lavf: add the notimestamps flag to the muxers missing it
[libav.git] / libavformat / riffenc.c
1 /*
2 * RIFF muxing functions
3 * Copyright (c) 2000 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
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"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "riff.h"
30
31 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
32 {
33 ffio_wfourcc(pb, tag);
34 avio_wl32(pb, 0);
35 return avio_tell(pb);
36 }
37
38 void ff_end_tag(AVIOContext *pb, int64_t start)
39 {
40 int64_t pos;
41
42 pos = avio_tell(pb);
43 avio_seek(pb, start - 4, SEEK_SET);
44 avio_wl32(pb, (uint32_t)(pos - start));
45 avio_seek(pb, pos, SEEK_SET);
46 }
47
48 /* WAVEFORMATEX header */
49 /* returns the size or -1 on error */
50 int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
51 {
52 int bps, blkalign, bytespersec, frame_size;
53 int hdrsize = 18;
54 int waveformatextensible;
55 uint8_t temp[256];
56 uint8_t *riff_extradata = temp;
57 uint8_t *riff_extradata_start = temp;
58
59 if (!enc->codec_tag || enc->codec_tag > 0xffff)
60 return -1;
61
62 /* We use the known constant frame size for the codec if known, otherwise
63 * fall back on using AVCodecContext.frame_size, which is not as reliable
64 * for indicating packet duration. */
65 frame_size = av_get_audio_frame_duration(enc, enc->block_align);
66 if (!frame_size)
67 frame_size = enc->frame_size;
68
69 waveformatextensible = (enc->channels > 2 && enc->channel_layout) ||
70 enc->sample_rate > 48000 ||
71 av_get_bits_per_sample(enc->codec_id) > 16;
72
73 if (waveformatextensible)
74 avio_wl16(pb, 0xfffe);
75 else
76 avio_wl16(pb, enc->codec_tag);
77
78 avio_wl16(pb, enc->channels);
79 avio_wl32(pb, enc->sample_rate);
80 if (enc->codec_id == AV_CODEC_ID_MP2 ||
81 enc->codec_id == AV_CODEC_ID_MP3 ||
82 enc->codec_id == AV_CODEC_ID_GSM_MS) {
83 bps = 0;
84 } else {
85 if (!(bps = av_get_bits_per_sample(enc->codec_id))) {
86 if (enc->bits_per_coded_sample)
87 bps = enc->bits_per_coded_sample;
88 else
89 bps = 16; // default to 16
90 }
91 }
92 if (bps != enc->bits_per_coded_sample && enc->bits_per_coded_sample) {
93 av_log(enc, AV_LOG_WARNING,
94 "requested bits_per_coded_sample (%d) "
95 "and actually stored (%d) differ\n",
96 enc->bits_per_coded_sample, bps);
97 }
98
99 if (enc->codec_id == AV_CODEC_ID_MP2 ||
100 enc->codec_id == AV_CODEC_ID_MP3) {
101 /* This is wrong, but it seems many demuxers do not work if this
102 * is set correctly. */
103 blkalign = frame_size;
104 // blkalign = 144 * enc->bit_rate/enc->sample_rate;
105 } else if (enc->codec_id == AV_CODEC_ID_AC3) {
106 blkalign = 3840; /* maximum bytes per frame */
107 } else if (enc->block_align != 0) { /* specified by the codec */
108 blkalign = enc->block_align;
109 } else
110 blkalign = bps * enc->channels / av_gcd(8, bps);
111 if (enc->codec_id == AV_CODEC_ID_PCM_U8 ||
112 enc->codec_id == AV_CODEC_ID_PCM_S24LE ||
113 enc->codec_id == AV_CODEC_ID_PCM_S32LE ||
114 enc->codec_id == AV_CODEC_ID_PCM_F32LE ||
115 enc->codec_id == AV_CODEC_ID_PCM_F64LE ||
116 enc->codec_id == AV_CODEC_ID_PCM_S16LE) {
117 bytespersec = enc->sample_rate * blkalign;
118 } else {
119 bytespersec = enc->bit_rate / 8;
120 }
121 avio_wl32(pb, bytespersec); /* bytes per second */
122 avio_wl16(pb, blkalign); /* block align */
123 avio_wl16(pb, bps); /* bits per sample */
124 if (enc->codec_id == AV_CODEC_ID_MP3) {
125 hdrsize += 12;
126 bytestream_put_le16(&riff_extradata, 1); /* wID */
127 bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */
128 bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
129 bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */
130 bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
131 } else if (enc->codec_id == AV_CODEC_ID_MP2) {
132 hdrsize += 22;
133 /* fwHeadLayer */
134 bytestream_put_le16(&riff_extradata, 2);
135 /* dwHeadBitrate */
136 bytestream_put_le32(&riff_extradata, enc->bit_rate);
137 /* fwHeadMode */
138 bytestream_put_le16(&riff_extradata, enc->channels == 2 ? 1 : 8);
139 /* fwHeadModeExt */
140 bytestream_put_le16(&riff_extradata, 0);
141 /* wHeadEmphasis */
142 bytestream_put_le16(&riff_extradata, 1);
143 /* fwHeadFlags */
144 bytestream_put_le16(&riff_extradata, 16);
145 /* dwPTSLow */
146 bytestream_put_le32(&riff_extradata, 0);
147 /* dwPTSHigh */
148 bytestream_put_le32(&riff_extradata, 0);
149 } else if (enc->codec_id == AV_CODEC_ID_GSM_MS ||
150 enc->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
151 hdrsize += 2;
152 /* wSamplesPerBlock */
153 bytestream_put_le16(&riff_extradata, frame_size);
154 } else if (enc->extradata_size) {
155 riff_extradata_start = enc->extradata;
156 riff_extradata = enc->extradata + enc->extradata_size;
157 hdrsize += enc->extradata_size;
158 }
159 /* write WAVEFORMATEXTENSIBLE extensions */
160 if (waveformatextensible) {
161 hdrsize += 22;
162 /* 22 is WAVEFORMATEXTENSIBLE size */
163 avio_wl16(pb, riff_extradata - riff_extradata_start + 22);
164 /* ValidBitsPerSample || SamplesPerBlock || Reserved */
165 avio_wl16(pb, bps);
166 /* dwChannelMask */
167 avio_wl32(pb, enc->channel_layout);
168 /* GUID + next 3 */
169 avio_wl32(pb, enc->codec_tag);
170 avio_wl32(pb, 0x00100000);
171 avio_wl32(pb, 0xAA000080);
172 avio_wl32(pb, 0x719B3800);
173 } else {
174 avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
175 }
176 avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
177 if (hdrsize & 1) {
178 hdrsize++;
179 avio_w8(pb, 0);
180 }
181
182 return hdrsize;
183 }
184
185 /* BITMAPINFOHEADER header */
186 void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc,
187 const AVCodecTag *tags, int for_asf)
188 {
189 /* size */
190 avio_wl32(pb, 40 + enc->extradata_size);
191 avio_wl32(pb, enc->width);
192 //We always store RGB TopDown
193 avio_wl32(pb, enc->codec_tag ? enc->height : -enc->height);
194 /* planes */
195 avio_wl16(pb, 1);
196 /* depth */
197 avio_wl16(pb, enc->bits_per_coded_sample ? enc->bits_per_coded_sample : 24);
198 /* compression type */
199 avio_wl32(pb, enc->codec_tag);
200 avio_wl32(pb, enc->width * enc->height * 3);
201 avio_wl32(pb, 0);
202 avio_wl32(pb, 0);
203 avio_wl32(pb, 0);
204 avio_wl32(pb, 0);
205
206 avio_write(pb, enc->extradata, enc->extradata_size);
207
208 if (!for_asf && enc->extradata_size & 1)
209 avio_w8(pb, 0);
210 }
211
212 void ff_parse_specific_params(AVCodecContext *stream, int *au_rate,
213 int *au_ssize, int *au_scale)
214 {
215 int gcd;
216 int audio_frame_size;
217
218 /* We use the known constant frame size for the codec if known, otherwise
219 * fall back on using AVCodecContext.frame_size, which is not as reliable
220 * for indicating packet duration. */
221 audio_frame_size = av_get_audio_frame_duration(stream, 0);
222 if (!audio_frame_size)
223 audio_frame_size = stream->frame_size;
224
225 *au_ssize = stream->block_align;
226 if (audio_frame_size && stream->sample_rate) {
227 *au_scale = audio_frame_size;
228 *au_rate = stream->sample_rate;
229 } else if (stream->codec_type == AVMEDIA_TYPE_VIDEO ||
230 stream->codec_type == AVMEDIA_TYPE_DATA ||
231 stream->codec_type == AVMEDIA_TYPE_SUBTITLE) {
232 *au_scale = stream->time_base.num;
233 *au_rate = stream->time_base.den;
234 } else {
235 *au_scale = stream->block_align ? stream->block_align * 8 : 8;
236 *au_rate = stream->bit_rate ? stream->bit_rate :
237 8 * stream->sample_rate;
238 }
239 gcd = av_gcd(*au_scale, *au_rate);
240 *au_scale /= gcd;
241 *au_rate /= gcd;
242 }
243
244 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
245 {
246 int len = strlen(str);
247 if (len > 0) {
248 len++;
249 ffio_wfourcc(pb, tag);
250 avio_wl32(pb, len);
251 avio_put_str(pb, str);
252 if (len & 1)
253 avio_w8(pb, 0);
254 }
255 }
256
257 static const char riff_tags[][5] = {
258 "IARL", "IART", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
259 "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
260 "IPRT", "ITRK", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
261 { 0 }
262 };
263
264 static int riff_has_valid_tags(AVFormatContext *s)
265 {
266 int i;
267
268 for (i = 0; *riff_tags[i]; i++)
269 if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE))
270 return 1;
271
272 return 0;
273 }
274
275 void ff_riff_write_info(AVFormatContext *s)
276 {
277 AVIOContext *pb = s->pb;
278 int i;
279 int64_t list_pos;
280 AVDictionaryEntry *t = NULL;
281
282 ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);
283
284 /* writing empty LIST is not nice and may cause problems */
285 if (!riff_has_valid_tags(s))
286 return;
287
288 list_pos = ff_start_tag(pb, "LIST");
289 ffio_wfourcc(pb, "INFO");
290 for (i = 0; *riff_tags[i]; i++)
291 if ((t = av_dict_get(s->metadata, riff_tags[i],
292 NULL, AV_DICT_MATCH_CASE)))
293 ff_riff_write_info_tag(s->pb, t->key, t->value);
294 ff_end_tag(pb, list_pos);
295 }