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
60 /* only used for video */
61 enum PixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1
63 /* only used for audio */
64 enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
65 int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
68 #define FIFO_INIT_SIZE 8
70 static av_cold int common_init(AVFilterContext *ctx)
72 BufferSinkContext *buf = ctx->priv;
74 buf->fifo = av_fifo_alloc(FIFO_INIT_SIZE*sizeof(AVFilterBufferRef *));
76 av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n");
77 return AVERROR(ENOMEM);
82 static av_cold void common_uninit(AVFilterContext *ctx)
84 BufferSinkContext *buf = ctx->priv;
85 AVFilterBufferRef *picref;
88 while (av_fifo_size(buf->fifo) >= sizeof(AVFilterBufferRef *)) {
89 av_fifo_generic_read(buf->fifo, &picref, sizeof(picref), NULL);
90 avfilter_unref_buffer(picref);
92 av_fifo_free(buf->fifo);
97 static void end_frame(AVFilterLink *inlink)
99 AVFilterContext *ctx = inlink->dst;
100 BufferSinkContext *buf = inlink->dst->priv;
102 av_assert1(inlink->cur_buf);
103 if (av_fifo_space(buf->fifo) < sizeof(AVFilterBufferRef *)) {
104 /* realloc fifo size */
105 if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) {
106 av_log(ctx, AV_LOG_ERROR,
107 "Cannot buffer more frames. Consume some available frames "
108 "before adding new ones.\n");
114 av_fifo_generic_write(buf->fifo,
115 &inlink->cur_buf, sizeof(AVFilterBufferRef *), NULL);
118 int av_buffersink_get_buffer_ref(AVFilterContext *ctx,
119 AVFilterBufferRef **bufref, int flags)
121 BufferSinkContext *buf = ctx->priv;
122 AVFilterLink *inlink = ctx->inputs[0];
126 /* no picref available, fetch it from the filterchain */
127 if (!av_fifo_size(buf->fifo)) {
128 if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
129 return AVERROR(EAGAIN);
130 if ((ret = avfilter_request_frame(inlink)) < 0)
134 if (!av_fifo_size(buf->fifo))
135 return AVERROR(EINVAL);
137 if (flags & AV_BUFFERSINK_FLAG_PEEK)
138 *bufref = *((AVFilterBufferRef **)av_fifo_peek2(buf->fifo, 0));
140 av_fifo_generic_read(buf->fifo, bufref, sizeof(*bufref), NULL);
145 int av_buffersink_poll_frame(AVFilterContext *ctx)
147 BufferSinkContext *buf = ctx->priv;
148 AVFilterLink *inlink = ctx->inputs[0];
150 return av_fifo_size(buf->fifo)/sizeof(AVFilterBufferRef *) + avfilter_poll_frame(inlink);
153 #if FF_API_OLD_VSINK_API
154 int av_vsink_buffer_get_video_buffer_ref(AVFilterContext *ctx,
155 AVFilterBufferRef **picref, int flags)
157 return av_buffersink_get_buffer_ref(ctx, picref, flags);
161 #if CONFIG_BUFFERSINK_FILTER
163 static av_cold int vsink_init(AVFilterContext *ctx, const char *args, void *opaque)
165 BufferSinkContext *buf = ctx->priv;
166 av_unused AVBufferSinkParams *params;
169 av_log(ctx, AV_LOG_WARNING,
170 "No opaque field provided\n");
171 buf->pixel_fmts = NULL;
173 #if FF_API_OLD_VSINK_API
174 const int *pixel_fmts = (const enum PixelFormat *)opaque;
176 params = (AVBufferSinkParams *)opaque;
177 const int *pixel_fmts = params->pixel_fmts;
179 buf->pixel_fmts = ff_copy_int_list(pixel_fmts);
180 if (!buf->pixel_fmts)
181 return AVERROR(ENOMEM);
184 return common_init(ctx);
187 static av_cold void vsink_uninit(AVFilterContext *ctx)
189 BufferSinkContext *buf = ctx->priv;
190 av_freep(&buf->pixel_fmts);
191 return common_uninit(ctx);
194 static int vsink_query_formats(AVFilterContext *ctx)
196 BufferSinkContext *buf = ctx->priv;
199 avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(buf->pixel_fmts));
201 avfilter_default_query_formats(ctx);
206 AVFilter avfilter_vsink_buffersink = {
207 .name = "buffersink",
208 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
209 .priv_size = sizeof(BufferSinkContext),
211 .uninit = vsink_uninit,
213 .query_formats = vsink_query_formats,
215 .inputs = (const AVFilterPad[]) {{ .name = "default",
216 .type = AVMEDIA_TYPE_VIDEO,
217 .end_frame = end_frame,
218 .min_perms = AV_PERM_READ, },
220 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
223 #endif /* CONFIG_BUFFERSINK_FILTER */
225 #if CONFIG_ABUFFERSINK_FILTER
227 static void filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
232 static av_cold int asink_init(AVFilterContext *ctx, const char *args, void *opaque)
234 BufferSinkContext *buf = ctx->priv;
235 AVABufferSinkParams *params;
238 av_log(ctx, AV_LOG_ERROR,
239 "No opaque field provided, an AVABufferSinkParams struct is required\n");
240 return AVERROR(EINVAL);
242 params = (AVABufferSinkParams *)opaque;
244 buf->sample_fmts = ff_copy_int_list (params->sample_fmts);
245 buf->channel_layouts = ff_copy_int64_list(params->channel_layouts);
246 if (!buf->sample_fmts || !buf->channel_layouts) {
247 av_freep(&buf->sample_fmts);
248 av_freep(&buf->channel_layouts);
249 return AVERROR(ENOMEM);
252 return common_init(ctx);
255 static av_cold void asink_uninit(AVFilterContext *ctx)
257 BufferSinkContext *buf = ctx->priv;
259 av_freep(&buf->sample_fmts);
260 av_freep(&buf->channel_layouts);
261 return common_uninit(ctx);
264 static int asink_query_formats(AVFilterContext *ctx)
266 BufferSinkContext *buf = ctx->priv;
267 AVFilterFormats *formats = NULL;
268 AVFilterChannelLayouts *layouts = NULL;
270 if (!(formats = avfilter_make_format_list(buf->sample_fmts)))
271 return AVERROR(ENOMEM);
272 avfilter_set_common_sample_formats(ctx, formats);
274 if (!(layouts = avfilter_make_format64_list(buf->channel_layouts)))
275 return AVERROR(ENOMEM);
276 ff_set_common_channel_layouts(ctx, layouts);
277 ff_set_common_samplerates (ctx, ff_all_samplerates());
282 AVFilter avfilter_asink_abuffersink = {
283 .name = "abuffersink",
284 .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
286 .uninit = asink_uninit,
287 .priv_size = sizeof(BufferSinkContext),
288 .query_formats = asink_query_formats,
290 .inputs = (const AVFilterPad[]) {{ .name = "default",
291 .type = AVMEDIA_TYPE_AUDIO,
292 .filter_samples = filter_samples,
293 .min_perms = AV_PERM_READ, },
295 .outputs = (const AVFilterPad[]) {{ .name = NULL }},
298 #endif /* CONFIG_ABUFFERSINK_FILTER */