aboutsummaryrefslogtreecommitdiffstats
path: root/libavformat/img.c
blob: d52e1a0f59e6f52b3d9367e09a74c8314eb0b45b (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
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
/*
 * Image format
 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
 *
 * This library 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 of the License, or (at your option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "avformat.h"

/* XXX: this is a hack */
int loop_input = 0;

typedef struct {
    int width;
    int height;
    int img_first;
    int img_last;
    int img_number;
    int img_count;
    int img_size;
    AVImageFormat *img_fmt;
    int pix_fmt;
    int is_pipe;
    char path[1024];
    /* temporary usage */
    void *ptr;
} VideoData;


/* return -1 if no image found */
static int find_image_range(int *pfirst_index, int *plast_index, 
                            const char *path)
{
    char buf[1024];
    int range, last_index, range1, first_index;

    /* find the first image */
    for(first_index = 0; first_index < 5; first_index++) {
        if (get_frame_filename(buf, sizeof(buf), path, first_index) < 0)
            goto fail;
        if (url_exist(buf))
            break;
    }
    if (first_index == 5)
        goto fail;
    
    /* find the last image */
    last_index = first_index;
    for(;;) {
        range = 0;
        for(;;) {
            if (!range)
                range1 = 1;
            else
                range1 = 2 * range;
            if (get_frame_filename(buf, sizeof(buf), path, 
                                   last_index + range1) < 0)
                goto fail;
            if (!url_exist(buf))
                break;
            range = range1;
            /* just in case... */
            if (range >= (1 << 30))
                goto fail;
        }
        /* we are sure than image last_index + range exists */
        if (!range)
            break;
        last_index += range;
    }
    *pfirst_index = first_index;
    *plast_index = last_index;
    return 0;
 fail:
    return -1;
}


static int image_probe(AVProbeData *p)
{
    if (filename_number_test(p->filename) >= 0 && guess_image_format(p->filename))
        return AVPROBE_SCORE_MAX-1;
    else
        return 0;
}

static int read_header_alloc_cb(void *opaque, AVImageInfo *info)
{
    VideoData *s = opaque;

    s->width = info->width;
    s->height = info->height;
    s->pix_fmt = info->pix_fmt;
    /* stop image reading but no error */
    return 1;
}

static int img_read_header(AVFormatContext *s1, AVFormatParameters *ap)
{
    VideoData *s = s1->priv_data;
    int ret, first_index, last_index;
    char buf[1024];
    ByteIOContext pb1, *f = &pb1;
    AVStream *st;

    st = av_new_stream(s1, 0);
    if (!st) {
        av_free(s);
        return -ENOMEM;
    }

    if (ap && ap->image_format)
        s->img_fmt = ap->image_format;

    pstrcpy(s->path, sizeof(s->path), s1->filename);
    s->img_number = 0;
    s->img_count = 0;
    
    /* find format */
    if (s1->iformat->flags & AVFMT_NOFILE)
        s->is_pipe = 0;
    else
        s->is_pipe = 1;
        
    if (!ap || !ap->frame_rate) {
        st->codec.frame_rate      = 25;
        st->codec.frame_rate_base = 1;
    } else {
        st->codec.frame_rate      = ap->frame_rate;
        st->codec.frame_rate_base = ap->frame_rate_base;
    }
    
    if (!s->is_pipe) {
        if (find_image_range(&first_index, &last_index, s->path) < 0)
            goto fail;
        s->img_first = first_index;
        s->img_last = last_index;
        s->img_number = first_index;
        /* compute duration */
        st->start_time = 0;
        st->duration = ((int64_t)AV_TIME_BASE * 
                        (last_index - first_index + 1) * 
                        st->codec.frame_rate_base) / st->codec.frame_rate;
        if (get_frame_filename(buf, sizeof(buf), s->path, s->img_number) < 0)
            goto fail;
        if (url_fopen(f, buf, URL_RDONLY) < 0)
            goto fail;
    } else {
        f = &s1->pb;
    }
    
    ret = av_read_image(f, s1->filename, s->img_fmt, read_header_alloc_cb, s);
    if (ret < 0)
        goto fail1;

    if (!s->is_pipe) {
        url_fclose(f);
    } else {
        url_fseek(f, 0, SEEK_SET);
    }
    
    st->codec.codec_type = CODEC_TYPE_VIDEO;
    st->codec.codec_id = CODEC_ID_RAWVIDEO;
    st->codec.width = s->width;
    st->codec.height = s->height;
    st->codec.pix_fmt = s->pix_fmt;
    s->img_size = avpicture_get_size(s->pix_fmt, (s->width+15)&(~15), (s->height+15)&(~15));

    return 0;
 fail1:
    if (!s->is_pipe)
        url_fclose(f);
 fail:
    av_free(s);
    return AVERROR_IO;
}

static int read_packet_alloc_cb(void *opaque, AVImageInfo *info)
{
    VideoData *s = opaque;

    if (info->width != s->width ||
        info->height != s->height)
        return -1;
    avpicture_fill(&info->pict, s->ptr, info->pix_fmt, (info->width+15)&(~15), (info->height+15)&(~15));
    return 0;
}

static int img_read_packet(AVFormatContext *s1, AVPacket *pkt)
{
    VideoData *s = s1->priv_data;
    char filename[1024];
    int ret;
    ByteIOContext f1, *f;

    if (!s->is_pipe) {
        /* loop over input */
        if (loop_input && s->img_number > s->img_last) {
            s->img_number = s->img_first;
        }
        if (get_frame_filename(filename, sizeof(filename),
                               s->path, s->img_number) < 0)
            return AVERROR_IO;
        f = &f1;
        if (url_fopen(f, filename, URL_RDONLY) < 0)
            return AVERROR_IO;
    } else {
        f = &s1->pb;
        if (url_feof(f))
            return AVERROR_IO;
    }

    av_new_packet(pkt, s->img_size);
    pkt->stream_index = 0;

    s->ptr = pkt->data;
    ret = av_read_image(f, filename, s->img_fmt, read_packet_alloc_cb, s);
    if (!s->is_pipe) {
        url_fclose(f);
    }

    if (ret < 0) {
        av_free_packet(pkt);
        return AVERROR_IO; /* signal EOF */
    } else {
        /* XXX: computing this pts is not necessary as it is done in
           the generic code too */
        pkt->pts = av_rescale((int64_t)s->img_count * s1->streams[0]->codec.frame_rate_base, s1->streams[0]->time_base.den, s1->streams[0]->codec.frame_rate) / s1->streams[0]->time_base.num;
        s->img_count++;
        s->img_number++;
        return 0;
    }
}

static int img_read_close(AVFormatContext *s1)
{
    return 0;
}

/******************************************************/
/* image output */

static int img_set_parameters(AVFormatContext *s, AVFormatParameters *ap)
{
    VideoData *img = s->priv_data;
    AVStream *st;
    AVImageFormat *img_fmt;
    int i;

    /* find output image format */
    if (ap && ap->image_format) {
        img_fmt = ap->image_format;
    } else {
        img_fmt = guess_image_format(s->filename);
    }
    if (!img_fmt)
        return -1;

    if (s->nb_streams != 1)
        return -1;
    
    st = s->streams[0];
    /* we select the first matching format */
    for(i=0;i<PIX_FMT_NB;i++) {
        if (img_fmt->supported_pixel_formats & (1 << i))
            break;
    }
    if (i >= PIX_FMT_NB)
        return -1;
    img->img_fmt = img_fmt;
    img->pix_fmt = i;
    st->codec.pix_fmt = img->pix_fmt;
    return 0;
}

static int img_write_header(AVFormatContext *s)
{
    VideoData *img = s->priv_data;

    img->img_number = 1;
    pstrcpy(img->path, sizeof(img->path), s->filename);

    /* find format */
    if (s->oformat->flags & AVFMT_NOFILE)
        img->is_pipe = 0;
    else
        img->is_pipe = 1;
        
    return 0;
}

static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
{
    VideoData *img = s->priv_data;
    AVStream *st = s->streams[pkt->stream_index];
    ByteIOContext pb1, *pb;
    AVPicture *picture;
    int width, height, ret;
    char filename[1024];
    AVImageInfo info;

    width = st->codec.width;
    height = st->codec.height;
    
    picture = (AVPicture *)pkt->data;

    if (!img->is_pipe) {
        if (get_frame_filename(filename, sizeof(filename), 
                               img->path, img->img_number) < 0)
            return AVERROR_IO;
        pb = &pb1;
        if (url_fopen(pb, filename, URL_WRONLY) < 0)
            return AVERROR_IO;
    } else {
        pb = &s->pb;
    }
    info.width = width;
    info.height = height;
    info.pix_fmt = st->codec.pix_fmt;
    info.interleaved = 0;    /* FIXME: there should be a way to set it right */
    info.pict = *picture;
    ret = av_write_image(pb, img->img_fmt, &info);
    if (!img->is_pipe) {
        url_fclose(pb);
    }

    img->img_number++;
    return 0;
}

static int img_write_trailer(AVFormatContext *s)
{
    return 0;
}

/* input */

static AVInputFormat image_iformat = {
    "image",
    "image sequence",
    sizeof(VideoData),
    image_probe,
    img_read_header,
    img_read_packet,
    img_read_close,
    NULL,
    NULL,
    AVFMT_NOFILE | AVFMT_NEEDNUMBER,
};

static AVInputFormat imagepipe_iformat = {
    "imagepipe",
    "piped image sequence",
    sizeof(VideoData),
    NULL, /* no probe */
    img_read_header,
    img_read_packet,
    img_read_close,
    NULL,
};


/* output */

static AVOutputFormat image_oformat = {
    "image",
    "image sequence",
    "",
    "",
    sizeof(VideoData),
    CODEC_ID_NONE,
    CODEC_ID_RAWVIDEO,
    img_write_header,
    img_write_packet,
    img_write_trailer,
    AVFMT_NOFILE | AVFMT_NEEDNUMBER | AVFMT_RAWPICTURE,
    img_set_parameters,
};

static AVOutputFormat imagepipe_oformat = {
    "imagepipe",
    "piped image sequence",
    "",
    "",
    sizeof(VideoData),
    CODEC_ID_NONE,
    CODEC_ID_RAWVIDEO,
    img_write_header,
    img_write_packet,
    img_write_trailer,
    AVFMT_RAWPICTURE,
    img_set_parameters,
};

int img_init(void)
{
    av_register_input_format(&image_iformat);
    av_register_output_format(&image_oformat);

    av_register_input_format(&imagepipe_iformat);
    av_register_output_format(&imagepipe_oformat);
    
    return 0;
}