FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/riffenc.c
Date: 2025-06-01 09:29:47
Exec Total Coverage
Lines: 186 210 88.6%
Functions: 10 10 100.0%
Branches: 159 206 77.2%
Line Branch Exec Source
1 /*
2 * RIFF muxing functions
3 * Copyright (c) 2000 Fabrice Bellard
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 "libavutil/channel_layout.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/log.h"
25 #include "libavutil/mathematics.h"
26 #include "libavcodec/bytestream.h"
27 #include "avformat.h"
28 #include "avio_internal.h"
29 #include "riff.h"
30
31 4373 int64_t ff_start_tag(AVIOContext *pb, const char *tag)
32 {
33 4373 ffio_wfourcc(pb, tag);
34 4373 avio_wl32(pb, -1);
35 4373 return avio_tell(pb);
36 }
37
38 4017 void ff_end_tag(AVIOContext *pb, int64_t start)
39 {
40 int64_t pos;
41
42
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 4017 av_assert0((start&1) == 0);
43
44 4017 pos = avio_tell(pb);
45
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 4017 if (pos & 1)
46 1 avio_w8(pb, 0);
47 4017 avio_seek(pb, start - 4, SEEK_SET);
48 4017 avio_wl32(pb, (uint32_t)(pos - start));
49 4017 avio_seek(pb, FFALIGN(pos, 2), SEEK_SET);
50 4017 }
51
52 /* WAVEFORMATEX header */
53 /* returns the size or -1 on error */
54 489 int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb,
55 AVCodecParameters *par, int flags)
56 {
57 int bps, blkalign, bytespersec, frame_size;
58 int hdrsize;
59 489 int64_t hdrstart = avio_tell(pb);
60 int waveformatextensible;
61 uint8_t temp[256];
62 489 uint8_t *riff_extradata = temp;
63 489 uint8_t *riff_extradata_start = temp;
64
65
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 489 if (!par->codec_tag || par->codec_tag > 0xffff)
66 ✗ return -1;
67
68
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 489 if (par->codec_id == AV_CODEC_ID_ADPCM_SWF && par->block_align == 0) {
69 ✗ av_log(s, AV_LOG_ERROR, "%s can only be written to WAVE with a constant frame size\n",
70 avcodec_get_name(par->codec_id));
71 ✗ return AVERROR(EINVAL);
72 }
73
74 /* We use the known constant frame size for the codec if known, otherwise
75 * fall back on using AVCodecParameters.frame_size, which is not as reliable
76 * for indicating packet duration. */
77 489 frame_size = av_get_audio_frame_duration2(par, par->block_align);
78
79
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 488 waveformatextensible = (par->ch_layout.order == AV_CHANNEL_ORDER_NATIVE &&
80
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 624 av_channel_layout_compare(&par->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_MONO) &&
81 136 av_channel_layout_compare(&par->ch_layout, &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) ||
82
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 487 par->sample_rate > 48000 ||
83
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 1417 par->codec_id == AV_CODEC_ID_EAC3 || par->codec_id == AV_CODEC_ID_DFPWM ||
84
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 439 (av_get_bits_per_sample(par->codec_id) > 16 && par->codec_tag != 0x0003);
85
86
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 489 if (waveformatextensible)
87 58 avio_wl16(pb, 0xfffe);
88 else
89 431 avio_wl16(pb, par->codec_tag);
90
91 489 avio_wl16(pb, par->ch_layout.nb_channels);
92 489 avio_wl32(pb, par->sample_rate);
93
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 489 if (par->codec_id == AV_CODEC_ID_ATRAC3 ||
94
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 489 par->codec_id == AV_CODEC_ID_G723_1 ||
95
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 489 par->codec_id == AV_CODEC_ID_MP2 ||
96
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 483 par->codec_id == AV_CODEC_ID_MP3 ||
97
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 483 par->codec_id == AV_CODEC_ID_GSM_MS) {
98 6 bps = 0;
99 } else {
100
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 483 if (!(bps = av_get_bits_per_sample(par->codec_id))) {
101
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 9 if (par->bits_per_coded_sample)
102 5 bps = par->bits_per_coded_sample;
103 else
104 4 bps = 16; // default to 16
105 }
106 }
107
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 489 if (bps != par->bits_per_coded_sample && par->bits_per_coded_sample) {
108 ✗ av_log(s, AV_LOG_WARNING,
109 "requested bits_per_coded_sample (%d) "
110 "and actually stored (%d) differ\n",
111 par->bits_per_coded_sample, bps);
112 }
113
114
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 489 if (par->codec_id == AV_CODEC_ID_MP2) {
115 6 blkalign = (144 * par->bit_rate - 1)/par->sample_rate + 1;
116
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 483 } else if (par->codec_id == AV_CODEC_ID_MP3) {
117 ✗ blkalign = 576 * (par->sample_rate <= (24000 + 32000)/2 ? 1 : 2);
118
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 483 } else if (par->codec_id == AV_CODEC_ID_AC3) {
119 ✗ blkalign = 3840; /* maximum bytes per frame */
120
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 483 } else if (par->codec_id == AV_CODEC_ID_AAC) {
121 ✗ blkalign = 768 * par->ch_layout.nb_channels; /* maximum bytes per frame */
122
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 483 } else if (par->codec_id == AV_CODEC_ID_G723_1) {
123 ✗ blkalign = 24;
124
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 483 } else if (par->block_align != 0) { /* specified by the codec */
125 478 blkalign = par->block_align;
126 } else
127 5 blkalign = bps * par->ch_layout.nb_channels / av_gcd(8, bps);
128
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 489 if (par->codec_id == AV_CODEC_ID_PCM_U8 ||
129
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 487 par->codec_id == AV_CODEC_ID_PCM_S24LE ||
130
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 481 par->codec_id == AV_CODEC_ID_PCM_S32LE ||
131
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 479 par->codec_id == AV_CODEC_ID_PCM_F32LE ||
132
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 478 par->codec_id == AV_CODEC_ID_PCM_F64LE ||
133
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 477 par->codec_id == AV_CODEC_ID_PCM_S16LE) {
134 464 bytespersec = par->sample_rate * blkalign;
135
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 25 } else if (par->codec_id == AV_CODEC_ID_G723_1) {
136 ✗ bytespersec = 800;
137 } else {
138 25 bytespersec = par->bit_rate / 8;
139 }
140 489 avio_wl32(pb, bytespersec); /* bytes per second */
141 489 avio_wl16(pb, blkalign); /* block align */
142 489 avio_wl16(pb, bps); /* bits per sample */
143
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 489 if (par->codec_id == AV_CODEC_ID_MP3) {
144 ✗ bytestream_put_le16(&riff_extradata, 1); /* wID */
145 ✗ bytestream_put_le32(&riff_extradata, 2); /* fdwFlags */
146 ✗ bytestream_put_le16(&riff_extradata, 1152); /* nBlockSize */
147 ✗ bytestream_put_le16(&riff_extradata, 1); /* nFramesPerBlock */
148 ✗ bytestream_put_le16(&riff_extradata, 1393); /* nCodecDelay */
149
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 489 } else if (par->codec_id == AV_CODEC_ID_MP2) {
150 /* fwHeadLayer */
151 6 bytestream_put_le16(&riff_extradata, 2);
152 /* dwHeadBitrate */
153 6 bytestream_put_le32(&riff_extradata, par->bit_rate);
154 /* fwHeadMode */
155
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 6 bytestream_put_le16(&riff_extradata, par->ch_layout.nb_channels == 2 ? 1 : 8);
156 /* fwHeadModeExt */
157 6 bytestream_put_le16(&riff_extradata, 0);
158 /* wHeadEmphasis */
159 6 bytestream_put_le16(&riff_extradata, 1);
160 /* fwHeadFlags */
161 6 bytestream_put_le16(&riff_extradata, 16);
162 /* dwPTSLow */
163 6 bytestream_put_le32(&riff_extradata, 0);
164 /* dwPTSHigh */
165 6 bytestream_put_le32(&riff_extradata, 0);
166
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 483 } else if (par->codec_id == AV_CODEC_ID_G723_1) {
167 ✗ bytestream_put_le32(&riff_extradata, 0x9ace0002); /* extradata needed for msacm g723.1 codec */
168 ✗ bytestream_put_le32(&riff_extradata, 0xaea2f732);
169 ✗ bytestream_put_le16(&riff_extradata, 0xacde);
170
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 483 } else if (par->codec_id == AV_CODEC_ID_GSM_MS ||
171
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 483 par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
172 /* wSamplesPerBlock */
173 2 bytestream_put_le16(&riff_extradata, frame_size);
174
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 481 } else if (par->extradata_size) {
175 7 riff_extradata_start = par->extradata;
176 7 riff_extradata = par->extradata + par->extradata_size;
177 }
178 /* write WAVEFORMATEXTENSIBLE extensions */
179
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 489 if (waveformatextensible) {
180
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 116 int write_channel_mask = !(flags & FF_PUT_WAV_HEADER_SKIP_CHANNELMASK) &&
181
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 58 (s->strict_std_compliance < FF_COMPLIANCE_NORMAL ||
182
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 58 par->ch_layout.u.mask < 0x40000);
183 /* 22 is WAVEFORMATEXTENSIBLE size */
184 58 avio_wl16(pb, riff_extradata - riff_extradata_start + 22);
185 /* ValidBitsPerSample || SamplesPerBlock || Reserved */
186 58 avio_wl16(pb, bps);
187 /* dwChannelMask */
188
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 58 avio_wl32(pb, write_channel_mask ? par->ch_layout.u.mask : 0);
189 /* GUID + next 3 */
190
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 58 if (par->codec_id == AV_CODEC_ID_EAC3 || par->codec_id == AV_CODEC_ID_DFPWM) {
191 ✗ ff_put_guid(pb, ff_get_codec_guid(par->codec_id, ff_codec_wav_guids));
192 } else {
193 58 avio_wl32(pb, par->codec_tag);
194 58 avio_wl32(pb, 0x00100000);
195 58 avio_wl32(pb, 0xAA000080);
196 58 avio_wl32(pb, 0x719B3800);
197 }
198
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 431 } else if ((flags & FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX) ||
199
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 424 par->codec_tag != 0x0001 /* PCM */ ||
200 riff_extradata - riff_extradata_start) {
201 /* WAVEFORMATEX */
202 27 avio_wl16(pb, riff_extradata - riff_extradata_start); /* cbSize */
203 } /* else PCMWAVEFORMAT */
204 489 avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
205 489 hdrsize = avio_tell(pb) - hdrstart;
206
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 489 if (hdrsize & 1) {
207 ✗ hdrsize++;
208 ✗ avio_w8(pb, 0);
209 }
210
211 489 return hdrsize;
212 }
213
214 /* BITMAPINFOHEADER header */
215 313 void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par,
216 int for_asf, int ignore_extradata, int rgb_frame_is_flipped)
217 {
218
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 399 int flipped_extradata = (par->extradata_size >= 9 &&
219
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 86 !memcmp(par->extradata + par->extradata_size - 9, "BottomUp", 9));
220
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 313 int keep_height = flipped_extradata || rgb_frame_is_flipped;
221 313 int extradata_size = par->extradata_size - 9*flipped_extradata;
222 313 enum AVPixelFormat pix_fmt = par->format;
223 int pal_avi;
224
225
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 313 if (pix_fmt == AV_PIX_FMT_NONE && par->bits_per_coded_sample == 1)
226 ✗ pix_fmt = AV_PIX_FMT_MONOWHITE;
227
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 619 pal_avi = !for_asf &&
228
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 306 (pix_fmt == AV_PIX_FMT_PAL8 ||
229
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 302 pix_fmt == AV_PIX_FMT_MONOWHITE ||
230 pix_fmt == AV_PIX_FMT_MONOBLACK);
231
232 /* Size (not including the size of the color table or color masks) */
233
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 313 avio_wl32(pb, 40 + (ignore_extradata || pal_avi ? 0 : extradata_size));
234 313 avio_wl32(pb, par->width);
235 //We always store RGB TopDown
236
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 313 avio_wl32(pb, par->codec_tag || keep_height ? par->height : -par->height);
237 /* planes */
238 313 avio_wl16(pb, 1);
239 /* depth */
240
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 313 avio_wl16(pb, par->bits_per_coded_sample ? par->bits_per_coded_sample : 24);
241 /* compression type */
242 // MSRLE compatibility with Media Player 3.1 and Windows 95
243
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 313 avio_wl32(pb, par->codec_id == AV_CODEC_ID_MSRLE ? 1 : par->codec_tag);
244
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 313 avio_wl32(pb, (par->width * par->height * (par->bits_per_coded_sample ? par->bits_per_coded_sample : 24)+7) / 8);
245 313 avio_wl32(pb, 0);
246 313 avio_wl32(pb, 0);
247 /* Number of color indices in the color table that are used.
248 * A value of 0 means 2^biBitCount indices, but this doesn't work
249 * with Windows Media Player and files containing xxpc chunks. */
250 // MSRLE on Windows 95 requires a zero here
251
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 313 avio_wl32(pb, pal_avi && par->codec_id != AV_CODEC_ID_MSRLE ? 1 << par->bits_per_coded_sample : 0);
252 313 avio_wl32(pb, 0);
253
254
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 313 if (!ignore_extradata) {
255
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 311 if (par->extradata_size) {
256 102 avio_write(pb, par->extradata, extradata_size);
257
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 102 if (!for_asf && extradata_size & 1)
258 18 avio_w8(pb, 0);
259
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 209 } else if (pal_avi) {
260 int i;
261
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 1040 for (i = 0; i < 1 << par->bits_per_coded_sample; i++) {
262 /* Initialize 1 bpp palette to black & white */
263
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 1032 if (i == 0 && pix_fmt == AV_PIX_FMT_MONOWHITE)
264 4 avio_wl32(pb, 0xffffff);
265
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 1028 else if (i == 1 && pix_fmt == AV_PIX_FMT_MONOBLACK)
266 ✗ avio_wl32(pb, 0xffffff);
267 else
268 1028 avio_wl32(pb, 0);
269 }
270 }
271 }
272 313 }
273
274 3300 void ff_parse_specific_params(AVStream *st, int *au_rate,
275 int *au_ssize, int *au_scale)
276 {
277 3300 AVCodecParameters *par = st->codecpar;
278 int gcd;
279 int audio_frame_size;
280
281 3300 audio_frame_size = av_get_audio_frame_duration2(par, 0);
282
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 3300 if (!audio_frame_size)
283 3295 audio_frame_size = par->frame_size;
284
285 3300 *au_ssize = par->block_align;
286
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 3300 if (audio_frame_size && par->sample_rate) {
287 5 *au_scale = audio_frame_size;
288 5 *au_rate = par->sample_rate;
289
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 3295 } else if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
290
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 15 par->codec_type == AVMEDIA_TYPE_DATA ||
291
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 15 par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
292 3280 *au_scale = st->time_base.num;
293 3280 *au_rate = st->time_base.den;
294 } else {
295
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 15 *au_scale = par->block_align ? par->block_align * 8 : 8;
296
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 15 *au_rate = par->bit_rate ? par->bit_rate :
297 ✗ 8 * par->sample_rate;
298 }
299 3300 gcd = av_gcd(*au_scale, *au_rate);
300 3300 *au_scale /= gcd;
301 3300 *au_rate /= gcd;
302 3300 }
303
304 329 void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
305 {
306 329 size_t len = strlen(str);
307
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 329 if (len > 0 && len < UINT32_MAX) {
308 329 len++;
309 329 ffio_wfourcc(pb, tag);
310 329 avio_wl32(pb, len);
311 329 avio_put_str(pb, str);
312
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 329 if (len & 1)
313 328 avio_w8(pb, 0);
314 }
315 329 }
316
317 static const char riff_tags[][5] = {
318 "IARL", "IART", "IAS1", "IAS2", "IAS3", "IAS4", "IAS5", "IAS6", "IAS7",
319 "IAS8", "IAS9", "ICMS", "ICMT", "ICOP", "ICRD", "ICRP", "IDIM", "IDPI",
320 "IENG", "IGNR", "IKEY", "ILGT", "ILNG", "IMED", "INAM", "IPLT", "IPRD",
321 "IPRT", "ITRK", "ISBJ", "ISFT", "ISHP", "ISMP", "ISRC", "ISRF", "ITCH",
322 { 0 }
323 };
324
325 781 static int riff_has_valid_tags(AVFormatContext *s)
326 {
327 int i;
328
329
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 26875 for (i = 0; *riff_tags[i]; i++)
330
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 26423 if (av_dict_get(s->metadata, riff_tags[i], NULL, AV_DICT_MATCH_CASE))
331 329 return 1;
332
333 452 return 0;
334 }
335
336 781 void ff_riff_write_info(AVFormatContext *s)
337 {
338 781 AVIOContext *pb = s->pb;
339 int i;
340 int64_t list_pos;
341 781 AVDictionaryEntry *t = NULL;
342
343 781 ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL);
344
345 /* writing empty LIST is not nice and may cause problems */
346
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 781 if (!riff_has_valid_tags(s))
347 452 return;
348
349 329 list_pos = ff_start_tag(pb, "LIST");
350 329 ffio_wfourcc(pb, "INFO");
351
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 12173 for (i = 0; *riff_tags[i]; i++)
352
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 11844 if ((t = av_dict_get(s->metadata, riff_tags[i],
353 NULL, AV_DICT_MATCH_CASE)))
354 329 ff_riff_write_info_tag(s->pb, t->key, t->value);
355 329 ff_end_tag(pb, list_pos);
356 }
357
358 258 void ff_put_guid(AVIOContext *s, const ff_asf_guid *g)
359 {
360 av_assert0(sizeof(*g) == 16);
361 258 avio_write(s, *g, sizeof(*g));
362 258 }
363
364 4 const ff_asf_guid *ff_get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid)
365 {
366 int i;
367
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 12 for (i = 0; av_guid[i].id != AV_CODEC_ID_NONE; i++) {
368
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 12 if (id == av_guid[i].id)
369 4 return &(av_guid[i].guid);
370 }
371 ✗ return NULL;
372 }
373