2 * RIFF muxing functions
3 * Copyright (c) 2000 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/dict.h"
23 #include "libavutil/log.h"
24 #include "libavutil/mathematics.h"
25 #include "libavcodec/avcodec.h"
26 #include "libavcodec/bytestream.h"
28 #include "avio_internal.h"
31 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
33 ffio_wfourcc(pb, tag);
38 void ff_end_tag(AVIOContext *pb, int64_t start)
42 av_assert0((start&1) == 0);
47 avio_seek(pb, start - 4, SEEK_SET);
48 avio_wl32(pb, (uint32_t)(pos - start));
49 avio_seek(pb, FFALIGN(pos, 2), SEEK_SET);
52 /* WAVEFORMATEX header */
53 /* returns the size or -1 on error */
54 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
56 int bps, blkalign, bytespersec, frame_size;
58 int64_t hdrstart = avio_tell(pb);
59 int waveformatextensible;
61 uint8_t *riff_extradata = temp;
62 uint8_t *riff_extradata_start = temp;
64 if (!enc->codec_tag || enc->codec_tag > 0xffff)
67 /* We use the known constant frame size for the codec if known, otherwise
68 * fall back on using AVCodecContext.frame_size, which is not as reliable
69 * for indicating packet duration. */
70 frame_size = av_get_audio_frame_duration(enc, 0);
72 frame_size = enc->frame_size;
74 waveformatextensible = (enc->channels > 2 && enc->channel_layout) ||
75 enc->sample_rate > 48000 ||
76 enc->codec_id == AV_CODEC_ID_EAC3 ||
77 av_get_bits_per_sample(enc->codec_id) > 16;
79 if (waveformatextensible)
80 avio_wl16(pb, 0xfffe);
82 avio_wl16(pb, enc->codec_tag);
84 avio_wl16(pb, enc->channels);
85 avio_wl32(pb, enc->sample_rate);
86 if (enc->codec_id == AV_CODEC_ID_ATRAC3 ||
87 enc->codec_id == AV_CODEC_ID_G723_1 ||
88 enc->codec_id == AV_CODEC_ID_MP2 ||
89 enc->codec_id == AV_CODEC_ID_MP3 ||
90 enc->codec_id == AV_CODEC_ID_GSM_MS) {
93 if (!(bps = av_get_bits_per_sample(enc->codec_id))) {
94 if (enc->bits_per_coded_sample)
95 bps = enc->bits_per_coded_sample;
97 bps = 16; // default to 16
100 if (bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample) {
101 av_log(enc, AV_LOG_WARNING,
102 "requested bits_per_coded_sample (%d) "
103 "and actually stored (%d) differ\n",
104 enc->bits_per_coded_sample, bps);
107 if (enc->codec_id == AV_CODEC_ID_MP2 ||
108 enc->codec_id == AV_CODEC_ID_MP3) {
109 /* This is wrong, but it seems many demuxers do not work if this
110 * is set correctly. */
111 blkalign = frame_size;
112 // blkalign = 144 * enc->bit_rate/enc->sample_rate;
113 } else if (enc->codec_id == AV_CODEC_ID_AC3) {
114 blkalign = 3840; /* maximum bytes per frame */
115 } else if (enc->codec_id == AV_CODEC_ID_AAC) {
116 blkalign = 768 * enc->channels; /* maximum bytes per frame */
117 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
119 } else if (enc->block_align != 0) { /* specified by the codec */
120 blkalign = enc->block_align;
122 blkalign = bps * enc->channels / av_gcd(8, bps);
123 if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||
124 enc->codec_id == AV_CODEC_ID_PCM_S24LE ||
125 enc->codec_id == AV_CODEC_ID_PCM_S32LE ||
126 enc->codec_id == AV_CODEC_ID_PCM_F32LE ||
127 enc->codec_id == AV_CODEC_ID_PCM_F64LE ||
128 enc->codec_id == AV_CODEC_ID_PCM_S16LE) {
129 bytespersec = enc->sample_rate * blkalign;
130 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
133 bytespersec = enc->bit_rate / 8;
135 avio_wl32(pb, bytespersec); /* bytes per second */
136 avio_wl16(pb, blkalign); /* block align */
137 avio_wl16(pb, bps); /* bits per sample */
138 if (enc->codec_id == AV_CODEC_ID_MP3) {
139 bytestream_put_le16(&riff_extradata, 1); /* wID */
140 bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */
141 bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
142 bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */
143 bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
144 } else if (enc->codec_id == AV_CODEC_ID_MP2) {
146 bytestream_put_le16(&riff_extradata, 2);
148 bytestream_put_le32(&riff_extradata, enc->bit_rate);
150 bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8);
152 bytestream_put_le16(&riff_extradata, 0);
154 bytestream_put_le16(&riff_extradata, 1);
156 bytestream_put_le16(&riff_extradata, 16);
158 bytestream_put_le32(&riff_extradata, 0);
160 bytestream_put_le32(&riff_extradata, 0);
161 } else if (enc->codec_id == AV_CODEC_ID_G723_1) {
162 bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
163 bytestream_put_le32(&riff_extradata, 0xaea2f732);
164 bytestream_put_le16(&riff_extradata, 0xacde);
165 } else if (enc->codec_id == AV_CODEC_ID_GSM_MS ||
166 enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
167 /* wSamplesPerBlock */
168 bytestream_put_le16(&riff_extradata, frame_size);
169 } else if (enc->extradata_size) {
170 riff_extradata_start = enc->extradata;
171 riff_extradata = enc->extradata + enc->extradata_size;
173 /* write WAVEFORMATEXTENSIBLE extensions */
174 if (waveformatextensible) {
175 /* 22 is WAVEFORMATEXTENSIBLE size */
176 avio_wl16(pb, riff_extradata - riff_extradata_start + 22);
177 /* ValidBitsPerSample || SamplesPerBlock || Reserved */
180 avio_wl32(pb, enc->channel_layout);
182 if (enc->codec_id == AV_CODEC_ID_EAC3) {
183 ff_put_guid(pb, get_codec_guid(enc->codec_id, ff_codec_wav_guids));
185 avio_wl32(pb, enc->codec_tag);
186 avio_wl32(pb, 0x00100000);
187 avio_wl32(pb, 0xAA000080);
188 avio_wl32(pb, 0x719B3800);
191 avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
193 avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
194 hdrsize = avio_tell(pb) - hdrstart;
203 /* BITMAPINFOHEADER header */
204 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
205 const AVCodecTag *tags, int for_asf, int ignore_extradata)
208 avio_wl32(pb, 40 + (ignore_extradata ? 0 : enc->extradata_size));
209 avio_wl32(pb, enc->width);
210 //We always store RGB TopDown
211 avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
215 avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24);
216 /* compression type */
217 avio_wl32(pb, enc->codec_tag);
218 avio_wl32(pb, (enc->width * enc->height * (enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24)+7) / 8);
224 if (!ignore_extradata) {
225 avio_write(pb, enc->extradata, enc->extradata_size);
227 if (!for_asf && enc->extradata_size & 1)
232 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate,
233 int *au_ssize, int *au_scale)
236 int audio_frame_size;
238 /* We use the known constant frame size for the codec if known, otherwise
239 * fall back on using AVCodecContext.frame_size, which is not as reliable
240 * for indicating packet duration. */
241 audio_frame_size = av_get_audio_frame_duration(stream, 0);
242 if (!audio_frame_size)
243 audio_frame_size = stream->frame_size;
245 *au_ssize = stream->block_align;
246 if (audio_frame_size && stream->sample_rate) {
247 *au_scale = audio_frame_size;
248 *au_rate = stream->sample_rate;
249 } else if (stream->codec_type == AVMEDIA_TYPE_VIDEO ||
250 stream->codec_type == AVMEDIA_TYPE_DATA ||
251 stream->codec_type == AVMEDIA_TYPE_SUBTITLE) {
252 *au_scale = stream->time_base.num;
253 *au_rate = stream->time_base.den;
255 *au_scale = stream->block_align ? stream->block_align * 8 : 8;
256 *au_rate = stream->bit_rate ? stream->bit_rate :
257 8 * stream->sample_rate;
259 gcd = av_gcd(*au_scale, *au_rate);
264 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
266 int len = strlen(str);
269 ffio_wfourcc(pb, tag);
271 avio_put_str(pb, str);
277 static const char riff_tags[][5] = {
278 "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
279 "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
280 "IPRT", "ITRK", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
284 static int riff_has_valid_tags(AVFormatContext *s)
288 for (i = 0; *riff_tags[i]; i++)
289 if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE))
295 void ff_riff_write_info(AVFormatContext *s)
297 AVIOContext *pb = s->pb;
300 AVDictionaryEntry *t = NULL;
302 ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);
304 /* writing empty LIST is not nice and may cause problems */
305 if (!riff_has_valid_tags(s))
308 list_pos = ff_start_tag(pb, "LIST");
309 ffio_wfourcc(pb, "INFO");
310 for (i = 0; *riff_tags[i]; i++)
311 if ((t = av_dict_get(s->metadata, riff_tags[i],
312 NULL, AV_DICT_MATCH_CASE)))
313 ff_riff_write_info_tag(s->pb, t->key, t->value);
314 ff_end_tag(pb, list_pos);
317 void ff_put_guid(AVIOContext *s, const ff_asf_guid *g)
319 av_assert0(sizeof(*g) == 16);
320 avio_write(s, *g, sizeof(*g));
323 const ff_asf_guid *get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid)
326 for (i = 0; av_guid[i].id != AV_CODEC_ID_NONE; i++) {
327 if (id == av_guid[i].id)
328 return &(av_guid[i].guid);