Statistics
| Branch: | Revision:

ffmpeg / libavfilter / defaults.c @ 34017fd9

History | View | Annotate | Download (10.6 KB)

1 bf4ce7a3 Vitor Sessak
/*
2
 * Filter layer - default implementations
3
 * copyright (c) 2007 Bobby Bingham
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 7be5b730 Stefano Sabatini
#include "libavcore/imgutils.h"
23 ad2c9501 S.N. Hemanth Meenakshisundaram
#include "libavcodec/audioconvert.h"
24 bf4ce7a3 Vitor Sessak
#include "avfilter.h"
25
26
/* TODO: buffer pool.  see comment for avfilter_default_get_video_buffer() */
27 f0d77b20 S.N. Hemanth Meenakshisundaram
static void avfilter_default_free_buffer(AVFilterBuffer *ptr)
28 bf4ce7a3 Vitor Sessak
{
29 f0d77b20 S.N. Hemanth Meenakshisundaram
    av_free(ptr->data[0]);
30
    av_free(ptr);
31 bf4ce7a3 Vitor Sessak
}
32
33
/* TODO: set the buffer's priv member to a context structure for the whole
34
 * filter chain.  This will allow for a buffer pool instead of the constant
35
 * alloc & free cycle currently implemented. */
36 ecc8dada S.N. Hemanth Meenakshisundaram
AVFilterBufferRef *avfilter_default_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
37 bf4ce7a3 Vitor Sessak
{
38 f0d77b20 S.N. Hemanth Meenakshisundaram
    AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer));
39 65d4cab5 Stefano Sabatini
    AVFilterBufferRef *ref = NULL;
40 790a03d7 Vitor Sessak
    int i, tempsize;
41 65d4cab5 Stefano Sabatini
    char *buf = NULL;
42
43
    if (!pic || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
44
        goto fail;
45 bf4ce7a3 Vitor Sessak
46 cc80caff S.N. Hemanth Meenakshisundaram
    ref->buf         = pic;
47
    ref->video       = av_mallocz(sizeof(AVFilterBufferRefVideoProps));
48
    ref->video->w    = w;
49
    ref->video->h    = h;
50 4f909565 Vitor Sessak
51
    /* make sure the buffer gets read permission or it's useless for output */
52
    ref->perms = perms | AV_PERM_READ;
53 bf4ce7a3 Vitor Sessak
54
    pic->refcount = 1;
55 d54e0948 S.N. Hemanth Meenakshisundaram
    ref->format   = link->format;
56 f0d77b20 S.N. Hemanth Meenakshisundaram
    pic->free     = avfilter_default_free_buffer;
57 e16f217c Stefano Sabatini
    av_image_fill_linesizes(pic->linesize, ref->format, ref->video->w);
58 790a03d7 Vitor Sessak
59 371cbff8 Stefano Sabatini
    for (i = 0; i < 4; i++)
60 ef516f73 David Conrad
        pic->linesize[i] = FFALIGN(pic->linesize[i], 16);
61 790a03d7 Vitor Sessak
62 e16f217c Stefano Sabatini
    tempsize = av_image_fill_pointers(pic->data, ref->format, ref->video->h, NULL, pic->linesize);
63 8ad802e6 Vitor Sessak
    buf = av_malloc(tempsize + 16); // +2 is needed for swscaler, +16 to be
64
                                    // SIMD-friendly
65 65d4cab5 Stefano Sabatini
    if (!buf)
66
        goto fail;
67 e16f217c Stefano Sabatini
    av_image_fill_pointers(pic->data, ref->format, ref->video->h, buf, pic->linesize);
68 bf4ce7a3 Vitor Sessak
69 c1db7bff S.N. Hemanth Meenakshisundaram
    memcpy(ref->data,     pic->data,     sizeof(ref->data));
70
    memcpy(ref->linesize, pic->linesize, sizeof(ref->linesize));
71 bf4ce7a3 Vitor Sessak
72
    return ref;
73 65d4cab5 Stefano Sabatini
74
fail:
75
    av_free(buf);
76
    if (ref && ref->video)
77
        av_free(ref->video);
78
    av_free(ref);
79
    av_free(pic);
80
    return NULL;
81 bf4ce7a3 Vitor Sessak
}
82
83 ad2c9501 S.N. Hemanth Meenakshisundaram
AVFilterBufferRef *avfilter_default_get_audio_buffer(AVFilterLink *link, int perms,
84
                                                     enum SampleFormat sample_fmt, int size,
85
                                                     int64_t channel_layout, int planar)
86
{
87
    AVFilterBuffer *samples = av_mallocz(sizeof(AVFilterBuffer));
88
    AVFilterBufferRef *ref = NULL;
89
    int i, sample_size, chans_nb, bufsize, per_channel_size, step_size = 0;
90
    char *buf;
91
92
    if (!samples || !(ref = av_mallocz(sizeof(AVFilterBufferRef))))
93
        goto fail;
94
95
    ref->buf                   = samples;
96
    ref->format                = sample_fmt;
97
98
    ref->audio = av_mallocz(sizeof(AVFilterBufferRefAudioProps));
99
    if (!ref->audio)
100
        goto fail;
101
102
    ref->audio->channel_layout = channel_layout;
103
    ref->audio->size           = size;
104
    ref->audio->planar         = planar;
105
106
    /* make sure the buffer gets read permission or it's useless for output */
107
    ref->perms = perms | AV_PERM_READ;
108
109
    samples->refcount   = 1;
110
    samples->free       = avfilter_default_free_buffer;
111
112
    sample_size = av_get_bits_per_sample_format(sample_fmt) >>3;
113
    chans_nb = avcodec_channel_layout_num_channels(channel_layout);
114
115
    per_channel_size = size/chans_nb;
116
    ref->audio->samples_nb = per_channel_size/sample_size;
117
118
    /* Set the number of bytes to traverse to reach next sample of a particular channel:
119
     * For planar, this is simply the sample size.
120
     * For packed, this is the number of samples * sample_size.
121
     */
122
    for (i = 0; i < chans_nb; i++)
123
        samples->linesize[i] = planar > 0 ? per_channel_size : sample_size;
124
    memset(&samples->linesize[chans_nb], 0, (8-chans_nb) * sizeof(samples->linesize[0]));
125
126
    /* Calculate total buffer size, round to multiple of 16 to be SIMD friendly */
127
    bufsize = (size + 15)&~15;
128
    buf = av_malloc(bufsize);
129
    if (!buf)
130
        goto fail;
131
132
    /* For planar, set the start point of each channel's data within the buffer
133
     * For packed, set the start point of the entire buffer only
134
     */
135
    samples->data[0] = buf;
136
    if (buf && planar) {
137
        for (i = 1; i < chans_nb; i++) {
138
            step_size += per_channel_size;
139
            samples->data[i] = buf + step_size;
140
        }
141
    } else {
142
        for (i = 1; i < chans_nb; i++)
143
            samples->data[i] = buf;
144
    }
145
146
    memset(&samples->data[chans_nb], 0, (8-chans_nb) * sizeof(samples->data[0]));
147
148
    memcpy(ref->data,     samples->data,     sizeof(ref->data));
149
    memcpy(ref->linesize, samples->linesize, sizeof(ref->linesize));
150
151
    return ref;
152
153
fail:
154
    av_free(buf);
155
    if (ref && ref->audio)
156
        av_free(ref->audio);
157
    av_free(ref);
158
    av_free(samples);
159
    return NULL;
160
}
161
162 ecc8dada S.N. Hemanth Meenakshisundaram
void avfilter_default_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
163 bf4ce7a3 Vitor Sessak
{
164
    AVFilterLink *out = NULL;
165
166 371cbff8 Stefano Sabatini
    if (link->dst->output_count)
167 bf4ce7a3 Vitor Sessak
        out = link->dst->outputs[0];
168
169 371cbff8 Stefano Sabatini
    if (out) {
170 5d4890d7 S.N. Hemanth Meenakshisundaram
        out->out_buf      = avfilter_get_video_buffer(out, AV_PERM_WRITE, out->w, out->h);
171
        avfilter_copy_buffer_ref_props(out->out_buf, picref);
172
        avfilter_start_frame(out, avfilter_ref_buffer(out->out_buf, ~0));
173 bf4ce7a3 Vitor Sessak
    }
174
}
175
176 a13a5437 Stefano Sabatini
void avfilter_default_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
177 b9609848 Stefano Sabatini
{
178
    AVFilterLink *out = NULL;
179
180 371cbff8 Stefano Sabatini
    if (link->dst->output_count)
181 b9609848 Stefano Sabatini
        out = link->dst->outputs[0];
182
183 371cbff8 Stefano Sabatini
    if (out)
184 a13a5437 Stefano Sabatini
        avfilter_draw_slice(out, y, h, slice_dir);
185 b9609848 Stefano Sabatini
}
186
187 bf4ce7a3 Vitor Sessak
void avfilter_default_end_frame(AVFilterLink *link)
188
{
189
    AVFilterLink *out = NULL;
190
191 371cbff8 Stefano Sabatini
    if (link->dst->output_count)
192 bf4ce7a3 Vitor Sessak
        out = link->dst->outputs[0];
193
194 5d4890d7 S.N. Hemanth Meenakshisundaram
    avfilter_unref_buffer(link->cur_buf);
195
    link->cur_buf = NULL;
196 bf4ce7a3 Vitor Sessak
197 371cbff8 Stefano Sabatini
    if (out) {
198
        if (out->out_buf) {
199 5d4890d7 S.N. Hemanth Meenakshisundaram
            avfilter_unref_buffer(out->out_buf);
200
            out->out_buf = NULL;
201 552c0208 Vitor Sessak
        }
202 bf4ce7a3 Vitor Sessak
        avfilter_end_frame(out);
203
    }
204
}
205
206 ad2c9501 S.N. Hemanth Meenakshisundaram
/* FIXME: samplesref is same as link->cur_buf. Need to consider removing the redundant parameter. */
207
void avfilter_default_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
208
{
209
    AVFilterLink *outlink = NULL;
210
211
    if (link->dst->output_count)
212
        outlink = link->dst->outputs[0];
213
214
    if (outlink) {
215
        outlink->out_buf = avfilter_default_get_audio_buffer(link, AV_PERM_WRITE, samplesref->format,
216
                                                             samplesref->audio->size,
217
                                                             samplesref->audio->channel_layout,
218
                                                             samplesref->audio->planar);
219
        outlink->out_buf->pts                = samplesref->pts;
220
        outlink->out_buf->audio->sample_rate = samplesref->audio->sample_rate;
221
        avfilter_filter_samples(outlink, avfilter_ref_buffer(outlink->out_buf, ~0));
222
        avfilter_unref_buffer(outlink->out_buf);
223
        outlink->out_buf = NULL;
224
    }
225
    avfilter_unref_buffer(samplesref);
226
    link->cur_buf = NULL;
227
}
228
229 bf4ce7a3 Vitor Sessak
/**
230
 * default config_link() implementation for output video links to simplify
231
 * the implementation of one input one output video filters */
232
int avfilter_default_config_output_link(AVFilterLink *link)
233
{
234 371cbff8 Stefano Sabatini
    if (link->src->input_count && link->src->inputs[0]) {
235 ad2c9501 S.N. Hemanth Meenakshisundaram
        if (link->type == AVMEDIA_TYPE_VIDEO) {
236
            link->w = link->src->inputs[0]->w;
237
            link->h = link->src->inputs[0]->h;
238
        } else if (link->type == AVMEDIA_TYPE_AUDIO) {
239
            link->channel_layout = link->src->inputs[0]->channel_layout;
240
            link->sample_rate    = link->src->inputs[0]->sample_rate;
241
        }
242 bf4ce7a3 Vitor Sessak
    } else {
243
        /* XXX: any non-simple filter which would cause this branch to be taken
244
         * really should implement its own config_props() for this link. */
245 d0e4eba5 Vitor Sessak
        return -1;
246 bf4ce7a3 Vitor Sessak
    }
247
248
    return 0;
249
}
250
251
/**
252 e363730c Vitor Sessak
 * A helper for query_formats() which sets all links to the same list of
253
 * formats. If there are no links hooked to this filter, the list of formats is
254
 * freed.
255
 *
256
 * FIXME: this will need changed for filters with a mix of pad types
257
 * (video + audio, etc)
258
 */
259
void avfilter_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
260 bf4ce7a3 Vitor Sessak
{
261 e363730c Vitor Sessak
    int count = 0, i;
262
263 371cbff8 Stefano Sabatini
    for (i = 0; i < ctx->input_count; i++) {
264
        if (ctx->inputs[i]) {
265 e363730c Vitor Sessak
            avfilter_formats_ref(formats, &ctx->inputs[i]->out_formats);
266 371cbff8 Stefano Sabatini
            count++;
267 e363730c Vitor Sessak
        }
268
    }
269 371cbff8 Stefano Sabatini
    for (i = 0; i < ctx->output_count; i++) {
270
        if (ctx->outputs[i]) {
271 e363730c Vitor Sessak
            avfilter_formats_ref(formats, &ctx->outputs[i]->in_formats);
272 371cbff8 Stefano Sabatini
            count++;
273 e363730c Vitor Sessak
        }
274
    }
275
276 371cbff8 Stefano Sabatini
    if (!count) {
277 e363730c Vitor Sessak
        av_free(formats->formats);
278
        av_free(formats->refs);
279
        av_free(formats);
280
    }
281
}
282
283
int avfilter_default_query_formats(AVFilterContext *ctx)
284
{
285 bdab614b S.N. Hemanth Meenakshisundaram
    enum AVMediaType type = ctx->inputs [0] ? ctx->inputs [0]->type :
286
                            ctx->outputs[0] ? ctx->outputs[0]->type :
287
                            AVMEDIA_TYPE_VIDEO;
288
289
    avfilter_set_common_formats(ctx, avfilter_all_formats(type));
290 e363730c Vitor Sessak
    return 0;
291 bf4ce7a3 Vitor Sessak
}
292
293 ecc8dada S.N. Hemanth Meenakshisundaram
void avfilter_null_start_frame(AVFilterLink *link, AVFilterBufferRef *picref)
294 91d1c741 Bobby Bingham
{
295
    avfilter_start_frame(link->dst->outputs[0], picref);
296
}
297
298
void avfilter_null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir)
299
{
300
    avfilter_draw_slice(link->dst->outputs[0], y, h, slice_dir);
301
}
302
303
void avfilter_null_end_frame(AVFilterLink *link)
304
{
305
    avfilter_end_frame(link->dst->outputs[0]);
306
}
307
308 ad2c9501 S.N. Hemanth Meenakshisundaram
void avfilter_null_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
309
{
310
    avfilter_filter_samples(link->dst->outputs[0], samplesref);
311
}
312
313 ecc8dada S.N. Hemanth Meenakshisundaram
AVFilterBufferRef *avfilter_null_get_video_buffer(AVFilterLink *link, int perms, int w, int h)
314 91d1c741 Bobby Bingham
{
315
    return avfilter_get_video_buffer(link->dst->outputs[0], perms, w, h);
316
}
317
318 ad2c9501 S.N. Hemanth Meenakshisundaram
AVFilterBufferRef *avfilter_null_get_audio_buffer(AVFilterLink *link, int perms,
319
                                                  enum SampleFormat sample_fmt, int size,
320
                                                  int64_t channel_layout, int packed)
321
{
322
    return avfilter_get_audio_buffer(link->dst->outputs[0], perms, sample_fmt,
323
                                     size, channel_layout, packed);
324
}