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path: root/libavformat/yuv4mpegenc.c (plain)
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1/*
2 * YUV4MPEG muxer
3 * Copyright (c) 2001, 2002, 2003 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/pixdesc.h"
23#include "avformat.h"
24#include "internal.h"
25#include "yuv4mpeg.h"
26
27#define Y4M_LINE_MAX 256
28
29static int yuv4_generate_header(AVFormatContext *s, char* buf)
30{
31 AVStream *st;
32 int width, height;
33 int raten, rated, aspectn, aspectd, n;
34 char inter;
35 const char *colorspace = "";
36 int field_order;
37
38 st = s->streams[0];
39 width = st->codecpar->width;
40 height = st->codecpar->height;
41 field_order = st->codecpar->field_order;
42
43 // TODO: should be avg_frame_rate
44 av_reduce(&raten, &rated, st->time_base.den,
45 st->time_base.num, (1UL << 31) - 1);
46
47 aspectn = st->sample_aspect_ratio.num;
48 aspectd = st->sample_aspect_ratio.den;
49
50 if (aspectn == 0 && aspectd == 1)
51 aspectd = 0; // 0:0 means unknown
52
53#if FF_API_LAVF_AVCTX
54 FF_DISABLE_DEPRECATION_WARNINGS
55 if (field_order != st->codec->field_order && st->codec->field_order != AV_FIELD_UNKNOWN)
56 field_order = st->codec->field_order;
57 FF_ENABLE_DEPRECATION_WARNINGS
58#endif
59
60 switch (field_order) {
61 case AV_FIELD_TB:
62 case AV_FIELD_TT: inter = 't'; break;
63 case AV_FIELD_BT:
64 case AV_FIELD_BB: inter = 'b'; break;
65 default: inter = 'p'; break;
66 }
67
68 switch (st->codecpar->format) {
69 case AV_PIX_FMT_GRAY8:
70 colorspace = " Cmono";
71 break;
72 case AV_PIX_FMT_GRAY16:
73 colorspace = " Cmono16";
74 break;
75 case AV_PIX_FMT_YUV411P:
76 colorspace = " C411 XYSCSS=411";
77 break;
78 case AV_PIX_FMT_YUV420P:
79 switch (st->codecpar->chroma_location) {
80 case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
81 case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
82 default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
83 }
84 break;
85 case AV_PIX_FMT_YUV422P:
86 colorspace = " C422 XYSCSS=422";
87 break;
88 case AV_PIX_FMT_YUV444P:
89 colorspace = " C444 XYSCSS=444";
90 break;
91 case AV_PIX_FMT_YUV420P9:
92 colorspace = " C420p9 XYSCSS=420P9";
93 break;
94 case AV_PIX_FMT_YUV422P9:
95 colorspace = " C422p9 XYSCSS=422P9";
96 break;
97 case AV_PIX_FMT_YUV444P9:
98 colorspace = " C444p9 XYSCSS=444P9";
99 break;
100 case AV_PIX_FMT_YUV420P10:
101 colorspace = " C420p10 XYSCSS=420P10";
102 break;
103 case AV_PIX_FMT_YUV422P10:
104 colorspace = " C422p10 XYSCSS=422P10";
105 break;
106 case AV_PIX_FMT_YUV444P10:
107 colorspace = " C444p10 XYSCSS=444P10";
108 break;
109 case AV_PIX_FMT_YUV420P12:
110 colorspace = " C420p12 XYSCSS=420P12";
111 break;
112 case AV_PIX_FMT_YUV422P12:
113 colorspace = " C422p12 XYSCSS=422P12";
114 break;
115 case AV_PIX_FMT_YUV444P12:
116 colorspace = " C444p12 XYSCSS=444P12";
117 break;
118 case AV_PIX_FMT_YUV420P14:
119 colorspace = " C420p14 XYSCSS=420P14";
120 break;
121 case AV_PIX_FMT_YUV422P14:
122 colorspace = " C422p14 XYSCSS=422P14";
123 break;
124 case AV_PIX_FMT_YUV444P14:
125 colorspace = " C444p14 XYSCSS=444P14";
126 break;
127 case AV_PIX_FMT_YUV420P16:
128 colorspace = " C420p16 XYSCSS=420P16";
129 break;
130 case AV_PIX_FMT_YUV422P16:
131 colorspace = " C422p16 XYSCSS=422P16";
132 break;
133 case AV_PIX_FMT_YUV444P16:
134 colorspace = " C444p16 XYSCSS=444P16";
135 break;
136 }
137
138 /* construct stream header, if this is the first frame */
139 n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
140 Y4M_MAGIC, width, height, raten, rated, inter,
141 aspectn, aspectd, colorspace);
142
143 return n;
144}
145
146static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
147{
148 AVStream *st = s->streams[pkt->stream_index];
149 AVIOContext *pb = s->pb;
150 AVFrame *frame;
151 int* first_pkt = s->priv_data;
152 int width, height, h_chroma_shift, v_chroma_shift;
153 int i;
154 char buf2[Y4M_LINE_MAX + 1];
155 uint8_t *ptr, *ptr1, *ptr2;
156
157 frame = (AVFrame *)pkt->data;
158
159 /* for the first packet we have to output the header as well */
160 if (*first_pkt) {
161 *first_pkt = 0;
162 if (yuv4_generate_header(s, buf2) < 0) {
163 av_log(s, AV_LOG_ERROR,
164 "Error. YUV4MPEG stream header write failed.\n");
165 return AVERROR(EIO);
166 } else {
167 avio_write(pb, buf2, strlen(buf2));
168 }
169 }
170
171 /* construct frame header */
172
173 avio_printf(s->pb, "%s\n", Y4M_FRAME_MAGIC);
174
175 width = st->codecpar->width;
176 height = st->codecpar->height;
177
178 ptr = frame->data[0];
179
180 switch (st->codecpar->format) {
181 case AV_PIX_FMT_GRAY8:
182 case AV_PIX_FMT_YUV411P:
183 case AV_PIX_FMT_YUV420P:
184 case AV_PIX_FMT_YUV422P:
185 case AV_PIX_FMT_YUV444P:
186 break;
187 case AV_PIX_FMT_GRAY16:
188 case AV_PIX_FMT_YUV420P9:
189 case AV_PIX_FMT_YUV422P9:
190 case AV_PIX_FMT_YUV444P9:
191 case AV_PIX_FMT_YUV420P10:
192 case AV_PIX_FMT_YUV422P10:
193 case AV_PIX_FMT_YUV444P10:
194 case AV_PIX_FMT_YUV420P12:
195 case AV_PIX_FMT_YUV422P12:
196 case AV_PIX_FMT_YUV444P12:
197 case AV_PIX_FMT_YUV420P14:
198 case AV_PIX_FMT_YUV422P14:
199 case AV_PIX_FMT_YUV444P14:
200 case AV_PIX_FMT_YUV420P16:
201 case AV_PIX_FMT_YUV422P16:
202 case AV_PIX_FMT_YUV444P16:
203 width *= 2;
204 break;
205 default:
206 av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
207 av_get_pix_fmt_name(st->codecpar->format));
208 return AVERROR(EINVAL);
209 }
210
211 for (i = 0; i < height; i++) {
212 avio_write(pb, ptr, width);
213 ptr += frame->linesize[0];
214 }
215
216 if (st->codecpar->format != AV_PIX_FMT_GRAY8 &&
217 st->codecpar->format != AV_PIX_FMT_GRAY16) {
218 // Adjust for smaller Cb and Cr planes
219 av_pix_fmt_get_chroma_sub_sample(st->codecpar->format, &h_chroma_shift,
220 &v_chroma_shift);
221 // Shift right, rounding up
222 width = AV_CEIL_RSHIFT(width, h_chroma_shift);
223 height = AV_CEIL_RSHIFT(height, v_chroma_shift);
224
225 ptr1 = frame->data[1];
226 ptr2 = frame->data[2];
227 for (i = 0; i < height; i++) { /* Cb */
228 avio_write(pb, ptr1, width);
229 ptr1 += frame->linesize[1];
230 }
231 for (i = 0; i < height; i++) { /* Cr */
232 avio_write(pb, ptr2, width);
233 ptr2 += frame->linesize[2];
234 }
235 }
236
237 return 0;
238}
239
240static int yuv4_write_header(AVFormatContext *s)
241{
242 int *first_pkt = s->priv_data;
243
244 if (s->nb_streams != 1)
245 return AVERROR(EIO);
246
247 if (s->streams[0]->codecpar->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME) {
248 av_log(s, AV_LOG_ERROR, "ERROR: Codec not supported.\n");
249 return AVERROR_INVALIDDATA;
250 }
251
252 switch (s->streams[0]->codecpar->format) {
253 case AV_PIX_FMT_YUV411P:
254 av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
255 "stream, some mjpegtools might not work.\n");
256 break;
257 case AV_PIX_FMT_GRAY8:
258 case AV_PIX_FMT_GRAY16:
259 case AV_PIX_FMT_YUV420P:
260 case AV_PIX_FMT_YUV422P:
261 case AV_PIX_FMT_YUV444P:
262 break;
263 case AV_PIX_FMT_YUV420P9:
264 case AV_PIX_FMT_YUV422P9:
265 case AV_PIX_FMT_YUV444P9:
266 case AV_PIX_FMT_YUV420P10:
267 case AV_PIX_FMT_YUV422P10:
268 case AV_PIX_FMT_YUV444P10:
269 case AV_PIX_FMT_YUV420P12:
270 case AV_PIX_FMT_YUV422P12:
271 case AV_PIX_FMT_YUV444P12:
272 case AV_PIX_FMT_YUV420P14:
273 case AV_PIX_FMT_YUV422P14:
274 case AV_PIX_FMT_YUV444P14:
275 case AV_PIX_FMT_YUV420P16:
276 case AV_PIX_FMT_YUV422P16:
277 case AV_PIX_FMT_YUV444P16:
278 if (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
279 av_log(s, AV_LOG_ERROR, "'%s' is not an official yuv4mpegpipe pixel format. "
280 "Use '-strict -1' to encode to this pixel format.\n",
281 av_get_pix_fmt_name(s->streams[0]->codecpar->format));
282 return AVERROR(EINVAL);
283 }
284 av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
285 "Mjpegtools will not work.\n");
286 break;
287 default:
288 av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
289 "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
290 "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
291 "yuv444p10, yuv422p10, yuv420p10, "
292 "yuv444p12, yuv422p12, yuv420p12, "
293 "yuv444p14, yuv422p14, yuv420p14, "
294 "yuv444p16, yuv422p16, yuv420p16 "
295 "and gray16 pixel formats. "
296 "Use -pix_fmt to select one.\n");
297 return AVERROR(EIO);
298 }
299
300 *first_pkt = 1;
301 return 0;
302}
303
304AVOutputFormat ff_yuv4mpegpipe_muxer = {
305 .name = "yuv4mpegpipe",
306 .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
307 .extensions = "y4m",
308 .priv_data_size = sizeof(int),
309 .audio_codec = AV_CODEC_ID_NONE,
310 .video_codec = AV_CODEC_ID_WRAPPED_AVFRAME,
311 .write_header = yuv4_write_header,
312 .write_packet = yuv4_write_packet,
313};
314
generated by cgit at 2024-05-17 01:48:51 (GMT)