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path: root/libavfilter/buffersink.c (plain)
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1/*
2 * Copyright (c) 2011 Stefano Sabatini
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * buffer sink
24 */
25
26#include "libavutil/avassert.h"
27#include "libavutil/channel_layout.h"
28#include "libavutil/common.h"
29#include "libavutil/internal.h"
30#include "libavutil/opt.h"
31
32#define FF_INTERNAL_FIELDS 1
33#include "framequeue.h"
34
35#include "audio.h"
36#include "avfilter.h"
37#include "buffersink.h"
38#include "filters.h"
39#include "internal.h"
40
41typedef struct BufferSinkContext {
42 const AVClass *class;
43 unsigned warning_limit;
44
45 /* only used for video */
46 enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1
47 int pixel_fmts_size;
48
49 /* only used for audio */
50 enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
51 int sample_fmts_size;
52 int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
53 int channel_layouts_size;
54 int *channel_counts; ///< list of accepted channel counts, terminated by -1
55 int channel_counts_size;
56 int all_channel_counts;
57 int *sample_rates; ///< list of accepted sample rates, terminated by -1
58 int sample_rates_size;
59
60 AVFrame *peeked_frame;
61} BufferSinkContext;
62
63#define NB_ITEMS(list) (list ## _size / sizeof(*list))
64#define FIFO_INIT_SIZE 8
65#define FIFO_INIT_ELEMENT_SIZE sizeof(void *)
66
67int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame)
68{
69 return av_buffersink_get_frame_flags(ctx, frame, 0);
70}
71
72static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
73{
74 if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
75 buf->peeked_frame = in;
76 return out ? av_frame_ref(out, in) : 0;
77 } else {
78 av_assert1(out);
79 buf->peeked_frame = NULL;
80 av_frame_move_ref(out, in);
81 av_frame_free(&in);
82 return 0;
83 }
84}
85
86static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
87{
88 BufferSinkContext *buf = ctx->priv;
89 AVFilterLink *inlink = ctx->inputs[0];
90 int status, ret;
91 AVFrame *cur_frame;
92 int64_t pts;
93
94 if (buf->peeked_frame)
95 return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);
96
97 while (1) {
98 ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
99 ff_inlink_consume_frame(inlink, &cur_frame);
100 if (ret < 0) {
101 return ret;
102 } else if (ret) {
103 /* TODO return the frame instead of copying it */
104 return return_or_keep_frame(buf, frame, cur_frame, flags);
105 } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
106 return status;
107 } else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
108 return AVERROR(EAGAIN);
109 } else if (inlink->frame_wanted_out) {
110 ret = ff_filter_graph_run_once(ctx->graph);
111 if (ret < 0)
112 return ret;
113 } else {
114 ff_inlink_request_frame(inlink);
115 }
116 }
117}
118
119int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
120{
121 return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
122}
123
124int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx,
125 AVFrame *frame, int nb_samples)
126{
127 return get_frame_internal(ctx, frame, 0, nb_samples);
128}
129
130AVBufferSinkParams *av_buffersink_params_alloc(void)
131{
132 static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
133 AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));
134 if (!params)
135 return NULL;
136
137 params->pixel_fmts = pixel_fmts;
138 return params;
139}
140
141AVABufferSinkParams *av_abuffersink_params_alloc(void)
142{
143 AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams));
144
145 if (!params)
146 return NULL;
147 return params;
148}
149
150static av_cold int common_init(AVFilterContext *ctx)
151{
152 BufferSinkContext *buf = ctx->priv;
153
154 buf->warning_limit = 100;
155 return 0;
156}
157
158static int activate(AVFilterContext *ctx)
159{
160 BufferSinkContext *buf = ctx->priv;
161
162 if (buf->warning_limit &&
163 ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= buf->warning_limit) {
164 av_log(ctx, AV_LOG_WARNING,
165 "%d buffers queued in %s, something may be wrong.\n",
166 buf->warning_limit,
167 (char *)av_x_if_null(ctx->name, ctx->filter->name));
168 buf->warning_limit *= 10;
169 }
170
171 /* The frame is queued, the rest is up to get_frame_internal */
172 return 0;
173}
174
175void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
176{
177 AVFilterLink *inlink = ctx->inputs[0];
178
179 inlink->min_samples = inlink->max_samples =
180 inlink->partial_buf_size = frame_size;
181}
182
183#define MAKE_AVFILTERLINK_ACCESSOR(type, field) \
184type av_buffersink_get_##field(const AVFilterContext *ctx) { \
185 av_assert0(ctx->filter->activate == activate); \
186 return ctx->inputs[0]->field; \
187}
188
189MAKE_AVFILTERLINK_ACCESSOR(enum AVMediaType , type )
190MAKE_AVFILTERLINK_ACCESSOR(AVRational , time_base )
191MAKE_AVFILTERLINK_ACCESSOR(int , format )
192
193MAKE_AVFILTERLINK_ACCESSOR(AVRational , frame_rate )
194MAKE_AVFILTERLINK_ACCESSOR(int , w )
195MAKE_AVFILTERLINK_ACCESSOR(int , h )
196MAKE_AVFILTERLINK_ACCESSOR(AVRational , sample_aspect_ratio)
197
198MAKE_AVFILTERLINK_ACCESSOR(int , channels )
199MAKE_AVFILTERLINK_ACCESSOR(uint64_t , channel_layout )
200MAKE_AVFILTERLINK_ACCESSOR(int , sample_rate )
201
202MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef * , hw_frames_ctx )
203
204static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
205{
206 BufferSinkContext *buf = ctx->priv;
207 AVBufferSinkParams *params = opaque;
208 int ret;
209
210 if (params) {
211 if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0)
212 return ret;
213 }
214
215 return common_init(ctx);
216}
217
218#define CHECK_LIST_SIZE(field) \
219 if (buf->field ## _size % sizeof(*buf->field)) { \
220 av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
221 "should be multiple of %d\n", \
222 buf->field ## _size, (int)sizeof(*buf->field)); \
223 return AVERROR(EINVAL); \
224 }
225static int vsink_query_formats(AVFilterContext *ctx)
226{
227 BufferSinkContext *buf = ctx->priv;
228 AVFilterFormats *formats = NULL;
229 unsigned i;
230 int ret;
231
232 CHECK_LIST_SIZE(pixel_fmts)
233 if (buf->pixel_fmts_size) {
234 for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
235 if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0)
236 return ret;
237 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
238 return ret;
239 } else {
240 if ((ret = ff_default_query_formats(ctx)) < 0)
241 return ret;
242 }
243
244 return 0;
245}
246
247static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
248{
249 BufferSinkContext *buf = ctx->priv;
250 AVABufferSinkParams *params = opaque;
251 int ret;
252
253 if (params) {
254 if ((ret = av_opt_set_int_list(buf, "sample_fmts", params->sample_fmts, AV_SAMPLE_FMT_NONE, 0)) < 0 ||
255 (ret = av_opt_set_int_list(buf, "sample_rates", params->sample_rates, -1, 0)) < 0 ||
256 (ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 ||
257 (ret = av_opt_set_int_list(buf, "channel_counts", params->channel_counts, -1, 0)) < 0 ||
258 (ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0)
259 return ret;
260 }
261 return common_init(ctx);
262}
263
264static int asink_query_formats(AVFilterContext *ctx)
265{
266 BufferSinkContext *buf = ctx->priv;
267 AVFilterFormats *formats = NULL;
268 AVFilterChannelLayouts *layouts = NULL;
269 unsigned i;
270 int ret;
271
272 CHECK_LIST_SIZE(sample_fmts)
273 CHECK_LIST_SIZE(sample_rates)
274 CHECK_LIST_SIZE(channel_layouts)
275 CHECK_LIST_SIZE(channel_counts)
276
277 if (buf->sample_fmts_size) {
278 for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
279 if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0)
280 return ret;
281 if ((ret = ff_set_common_formats(ctx, formats)) < 0)
282 return ret;
283 }
284
285 if (buf->channel_layouts_size || buf->channel_counts_size ||
286 buf->all_channel_counts) {
287 for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
288 if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)
289 return ret;
290 for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
291 if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)
292 return ret;
293 if (buf->all_channel_counts) {
294 if (layouts)
295 av_log(ctx, AV_LOG_WARNING,
296 "Conflicting all_channel_counts and list in options\n");
297 else if (!(layouts = ff_all_channel_counts()))
298 return AVERROR(ENOMEM);
299 }
300 if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
301 return ret;
302 }
303
304 if (buf->sample_rates_size) {
305 formats = NULL;
306 for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
307 if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0)
308 return ret;
309 if ((ret = ff_set_common_samplerates(ctx, formats)) < 0)
310 return ret;
311 }
312
313 return 0;
314}
315
316#define OFFSET(x) offsetof(BufferSinkContext, x)
317#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
318static const AVOption buffersink_options[] = {
319 { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
320 { NULL },
321};
322#undef FLAGS
323#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
324static const AVOption abuffersink_options[] = {
325 { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
326 { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS },
327 { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
328 { "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
329 { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
330 { NULL },
331};
332#undef FLAGS
333
334AVFILTER_DEFINE_CLASS(buffersink);
335AVFILTER_DEFINE_CLASS(abuffersink);
336
337static const AVFilterPad avfilter_vsink_buffer_inputs[] = {
338 {
339 .name = "default",
340 .type = AVMEDIA_TYPE_VIDEO,
341 },
342 { NULL }
343};
344
345AVFilter ff_vsink_buffer = {
346 .name = "buffersink",
347 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
348 .priv_size = sizeof(BufferSinkContext),
349 .priv_class = &buffersink_class,
350 .init_opaque = vsink_init,
351
352 .query_formats = vsink_query_formats,
353 .activate = activate,
354 .inputs = avfilter_vsink_buffer_inputs,
355 .outputs = NULL,
356};
357
358static const AVFilterPad avfilter_asink_abuffer_inputs[] = {
359 {
360 .name = "default",
361 .type = AVMEDIA_TYPE_AUDIO,
362 },
363 { NULL }
364};
365
366AVFilter ff_asink_abuffer = {
367 .name = "abuffersink",
368 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
369 .priv_class = &abuffersink_class,
370 .priv_size = sizeof(BufferSinkContext),
371 .init_opaque = asink_init,
372
373 .query_formats = asink_query_formats,
374 .activate = activate,
375 .inputs = avfilter_asink_abuffer_inputs,
376 .outputs = NULL,
377};
378
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