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
28
36
38 switch (codec_id) {
41 return 1; //< kCAFLinearPCMFormatFlagIsFloat
45 return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian
48 return 3; //< kCAFLinearPCMFormatFlagIsFloat | kCAFLinearPCMFormatFlagIsLittleEndian
49 default:
50 return 0;
51 }
52 }
53
55 switch (codec_id) {
69 return 1;
72 return 6;
74 return 64;
79 return 160;
81 return 320;
83 return 384;
86 return 1152;
88 return 1536;
90 return 2048 * channels;
92 return 4096;
94 return (block_align - 4 * channels) * 8 / (4 * channels) + 1;
96 return (block_align - 7 * channels) * 2 / channels + 2;
97 default:
98 return 0;
99 }
100 }
101
103 {
109 int64_t chunk_size = 0;
111
115 }
116
121 }
122
135 codec_tag =
MKTAG(
'l',
'p',
'c',
'm');
136 }
137
138 if (!codec_tag) {
141 }
142
144 av_log(s,
AV_LOG_ERROR,
"Muxing variable packet size not supported on non seekable output\n");
146 }
147
150
154
161 avio_wb32(pb, frame_size);
//< mFramesPerPacket
164
169 }
170
182 avio_w8(pb, 0);
/* decoder version */
183
184 avio_wb16(pb, 0x81FF);
/* Mode set (all modes for AMR_NB) */
185 avio_w8(pb, 0x00);
/* Mode change period (no restriction) */
186 avio_w8(pb, 0x01);
/* Frames per sample */
191 }
192
196 chunk_size += strlen(t->
key) + strlen(t->
value) + 2;
197 }
204 }
205 }
206
211
213 return 0;
214 }
215
217 {
219
224 if (alloc_size < 0) {
226 } else {
229 alloc_size);
230 }
234 }
235 for (i = 4; i > 0; i--) {
236 unsigned top = pkt->
size >> i * 7;
237 if (top)
239 }
242 }
243 return 0;
244 }
245
247 {
251
254
267 }
269 }
271 return 0;
272 }
273
277 .mime_type = "audio/x-caf",
278 .extensions = "caf",
286 };
void avio_wb64(AVIOContext *s, uint64_t val)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int av_dict_count(const AVDictionary *m)
Get number of entries in dictionary.
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
void avio_wl32(AVIOContext *s, unsigned int val)
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
AVStream ** streams
A list of all streams in the file.
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
AVCodecID
Identify the syntax and semantics of the bitstream.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVDictionary * metadata
Metadata that applies to the whole file.
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
Reallocate the given block if it is not large enough, otherwise do nothing.
static int caf_write_header(AVFormatContext *s)
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
preferred ID for decoding MPEG audio layer 1, 2 or 3
uint64_t channel_layout
Audio channel layout.
AVCodecContext * codec
Codec context associated with this stream.
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
AVOutputFormat ff_caf_muxer
static int write_trailer(AVFormatContext *s1)
static uint32_t samples_per_packet(enum AVCodecID codec_id, int channels, int block_align)
static uint32_t codec_flags(enum AVCodecID codec_id)
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
int frame_size
Number of samples per channel in an audio frame.
int sample_rate
samples per second
AVIOContext * pb
I/O context.
void avio_w8(AVIOContext *s, int b)
main external API structure.
static int caf_write_packet(AVFormatContext *s, AVPacket *pkt)
void avio_wb16(AVIOContext *s, unsigned int val)
static int caf_write_trailer(AVFormatContext *s)
void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout)
as in Berlin toast format
int channels
number of audio channels
void * priv_data
Format private data.
static void write_header(FFV1Context *f)
void avio_wb32(AVIOContext *s, unsigned int val)
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
const AVCodecTag ff_codec_caf_tags[]
Known codec tags for CAF.
#define MKTAG(a, b, c, d)
This structure stores compressed data.
static int write_packet(AVFormatContext *s1, AVPacket *pkt)