2 * Copyright (c) 2011 Stefano Sabatini
4 * This file is part of FFmpeg.
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.
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.
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
26 #include "libavutil/avassert.h"
27 #include "libavutil/fifo.h"
29 #include "buffersink.h"
32 AVBufferSinkParams *av_buffersink_params_alloc(void)
34 static const int pixel_fmts[] = { -1 };
35 AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));
39 params->pixel_fmts = pixel_fmts;
43 AVABufferSinkParams *av_abuffersink_params_alloc(void)
45 static const int sample_fmts[] = { -1 };
46 static const int64_t channel_layouts[] = { -1 };
47 AVABufferSinkParams *params = av_malloc(sizeof(AVABufferSinkParams));
52 params->sample_fmts = sample_fmts;
53 params->channel_layouts = channel_layouts;
58 AVFifoBuffer *fifo; ///< FIFO buffer of video frame references
59 unsigned warning_limit;
61 /* only used for video */
62 enum PixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1
64 /* only used for audio */
65 enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
66 int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
69 #define FIFO_INIT_SIZE 8
71 static av_cold int common_init(AVFilterContext *ctx)
73 BufferSinkContext *buf = ctx->priv;
75 buf->fifo = av_fifo_alloc(FIFO_INIT_SIZE*sizeof(AVFilterBufferRef *));
77 av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n");
78 return AVERROR(ENOMEM);
80 buf->warning_limit = 100;
84 static av_cold void common_uninit(AVFilterContext *ctx)
86 BufferSinkContext *buf = ctx->priv;
87 AVFilterBufferRef *picref;
90 while (av_fifo_size(buf->fifo) >= sizeof(AVFilterBufferRef *)) {
91 av_fifo_generic_read(buf->fifo, &picref, sizeof(picref), NULL);
92 avfilter_unref_buffer(picref);
94 av_fifo_free(buf->fifo);
99 static int end_frame(AVFilterLink *inlink)
101 AVFilterContext *ctx = inlink->dst;
102 BufferSinkContext *buf = inlink->dst->priv;
104 av_assert1(inlink->cur_buf);
105 if (av_fifo_space(buf->fifo) < sizeof(AVFilterBufferRef *)) {
106 /* realloc fifo size */
107 if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) {
108 av_log(ctx, AV_LOG_ERROR,
109 "Cannot buffer more frames. Consume some available frames "
110 "before adding new ones.\n");
111 return AVERROR(ENOMEM);
116 av_fifo_generic_write(buf->fifo,
117 &inlink->cur_buf, sizeof(AVFilterBufferRef *), NULL);
118 inlink->cur_buf = NULL;
119 if (buf->warning_limit &&
120 av_fifo_size(buf->fifo) / sizeof(AVFilterBufferRef *) >= buf->warning_limit) {
121 av_log(ctx, AV_LOG_WARNING,
122 "%d buffers queued in %s, something may be wrong.\n",
124 (char *)av_x_if_null(ctx->name, ctx->filter->name));
125 buf->warning_limit *= 10;
130 void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
132 AVFilterLink *inlink = ctx->inputs[0];
134 inlink->min_samples = inlink->max_samples =
135 inlink->partial_buf_size = frame_size;
138 int av_buffersink_get_buffer_ref(AVFilterContext *ctx,
139 AVFilterBufferRef **bufref, int flags)
141 BufferSinkContext *buf = ctx->priv;
142 AVFilterLink *inlink = ctx->inputs[0];
146 av_assert0( !strcmp(ctx->filter->name, "buffersink")
147 || !strcmp(ctx->filter->name, "abuffersink")
148 || !strcmp(ctx->filter->name, "ffbuffersink")
149 || !strcmp(ctx->filter->name, "ffabuffersink"));
151 /* no picref available, fetch it from the filterchain */
152 if (!av_fifo_size(buf->fifo)) {
153 if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
154 return AVERROR(EAGAIN);
155 if ((ret = ff_request_frame(inlink)) < 0)
159 if (!av_fifo_size(buf->fifo))
160 return AVERROR(EINVAL);
162 if (flags & AV_BUFFERSINK_FLAG_PEEK)
163 *bufref = *((AVFilterBufferRef **)av_fifo_peek2(buf->fifo, 0));
165 av_fifo_generic_read(buf->fifo, bufref, sizeof(*bufref), NULL);
170 AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx)
172 av_assert0( !strcmp(ctx->filter->name, "buffersink")
173 || !strcmp(ctx->filter->name, "ffbuffersink"));
175 return ctx->inputs[0]->frame_rate;
178 int av_buffersink_poll_frame(AVFilterContext *ctx)
180 BufferSinkContext *buf = ctx->priv;
181 AVFilterLink *inlink = ctx->inputs[0];
183 av_assert0( !strcmp(ctx->filter->name, "buffersink")
184 || !strcmp(ctx->filter->name, "abuffersink")
185 || !strcmp(ctx->filter->name, "ffbuffersink")
186 || !strcmp(ctx->filter->name, "ffabuffersink"));
188 return av_fifo_size(buf->fifo)/sizeof(AVFilterBufferRef *) + ff_poll_frame(inlink);
191 #if CONFIG_BUFFERSINK_FILTER || CONFIG_FFBUFFERSINK_FILTER
193 static av_cold int vsink_init(AVFilterContext *ctx, const char *args, void *opaque)
195 BufferSinkContext *buf = ctx->priv;
196 AVBufferSinkParams *params = opaque;
198 if (params && params->pixel_fmts) {
199 const int *pixel_fmts = params->pixel_fmts;
201 buf->pixel_fmts = ff_copy_int_list(pixel_fmts);
202 if (!buf->pixel_fmts)
203 return AVERROR(ENOMEM);
206 return common_init(ctx);
209 static av_cold void vsink_uninit(AVFilterContext *ctx)
211 BufferSinkContext *buf = ctx->priv;
212 av_freep(&buf->pixel_fmts);
216 static int vsink_query_formats(AVFilterContext *ctx)
218 BufferSinkContext *buf = ctx->priv;
221 ff_set_common_formats(ctx, ff_make_format_list(buf->pixel_fmts));
223 ff_default_query_formats(ctx);
228 AVFilter avfilter_vsink_ffbuffersink = {
229 .name = "ffbuffersink",
230 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
231 .priv_size = sizeof(BufferSinkContext),
232 .init_opaque = vsink_init,
233 .uninit = vsink_uninit,
235 .query_formats = vsink_query_formats,
237 .inputs = (const AVFilterPad[]) {{ .name = "default",
238 .type = AVMEDIA_TYPE_VIDEO,
239 .end_frame = end_frame,
240 .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, },
242 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
245 AVFilter avfilter_vsink_buffersink = {
246 .name = "buffersink",
247 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
248 .priv_size = sizeof(BufferSinkContext),
249 .init_opaque = vsink_init,
250 .uninit = vsink_uninit,
252 .query_formats = vsink_query_formats,
254 .inputs = (const AVFilterPad[]) {{ .name = "default",
255 .type = AVMEDIA_TYPE_VIDEO,
256 .end_frame = end_frame,
257 .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, },
259 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
262 #endif /* CONFIG_BUFFERSINK_FILTER */
264 #if CONFIG_ABUFFERSINK_FILTER || CONFIG_FFABUFFERSINK_FILTER
266 static int filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
272 static av_cold int asink_init(AVFilterContext *ctx, const char *args, void *opaque)
274 BufferSinkContext *buf = ctx->priv;
275 AVABufferSinkParams *params = opaque;
277 if (params && params->sample_fmts) {
278 buf->sample_fmts = ff_copy_int_list (params->sample_fmts);
279 if (!buf->sample_fmts)
282 if (params && params->channel_layouts) {
283 buf->channel_layouts = ff_copy_int64_list(params->channel_layouts);
284 if (!buf->channel_layouts)
287 if (!common_init(ctx))
291 av_freep(&buf->sample_fmts);
292 av_freep(&buf->channel_layouts);
293 return AVERROR(ENOMEM);
296 static av_cold void asink_uninit(AVFilterContext *ctx)
298 BufferSinkContext *buf = ctx->priv;
300 av_freep(&buf->sample_fmts);
301 av_freep(&buf->channel_layouts);
305 static int asink_query_formats(AVFilterContext *ctx)
307 BufferSinkContext *buf = ctx->priv;
308 AVFilterFormats *formats = NULL;
309 AVFilterChannelLayouts *layouts = NULL;
311 if (buf->sample_fmts) {
312 if (!(formats = ff_make_format_list(buf->sample_fmts)))
313 return AVERROR(ENOMEM);
314 ff_set_common_formats(ctx, formats);
317 if (buf->channel_layouts) {
318 if (!(layouts = avfilter_make_format64_list(buf->channel_layouts)))
319 return AVERROR(ENOMEM);
320 ff_set_common_channel_layouts(ctx, layouts);
326 AVFilter avfilter_asink_ffabuffersink = {
327 .name = "ffabuffersink",
328 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
329 .init_opaque = asink_init,
330 .uninit = asink_uninit,
331 .priv_size = sizeof(BufferSinkContext),
332 .query_formats = asink_query_formats,
334 .inputs = (const AVFilterPad[]) {{ .name = "default",
335 .type = AVMEDIA_TYPE_AUDIO,
336 .filter_samples = filter_samples,
337 .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, },
339 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
342 AVFilter avfilter_asink_abuffersink = {
343 .name = "abuffersink",
344 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
345 .init_opaque = asink_init,
346 .uninit = asink_uninit,
347 .priv_size = sizeof(BufferSinkContext),
348 .query_formats = asink_query_formats,
350 .inputs = (const AVFilterPad[]) {{ .name = "default",
351 .type = AVMEDIA_TYPE_AUDIO,
352 .filter_samples = filter_samples,
353 .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, },
355 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
358 #endif /* CONFIG_ABUFFERSINK_FILTER */