aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/yuv4mpegenc.c
blob: 6120c7e520808c012b86e06c8c231a89d89d8f5c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
/*
 * YUV4MPEG muxer
 * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
 *
 * 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 "libavutil/pixdesc.h"
#include "avformat.h"
#include "internal.h"
#include "yuv4mpeg.h"

#define Y4M_LINE_MAX 256

static int yuv4_generate_header(AVFormatContext *s, char* buf)
{
    AVStream *st;
    int width, height;
    int raten, rated, aspectn, aspectd, n;
    char inter;
    const char *colorspace = "";

    st     = s->streams[0];
    width  = st->codec->width;
    height = st->codec->height;

    // TODO: should be avg_frame_rate
    av_reduce(&raten, &rated, st->time_base.den,
              st->time_base.num, (1UL << 31) - 1);

    aspectn = st->sample_aspect_ratio.num;
    aspectd = st->sample_aspect_ratio.den;

    if (aspectn == 0 && aspectd == 1)
        aspectd = 0;  // 0:0 means unknown

    switch (st->codec->field_order) {
    case AV_FIELD_TB:
    case AV_FIELD_TT: inter = 't'; break;
    case AV_FIELD_BT:
    case AV_FIELD_BB: inter = 'b'; break;
    default:          inter = 'p'; break;
    }

    switch (st->codec->pix_fmt) {
    case AV_PIX_FMT_GRAY8:
        colorspace = " Cmono";
        break;
    case AV_PIX_FMT_GRAY16:
        colorspace = " Cmono16";
        break;
    case AV_PIX_FMT_YUV411P:
        colorspace = " C411 XYSCSS=411";
        break;
    case AV_PIX_FMT_YUV420P:
        switch (st->codec->chroma_sample_location) {
        case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
        case AVCHROMA_LOC_LEFT:    colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
        default:                   colorspace = " C420jpeg XYSCSS=420JPEG";   break;
        }
        break;
    case AV_PIX_FMT_YUV422P:
        colorspace = " C422 XYSCSS=422";
        break;
    case AV_PIX_FMT_YUV444P:
        colorspace = " C444 XYSCSS=444";
        break;
    case AV_PIX_FMT_YUV420P9:
        colorspace = " C420p9 XYSCSS=420P9";
        break;
    case AV_PIX_FMT_YUV422P9:
        colorspace = " C422p9 XYSCSS=422P9";
        break;
    case AV_PIX_FMT_YUV444P9:
        colorspace = " C444p9 XYSCSS=444P9";
        break;
    case AV_PIX_FMT_YUV420P10:
        colorspace = " C420p10 XYSCSS=420P10";
        break;
    case AV_PIX_FMT_YUV422P10:
        colorspace = " C422p10 XYSCSS=422P10";
        break;
    case AV_PIX_FMT_YUV444P10:
        colorspace = " C444p10 XYSCSS=444P10";
        break;
    case AV_PIX_FMT_YUV420P12:
        colorspace = " C420p12 XYSCSS=420P12";
        break;
    case AV_PIX_FMT_YUV422P12:
        colorspace = " C422p12 XYSCSS=422P12";
        break;
    case AV_PIX_FMT_YUV444P12:
        colorspace = " C444p12 XYSCSS=444P12";
        break;
    case AV_PIX_FMT_YUV420P14:
        colorspace = " C420p14 XYSCSS=420P14";
        break;
    case AV_PIX_FMT_YUV422P14:
        colorspace = " C422p14 XYSCSS=422P14";
        break;
    case AV_PIX_FMT_YUV444P14:
        colorspace = " C444p14 XYSCSS=444P14";
        break;
    case AV_PIX_FMT_YUV420P16:
        colorspace = " C420p16 XYSCSS=420P16";
        break;
    case AV_PIX_FMT_YUV422P16:
        colorspace = " C422p16 XYSCSS=422P16";
        break;
    case AV_PIX_FMT_YUV444P16:
        colorspace = " C444p16 XYSCSS=444P16";
        break;
    }

    /* construct stream header, if this is the first frame */
    n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
                 Y4M_MAGIC, width, height, raten, rated, inter,
                 aspectn, aspectd, colorspace);

    return n;
}

static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    AVStream *st = s->streams[pkt->stream_index];
    AVIOContext *pb = s->pb;
    AVFrame *frame;
    int* first_pkt = s->priv_data;
    int width, height, h_chroma_shift, v_chroma_shift;
    int i;
    char buf2[Y4M_LINE_MAX + 1];
    uint8_t *ptr, *ptr1, *ptr2;

    frame = (AVFrame *)pkt->data;

    /* for the first packet we have to output the header as well */
    if (*first_pkt) {
        *first_pkt = 0;
        if (yuv4_generate_header(s, buf2) < 0) {
            av_log(s, AV_LOG_ERROR,
                   "Error. YUV4MPEG stream header write failed.\n");
            return AVERROR(EIO);
        } else {
            avio_write(pb, buf2, strlen(buf2));
        }
    }

    /* construct frame header */

    avio_printf(s->pb, "%s\n", Y4M_FRAME_MAGIC);

    width  = st->codec->width;
    height = st->codec->height;

    ptr = frame->data[0];

    switch (st->codec->pix_fmt) {
    case AV_PIX_FMT_GRAY8:
    case AV_PIX_FMT_YUV411P:
    case AV_PIX_FMT_YUV420P:
    case AV_PIX_FMT_YUV422P:
    case AV_PIX_FMT_YUV444P:
        break;
    case AV_PIX_FMT_GRAY16:
    case AV_PIX_FMT_YUV420P9:
    case AV_PIX_FMT_YUV422P9:
    case AV_PIX_FMT_YUV444P9:
    case AV_PIX_FMT_YUV420P10:
    case AV_PIX_FMT_YUV422P10:
    case AV_PIX_FMT_YUV444P10:
    case AV_PIX_FMT_YUV420P12:
    case AV_PIX_FMT_YUV422P12:
    case AV_PIX_FMT_YUV444P12:
    case AV_PIX_FMT_YUV420P14:
    case AV_PIX_FMT_YUV422P14:
    case AV_PIX_FMT_YUV444P14:
    case AV_PIX_FMT_YUV420P16:
    case AV_PIX_FMT_YUV422P16:
    case AV_PIX_FMT_YUV444P16:
        width *= 2;
        break;
    default:
        av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
               av_get_pix_fmt_name(st->codec->pix_fmt));
        return AVERROR(EINVAL);
    }

    for (i = 0; i < height; i++) {
        avio_write(pb, ptr, width);
        ptr += frame->linesize[0];
    }

    if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8 &&
        st->codec->pix_fmt != AV_PIX_FMT_GRAY16) {
        // Adjust for smaller Cb and Cr planes
        av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
                                         &v_chroma_shift);
        width  = AV_CEIL_RSHIFT(width,  h_chroma_shift);
        height = AV_CEIL_RSHIFT(height, v_chroma_shift);

        ptr1 = frame->data[1];
        ptr2 = frame->data[2];
        for (i = 0; i < height; i++) {     /* Cb */
            avio_write(pb, ptr1, width);
            ptr1 += frame->linesize[1];
        }
        for (i = 0; i < height; i++) {     /* Cr */
            avio_write(pb, ptr2, width);
            ptr2 += frame->linesize[2];
        }
    }

    return 0;
}

static int yuv4_write_header(AVFormatContext *s)
{
    int *first_pkt = s->priv_data;

    if (s->nb_streams != 1)
        return AVERROR(EIO);

    if (s->streams[0]->codec->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME) {
        av_log(s, AV_LOG_ERROR, "ERROR: Codec not supported.\n");
        return AVERROR_INVALIDDATA;
    }

    switch (s->streams[0]->codec->pix_fmt) {
    case AV_PIX_FMT_YUV411P:
        av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
               "stream, some mjpegtools might not work.\n");
        break;
    case AV_PIX_FMT_GRAY8:
    case AV_PIX_FMT_GRAY16:
    case AV_PIX_FMT_YUV420P:
    case AV_PIX_FMT_YUV422P:
    case AV_PIX_FMT_YUV444P:
        break;
    case AV_PIX_FMT_YUV420P9:
    case AV_PIX_FMT_YUV422P9:
    case AV_PIX_FMT_YUV444P9:
    case AV_PIX_FMT_YUV420P10:
    case AV_PIX_FMT_YUV422P10:
    case AV_PIX_FMT_YUV444P10:
    case AV_PIX_FMT_YUV420P12:
    case AV_PIX_FMT_YUV422P12:
    case AV_PIX_FMT_YUV444P12:
    case AV_PIX_FMT_YUV420P14:
    case AV_PIX_FMT_YUV422P14:
    case AV_PIX_FMT_YUV444P14:
    case AV_PIX_FMT_YUV420P16:
    case AV_PIX_FMT_YUV422P16:
    case AV_PIX_FMT_YUV444P16:
        if (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
            av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
                   "Use '-strict -1' to encode to this pixel format.\n",
                   av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
            return AVERROR(EINVAL);
        }
        av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
               "Mjpegtools will not work.\n");
        break;
    default:
        av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
               "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
               "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
               "yuv444p10, yuv422p10, yuv420p10, "
               "yuv444p12, yuv422p12, yuv420p12, "
               "yuv444p14, yuv422p14, yuv420p14, "
               "yuv444p16, yuv422p16, yuv420p16 "
               "and gray16 pixel formats. "
               "Use -pix_fmt to select one.\n");
        return AVERROR(EIO);
    }

    *first_pkt = 1;
    return 0;
}

AVOutputFormat ff_yuv4mpegpipe_muxer = {
    .name              = "yuv4mpegpipe",
    .long_name         = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
    .extensions        = "y4m",
    .priv_data_size    = sizeof(int),
    .audio_codec       = AV_CODEC_ID_NONE,
    .video_codec       = AV_CODEC_ID_WRAPPED_AVFRAME,
    .write_header      = yuv4_write_header,
    .write_packet      = yuv4_write_packet,
};