizes;
231
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 2060 for (i = 4; i > 0; i--) {
232 1648 unsigned top = pkt->size >> i * 7;
233
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 1648 if (top)
234 127 pkt_sizes[caf->size_entries_used++] = 128 | top;
235 }
236 412 pkt_sizes[caf->size_entries_used++] = pkt->size & 127;
237 412 caf->packets++;
238 }
239 866 avio_write(s->pb, pkt->data, pkt->size);
240 866 return 0;
241 }
242
243 7 static int caf_write_trailer(AVFormatContext *s)
244 {
245 7 CAFContext *caf = s->priv_data;
246 7 AVIOContext *pb = s->pb;
247 7 AVStream *st = s->streams[0];
248 7 AVCodecParameters *par = st->codecpar;
249
250
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 7 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
251 7 int64_t file_size = avio_tell(pb);
252
253 7 avio_seek(pb, caf->data, SEEK_SET);
254 7 avio_wb64(pb, file_size - caf->data - 8);
255
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 7 if (!par->block_align) {
256 2 int packet_size = samples_per_packet(par);
257
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 2 if (!packet_size) {
258 ✗ packet_size = st->duration / (caf->packets - 1);
259 ✗ avio_seek(pb, FRAME_SIZE_OFFSET, SEEK_SET);
260 ✗ avio_wb32(pb, packet_size);
261 }
262 2 avio_seek(pb, file_size, SEEK_SET);
263 2 ffio_wfourcc(pb, "pakt");
264 2 avio_wb64(pb, caf->size_entries_used + 24U);
265 2 avio_wb64(pb, caf->packets); ///< mNumberPackets
266 2 avio_wb64(pb, caf->packets * packet_size); ///< mNumberValidFrames
267 2 avio_wb32(pb, 0); ///< mPrimingFrames
268 2 avio_wb32(pb, 0); ///< mRemainderFrames
269 2 avio_write(pb, st->priv_data, caf->size_entries_used);
270 }
271 }
272 7 return 0;
273 }
274
275 const FFOutputFormat ff_caf_muxer = {
276 .p.name = "caf",
277 .p.long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
278 .p.mime_type = "audio/x-caf",
279 .p.extensions = "caf",
280 .priv_data_size = sizeof(CAFContext),
281 .p.audio_codec = AV_CODEC_ID_PCM_S16BE,
282 .p.video_codec = AV_CODEC_ID_NONE,
283 .p.subtitle_codec = AV_CODEC_ID_NONE,
284 .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
285 .write_header = caf_write_header,
286 .write_packet = caf_write_packet,
287 .write_trailer = caf_write_trailer,
288 .p.codec_tag = ff_caf_codec_tags_list,
289 };
290