[deb_ffmpeg.git] / ffmpeg / libavformat / cafenc.c

/*
 * Core Audio Format muxer
 * Copyright (c) 2011 Carl Eugen Hoyos
 *
 * 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
 */

#include "avformat.h"
#include "caf.h"
#include "isom.h"
#include "avio_internal.h"
#include "libavutil/intfloat.h"
#include "libavutil/dict.h"

typedef struct {
    int64_t data;
    uint8_t *pkt_sizes;
    int size_buffer_size;
    int size_entries_used;
    int packets;
} CAFContext;

static uint32_t codec_flags(enum AVCodecID codec_id) {
    switch (codec_id) {
    case AV_CODEC_ID_PCM_F32BE:
    case AV_CODEC_ID_PCM_F64BE:
        return 1; //< kCAFLinearPCMFormatFlagIsFloat
    case AV_CODEC_ID_PCM_S16LE:
    case AV_CODEC_ID_PCM_S24LE:
    case AV_CODEC_ID_PCM_S32LE:
        return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian
    case AV_CODEC_ID_PCM_F32LE:
    case AV_CODEC_ID_PCM_F64LE:
        return 3; //< kCAFLinearPCMFormatFlagIsFloat | kCAFLinearPCMFormatFlagIsLittleEndian
    default:
        return 0;
    }
}

static uint32_t samples_per_packet(enum AVCodecID codec_id, int channels, int block_align) {
    switch (codec_id) {
    case AV_CODEC_ID_PCM_S8:
    case AV_CODEC_ID_PCM_S16LE:
    case AV_CODEC_ID_PCM_S16BE:
    case AV_CODEC_ID_PCM_S24LE:
    case AV_CODEC_ID_PCM_S24BE:
    case AV_CODEC_ID_PCM_S32LE:
    case AV_CODEC_ID_PCM_S32BE:
    case AV_CODEC_ID_PCM_F32LE:
    case AV_CODEC_ID_PCM_F32BE:
    case AV_CODEC_ID_PCM_F64LE:
    case AV_CODEC_ID_PCM_F64BE:
    case AV_CODEC_ID_PCM_ALAW:
    case AV_CODEC_ID_PCM_MULAW:
        return 1;
    case AV_CODEC_ID_MACE3:
    case AV_CODEC_ID_MACE6:
        return 6;
    case AV_CODEC_ID_ADPCM_IMA_QT:
        return 64;
    case AV_CODEC_ID_AMR_NB:
    case AV_CODEC_ID_GSM:
    case AV_CODEC_ID_ILBC:
    case AV_CODEC_ID_QCELP:
        return 160;
    case AV_CODEC_ID_GSM_MS:
        return 320;
    case AV_CODEC_ID_MP1:
        return 384;
    case AV_CODEC_ID_MP2:
    case AV_CODEC_ID_MP3:
        return 1152;
    case AV_CODEC_ID_AC3:
        return 1536;
    case AV_CODEC_ID_QDM2:
        return 2048 * channels;
    case AV_CODEC_ID_ALAC:
        return 4096;
    case AV_CODEC_ID_ADPCM_IMA_WAV:
        return (block_align - 4 * channels) * 8 / (4 * channels) + 1;
    case AV_CODEC_ID_ADPCM_MS:
        return (block_align - 7 * channels) * 2 / channels + 2;
    default:
        return 0;
    }
}

static int caf_write_header(AVFormatContext *s)
{
    AVIOContext *pb = s->pb;
    AVCodecContext *enc = s->streams[0]->codec;
    CAFContext *caf = s->priv_data;
    AVDictionaryEntry *t = NULL;
    unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, enc->codec_id);
    int64_t chunk_size = 0;
    int frame_size = enc->frame_size;

    if (s->nb_streams != 1) {
        av_log(s, AV_LOG_ERROR, "CAF files have exactly one stream\n");
        return AVERROR(EINVAL);
    }

    switch (enc->codec_id) {
    case AV_CODEC_ID_AAC:
        av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n");
        return AVERROR_PATCHWELCOME;
    }

    switch (enc->codec_id) {
    case AV_CODEC_ID_PCM_S8:
    case AV_CODEC_ID_PCM_S16LE:
    case AV_CODEC_ID_PCM_S16BE:
    case AV_CODEC_ID_PCM_S24LE:
    case AV_CODEC_ID_PCM_S24BE:
    case AV_CODEC_ID_PCM_S32LE:
    case AV_CODEC_ID_PCM_S32BE:
    case AV_CODEC_ID_PCM_F32LE:
    case AV_CODEC_ID_PCM_F32BE:
    case AV_CODEC_ID_PCM_F64LE:
    case AV_CODEC_ID_PCM_F64BE:
        codec_tag = MKTAG('l','p','c','m');
    }

    if (!codec_tag) {
        av_log(s, AV_LOG_ERROR, "unsupported codec\n");
        return AVERROR_INVALIDDATA;
    }

    if (!enc->block_align && !pb->seekable) {
        av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n");
        return AVERROR_INVALIDDATA;
    }

    if (enc->codec_id != AV_CODEC_ID_MP3 || frame_size != 576)
        frame_size = samples_per_packet(enc->codec_id, enc->channels, enc->block_align);

    ffio_wfourcc(pb, "caff"); //< mFileType
    avio_wb16(pb, 1);         //< mFileVersion
    avio_wb16(pb, 0);         //< mFileFlags

    ffio_wfourcc(pb, "desc");                         //< Audio Description chunk
    avio_wb64(pb, 32);                                //< mChunkSize
    avio_wb64(pb, av_double2int(enc->sample_rate));   //< mSampleRate
    avio_wl32(pb, codec_tag);                         //< mFormatID
    avio_wb32(pb, codec_flags(enc->codec_id));        //< mFormatFlags
    avio_wb32(pb, enc->block_align);                  //< mBytesPerPacket
    avio_wb32(pb, frame_size);                        //< mFramesPerPacket
    avio_wb32(pb, enc->channels);                     //< mChannelsPerFrame
    avio_wb32(pb, av_get_bits_per_sample(enc->codec_id)); //< mBitsPerChannel

    if (enc->channel_layout) {
        ffio_wfourcc(pb, "chan");
        avio_wb64(pb, 12);
        ff_mov_write_chan(pb, enc->channel_layout);
    }

    if (enc->codec_id == AV_CODEC_ID_ALAC) {
        ffio_wfourcc(pb, "kuki");
        avio_wb64(pb, 12 + enc->extradata_size);
        avio_write(pb, "\0\0\0\14frmaalac", 12);
        avio_write(pb, enc->extradata, enc->extradata_size);
    } else if (enc->codec_id == AV_CODEC_ID_AMR_NB) {
        ffio_wfourcc(pb, "kuki");
        avio_wb64(pb, 29);
        avio_write(pb, "\0\0\0\14frmasamr", 12);
        avio_wb32(pb, 0x11); /* size */
        avio_write(pb, "samrFFMP", 8);
        avio_w8(pb, 0); /* decoder version */

        avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
        avio_w8(pb, 0x00); /* Mode change period (no restriction) */
        avio_w8(pb, 0x01); /* Frames per sample */
    } else if (enc->codec_id == AV_CODEC_ID_QDM2) {
        ffio_wfourcc(pb, "kuki");
        avio_wb64(pb, enc->extradata_size);
        avio_write(pb, enc->extradata, enc->extradata_size);
    }

    if (av_dict_count(s->metadata)) {
        ffio_wfourcc(pb, "info"); //< Information chunk
        while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
            chunk_size += strlen(t->key) + strlen(t->value) + 2;
        }
        avio_wb64(pb, chunk_size + 4);
        avio_wb32(pb, av_dict_count(s->metadata));
        t = NULL;
        while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
            avio_put_str(pb, t->key);
            avio_put_str(pb, t->value);
        }
    }

    ffio_wfourcc(pb, "data"); //< Audio Data chunk
    caf->data = avio_tell(pb);
    avio_wb64(pb, -1);        //< mChunkSize
    avio_wb32(pb, 0);         //< mEditCount

    avio_flush(pb);
    return 0;
}

static int caf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    CAFContext *caf = s->priv_data;

    avio_write(s->pb, pkt->data, pkt->size);
    if (!s->streams[0]->codec->block_align) {
        void *pkt_sizes = caf->pkt_sizes;
        int i, alloc_size = caf->size_entries_used + 5;
        if (alloc_size < 0) {
            caf->pkt_sizes = NULL;
        } else {
            caf->pkt_sizes = av_fast_realloc(caf->pkt_sizes,
                                             &caf->size_buffer_size,
                                             alloc_size);
        }
        if (!caf->pkt_sizes) {
            av_free(pkt_sizes);
            return AVERROR(ENOMEM);
        }
        for (i = 4; i > 0; i--) {
            unsigned top = pkt->size >> i * 7;
            if (top)
                caf->pkt_sizes[caf->size_entries_used++] = 128 | top;
        }
        caf->pkt_sizes[caf->size_entries_used++] = pkt->size & 127;
        caf->packets++;
    }
    return 0;
}

static int caf_write_trailer(AVFormatContext *s)
{
    CAFContext *caf = s->priv_data;
    AVIOContext *pb = s->pb;
    AVCodecContext *enc = s->streams[0]->codec;

    if (pb->seekable) {
        int64_t file_size = avio_tell(pb);

        avio_seek(pb, caf->data, SEEK_SET);
        avio_wb64(pb, file_size - caf->data - 8);
        avio_seek(pb, file_size, SEEK_SET);
        if (!enc->block_align) {
            ffio_wfourcc(pb, "pakt");
            avio_wb64(pb, caf->size_entries_used + 24);
            avio_wb64(pb, caf->packets); ///< mNumberPackets
            avio_wb64(pb, caf->packets * samples_per_packet(enc->codec_id, enc->channels, enc->block_align)); ///< mNumberValidFrames
            avio_wb32(pb, 0); ///< mPrimingFrames
            avio_wb32(pb, 0); ///< mRemainderFrames
            avio_write(pb, caf->pkt_sizes, caf->size_entries_used);
            caf->size_buffer_size = 0;
        }
        avio_flush(pb);
    }
    av_freep(&caf->pkt_sizes);
    return 0;
}

AVOutputFormat ff_caf_muxer = {
    .name           = "caf",
    .long_name      = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
    .mime_type      = "audio/x-caf",
    .extensions     = "caf",
    .priv_data_size = sizeof(CAFContext),
    .audio_codec    = AV_CODEC_ID_PCM_S16BE,
    .video_codec    = AV_CODEC_ID_NONE,
    .write_header   = caf_write_header,
    .write_packet   = caf_write_packet,
    .write_trailer  = caf_write_trailer,
    .codec_tag      = (const AVCodecTag* const []){ff_codec_caf_tags, 0},
};
Commit	Line	Data
2ba45a60 DM	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	static uint32_t codec_flags(enum AVCodecID codec_id) {
	38	switch (codec_id) {
	39	case AV_CODEC_ID_PCM_F32BE:
	40	case AV_CODEC_ID_PCM_F64BE:
	41	return 1; //< kCAFLinearPCMFormatFlagIsFloat
	42	case AV_CODEC_ID_PCM_S16LE:
	43	case AV_CODEC_ID_PCM_S24LE:
	44	case AV_CODEC_ID_PCM_S32LE:
	45	return 2; //< kCAFLinearPCMFormatFlagIsLittleEndian
	46	case AV_CODEC_ID_PCM_F32LE:
	47	case AV_CODEC_ID_PCM_F64LE:
	48	return 3; //< kCAFLinearPCMFormatFlagIsFloat \| kCAFLinearPCMFormatFlagIsLittleEndian
	49	default:
	50	return 0;
	51	}
	52	}
	53
	54	static uint32_t samples_per_packet(enum AVCodecID codec_id, int channels, int block_align) {
	55	switch (codec_id) {
	56	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	return 1;
70	case AV_CODEC_ID_MACE3:
71	case AV_CODEC_ID_MACE6:
72	return 6;
73	case AV_CODEC_ID_ADPCM_IMA_QT:
74	return 64;
75	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	return 160;
80	case AV_CODEC_ID_GSM_MS:
81	return 320;
82	case AV_CODEC_ID_MP1:
83	return 384;
84	case AV_CODEC_ID_MP2:
85	case AV_CODEC_ID_MP3:
86	return 1152;
87	case AV_CODEC_ID_AC3:
88	return 1536;
89	case AV_CODEC_ID_QDM2:
90	return 2048 * channels;
91	case AV_CODEC_ID_ALAC:
92	return 4096;
93	case AV_CODEC_ID_ADPCM_IMA_WAV:
94	return (block_align - 4 * channels) * 8 / (4 * channels) + 1;
95	case AV_CODEC_ID_ADPCM_MS:
96	return (block_align - 7 * channels) * 2 / channels + 2;
97	default:
98	return 0;
99	}
100	}
101
102	static int caf_write_header(AVFormatContext *s)
103	{
104	AVIOContext *pb = s->pb;
105	AVCodecContext *enc = s->streams[0]->codec;
106	CAFContext *caf = s->priv_data;
107	AVDictionaryEntry *t = NULL;
108	unsigned int codec_tag = ff_codec_get_tag(ff_codec_caf_tags, enc->codec_id);
109	int64_t chunk_size = 0;
110	int frame_size = enc->frame_size;
111
112	if (s->nb_streams != 1) {
113	av_log(s, AV_LOG_ERROR, "CAF files have exactly one stream\n");
114	return AVERROR(EINVAL);
115	}
116
117	switch (enc->codec_id) {
118	case AV_CODEC_ID_AAC:
119	av_log(s, AV_LOG_ERROR, "muxing codec currently unsupported\n");
120	return AVERROR_PATCHWELCOME;
121	}
122
123	switch (enc->codec_id) {
124	case AV_CODEC_ID_PCM_S8:
125	case AV_CODEC_ID_PCM_S16LE:
126	case AV_CODEC_ID_PCM_S16BE:
127	case AV_CODEC_ID_PCM_S24LE:
128	case AV_CODEC_ID_PCM_S24BE:
129	case AV_CODEC_ID_PCM_S32LE:
130	case AV_CODEC_ID_PCM_S32BE:
131	case AV_CODEC_ID_PCM_F32LE:
132	case AV_CODEC_ID_PCM_F32BE:
133	case AV_CODEC_ID_PCM_F64LE:
134	case AV_CODEC_ID_PCM_F64BE:
135	codec_tag = MKTAG('l','p','c','m');
136	}
137
138	if (!codec_tag) {
139	av_log(s, AV_LOG_ERROR, "unsupported codec\n");
140	return AVERROR_INVALIDDATA;
141	}
142
143	if (!enc->block_align && !pb->seekable) {
144	av_log(s, AV_LOG_ERROR, "Muxing variable packet size not supported on non seekable output\n");
145	return AVERROR_INVALIDDATA;
146	}
147
148	if (enc->codec_id != AV_CODEC_ID_MP3 \|\| frame_size != 576)
149	frame_size = samples_per_packet(enc->codec_id, enc->channels, enc->block_align);
150
151	ffio_wfourcc(pb, "caff"); //< mFileType
152	avio_wb16(pb, 1); //< mFileVersion
153	avio_wb16(pb, 0); //< mFileFlags
154
155	ffio_wfourcc(pb, "desc"); //< Audio Description chunk
156	avio_wb64(pb, 32); //< mChunkSize
157	avio_wb64(pb, av_double2int(enc->sample_rate)); //< mSampleRate
158	avio_wl32(pb, codec_tag); //< mFormatID
159	avio_wb32(pb, codec_flags(enc->codec_id)); //< mFormatFlags
160	avio_wb32(pb, enc->block_align); //< mBytesPerPacket
161	avio_wb32(pb, frame_size); //< mFramesPerPacket
162	avio_wb32(pb, enc->channels); //< mChannelsPerFrame
163	avio_wb32(pb, av_get_bits_per_sample(enc->codec_id)); //< mBitsPerChannel
164
165	if (enc->channel_layout) {
166	ffio_wfourcc(pb, "chan");
167	avio_wb64(pb, 12);
168	ff_mov_write_chan(pb, enc->channel_layout);
169	}
170
171	if (enc->codec_id == AV_CODEC_ID_ALAC) {
172	ffio_wfourcc(pb, "kuki");
173	avio_wb64(pb, 12 + enc->extradata_size);
174	avio_write(pb, "\0\0\0\14frmaalac", 12);
175	avio_write(pb, enc->extradata, enc->extradata_size);
176	} else if (enc->codec_id == AV_CODEC_ID_AMR_NB) {
177	ffio_wfourcc(pb, "kuki");
178	avio_wb64(pb, 29);
179	avio_write(pb, "\0\0\0\14frmasamr", 12);
180	avio_wb32(pb, 0x11); /* size */
181	avio_write(pb, "samrFFMP", 8);
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 */
187	} else if (enc->codec_id == AV_CODEC_ID_QDM2) {
188	ffio_wfourcc(pb, "kuki");
189	avio_wb64(pb, enc->extradata_size);
190	avio_write(pb, enc->extradata, enc->extradata_size);
191	}
192
193	if (av_dict_count(s->metadata)) {
194	ffio_wfourcc(pb, "info"); //< Information chunk
195	while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
196	chunk_size += strlen(t->key) + strlen(t->value) + 2;
197	}
198	avio_wb64(pb, chunk_size + 4);
199	avio_wb32(pb, av_dict_count(s->metadata));
200	t = NULL;
201	while ((t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
202	avio_put_str(pb, t->key);
203	avio_put_str(pb, t->value);
204	}
205	}
206
207	ffio_wfourcc(pb, "data"); //< Audio Data chunk
208	caf->data = avio_tell(pb);
209	avio_wb64(pb, -1); //< mChunkSize
210	avio_wb32(pb, 0); //< mEditCount
211
212	avio_flush(pb);
213	return 0;
214	}
215
216	static int caf_write_packet(AVFormatContext s, AVPacket pkt)
217	{
218	CAFContext *caf = s->priv_data;
219
220	avio_write(s->pb, pkt->data, pkt->size);
221	if (!s->streams[0]->codec->block_align) {
222	void *pkt_sizes = caf->pkt_sizes;
223	int i, alloc_size = caf->size_entries_used + 5;
224	if (alloc_size < 0) {
225	caf->pkt_sizes = NULL;
226	} else {
227	caf->pkt_sizes = av_fast_realloc(caf->pkt_sizes,
228	&caf->size_buffer_size,
229	alloc_size);
230	}
231	if (!caf->pkt_sizes) {
232	av_free(pkt_sizes);
233	return AVERROR(ENOMEM);
234	}
235	for (i = 4; i > 0; i--) {
236	unsigned top = pkt->size >> i * 7;
237	if (top)
238	caf->pkt_sizes[caf->size_entries_used++] = 128 \| top;
239	}
240	caf->pkt_sizes[caf->size_entries_used++] = pkt->size & 127;
241	caf->packets++;
242	}
243	return 0;
244	}
245
246	static int caf_write_trailer(AVFormatContext *s)
247	{
248	CAFContext *caf = s->priv_data;
249	AVIOContext *pb = s->pb;
250	AVCodecContext *enc = s->streams[0]->codec;
251
252	if (pb->seekable) {
253	int64_t file_size = avio_tell(pb);
254
255	avio_seek(pb, caf->data, SEEK_SET);
256	avio_wb64(pb, file_size - caf->data - 8);
257	avio_seek(pb, file_size, SEEK_SET);
258	if (!enc->block_align) {
259	ffio_wfourcc(pb, "pakt");
260	avio_wb64(pb, caf->size_entries_used + 24);
261	avio_wb64(pb, caf->packets); ///< mNumberPackets
262	avio_wb64(pb, caf->packets * samples_per_packet(enc->codec_id, enc->channels, enc->block_align)); ///< mNumberValidFrames
263	avio_wb32(pb, 0); ///< mPrimingFrames
264	avio_wb32(pb, 0); ///< mRemainderFrames
265	avio_write(pb, caf->pkt_sizes, caf->size_entries_used);
266	caf->size_buffer_size = 0;
267	}
268	avio_flush(pb);
269	}
270	av_freep(&caf->pkt_sizes);
271	return 0;
272	}
273
274	AVOutputFormat ff_caf_muxer = {
275	.name = "caf",
276	.long_name = NULL_IF_CONFIG_SMALL("Apple CAF (Core Audio Format)"),
277	.mime_type = "audio/x-caf",
278	.extensions = "caf",
279	.priv_data_size = sizeof(CAFContext),
280	.audio_codec = AV_CODEC_ID_PCM_S16BE,
281	.video_codec = AV_CODEC_ID_NONE,
282	.write_header = caf_write_header,
283	.write_packet = caf_write_packet,
284	.write_trailer = caf_write_trailer,
285	.codec_tag = (const AVCodecTag* const []){ff_codec_caf_tags, 0},
286	};