| /* |
| * Copyright (c) 2011 Stefano Sabatini |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg 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 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * buffer sink |
| */ |
| |
| #include "libavutil/audio_fifo.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/channel_layout.h" |
| #include "libavutil/common.h" |
| #include "libavutil/internal.h" |
| #include "libavutil/mathematics.h" |
| #include "libavutil/opt.h" |
| |
| #include "audio.h" |
| #include "avfilter.h" |
| #include "buffersink.h" |
| #include "internal.h" |
| |
| typedef struct BufferSinkContext { |
| const AVClass *class; |
| AVFifoBuffer *fifo; ///< FIFO buffer of video frame references |
| unsigned warning_limit; |
| |
| /* only used for video */ |
| enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1 |
| int pixel_fmts_size; |
| |
| /* only used for audio */ |
| enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE |
| int sample_fmts_size; |
| int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1 |
| int channel_layouts_size; |
| int *channel_counts; ///< list of accepted channel counts, terminated by -1 |
| int channel_counts_size; |
| int all_channel_counts; |
| int *sample_rates; ///< list of accepted sample rates, terminated by -1 |
| int sample_rates_size; |
| |
| /* only used for compat API */ |
| AVAudioFifo *audio_fifo; ///< FIFO for audio samples |
| int64_t next_pts; ///< interpolating audio pts |
| } BufferSinkContext; |
| |
| #define NB_ITEMS(list) (list ## _size / sizeof(*list)) |
| #define FIFO_INIT_SIZE 8 |
| #define FIFO_INIT_ELEMENT_SIZE sizeof(void *) |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| BufferSinkContext *sink = ctx->priv; |
| AVFrame *frame; |
| |
| if (sink->audio_fifo) |
| av_audio_fifo_free(sink->audio_fifo); |
| |
| if (sink->fifo) { |
| while (av_fifo_size(sink->fifo) >= FIFO_INIT_ELEMENT_SIZE) { |
| av_fifo_generic_read(sink->fifo, &frame, sizeof(frame), NULL); |
| av_frame_free(&frame); |
| } |
| av_fifo_freep(&sink->fifo); |
| } |
| } |
| |
| static int add_buffer_ref(AVFilterContext *ctx, AVFrame *ref) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| |
| if (av_fifo_space(buf->fifo) < FIFO_INIT_ELEMENT_SIZE) { |
| /* realloc fifo size */ |
| if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Cannot buffer more frames. Consume some available frames " |
| "before adding new ones.\n"); |
| return AVERROR(ENOMEM); |
| } |
| } |
| |
| /* cache frame */ |
| av_fifo_generic_write(buf->fifo, &ref, FIFO_INIT_ELEMENT_SIZE, NULL); |
| return 0; |
| } |
| |
| static int filter_frame(AVFilterLink *link, AVFrame *frame) |
| { |
| AVFilterContext *ctx = link->dst; |
| BufferSinkContext *buf = link->dst->priv; |
| int ret; |
| |
| if ((ret = add_buffer_ref(ctx, frame)) < 0) |
| return ret; |
| if (buf->warning_limit && |
| av_fifo_size(buf->fifo) / FIFO_INIT_ELEMENT_SIZE >= buf->warning_limit) { |
| av_log(ctx, AV_LOG_WARNING, |
| "%d buffers queued in %s, something may be wrong.\n", |
| buf->warning_limit, |
| (char *)av_x_if_null(ctx->name, ctx->filter->name)); |
| buf->warning_limit *= 10; |
| } |
| return 0; |
| } |
| |
| int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame) |
| { |
| return av_buffersink_get_frame_flags(ctx, frame, 0); |
| } |
| |
| int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| int ret; |
| AVFrame *cur_frame; |
| |
| /* no picref available, fetch it from the filterchain */ |
| while (!av_fifo_size(buf->fifo)) { |
| if (inlink->status) |
| return inlink->status; |
| if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST) |
| return AVERROR(EAGAIN); |
| if ((ret = ff_request_frame(inlink)) < 0) |
| return ret; |
| while (inlink->frame_wanted_out) { |
| ret = ff_filter_graph_run_once(ctx->graph); |
| if (ret < 0) |
| return ret; |
| } |
| } |
| |
| if (flags & AV_BUFFERSINK_FLAG_PEEK) { |
| cur_frame = *((AVFrame **)av_fifo_peek2(buf->fifo, 0)); |
| if ((ret = av_frame_ref(frame, cur_frame)) < 0) |
| return ret; |
| } else { |
| av_fifo_generic_read(buf->fifo, &cur_frame, sizeof(cur_frame), NULL); |
| av_frame_move_ref(frame, cur_frame); |
| av_frame_free(&cur_frame); |
| } |
| |
| return 0; |
| } |
| |
| static int read_from_fifo(AVFilterContext *ctx, AVFrame *frame, |
| int nb_samples) |
| { |
| BufferSinkContext *s = ctx->priv; |
| AVFilterLink *link = ctx->inputs[0]; |
| AVFrame *tmp; |
| |
| if (!(tmp = ff_get_audio_buffer(link, nb_samples))) |
| return AVERROR(ENOMEM); |
| av_audio_fifo_read(s->audio_fifo, (void**)tmp->extended_data, nb_samples); |
| |
| tmp->pts = s->next_pts; |
| if (s->next_pts != AV_NOPTS_VALUE) |
| s->next_pts += av_rescale_q(nb_samples, (AVRational){1, link->sample_rate}, |
| link->time_base); |
| |
| av_frame_move_ref(frame, tmp); |
| av_frame_free(&tmp); |
| |
| return 0; |
| } |
| |
| int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx, |
| AVFrame *frame, int nb_samples) |
| { |
| BufferSinkContext *s = ctx->priv; |
| AVFilterLink *link = ctx->inputs[0]; |
| AVFrame *cur_frame; |
| int ret = 0; |
| |
| if (!s->audio_fifo) { |
| int nb_channels = link->channels; |
| if (!(s->audio_fifo = av_audio_fifo_alloc(link->format, nb_channels, nb_samples))) |
| return AVERROR(ENOMEM); |
| } |
| |
| while (ret >= 0) { |
| if (av_audio_fifo_size(s->audio_fifo) >= nb_samples) |
| return read_from_fifo(ctx, frame, nb_samples); |
| |
| if (!(cur_frame = av_frame_alloc())) |
| return AVERROR(ENOMEM); |
| ret = av_buffersink_get_frame_flags(ctx, cur_frame, 0); |
| if (ret == AVERROR_EOF && av_audio_fifo_size(s->audio_fifo)) { |
| av_frame_free(&cur_frame); |
| return read_from_fifo(ctx, frame, av_audio_fifo_size(s->audio_fifo)); |
| } else if (ret < 0) { |
| av_frame_free(&cur_frame); |
| return ret; |
| } |
| |
| if (cur_frame->pts != AV_NOPTS_VALUE) { |
| s->next_pts = cur_frame->pts - |
| av_rescale_q(av_audio_fifo_size(s->audio_fifo), |
| (AVRational){ 1, link->sample_rate }, |
| link->time_base); |
| } |
| |
| ret = av_audio_fifo_write(s->audio_fifo, (void**)cur_frame->extended_data, |
| cur_frame->nb_samples); |
| av_frame_free(&cur_frame); |
| } |
| |
| return ret; |
| } |
| |
| AVBufferSinkParams *av_buffersink_params_alloc(void) |
| { |
| static const int pixel_fmts[] = { AV_PIX_FMT_NONE }; |
| AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams)); |
| if (!params) |
| return NULL; |
| |
| params->pixel_fmts = pixel_fmts; |
| return params; |
| } |
| |
| AVABufferSinkParams *av_abuffersink_params_alloc(void) |
| { |
| AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams)); |
| |
| if (!params) |
| return NULL; |
| return params; |
| } |
| |
| static av_cold int common_init(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| |
| buf->fifo = av_fifo_alloc_array(FIFO_INIT_SIZE, FIFO_INIT_ELEMENT_SIZE); |
| if (!buf->fifo) { |
| av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n"); |
| return AVERROR(ENOMEM); |
| } |
| buf->warning_limit = 100; |
| buf->next_pts = AV_NOPTS_VALUE; |
| return 0; |
| } |
| |
| void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size) |
| { |
| AVFilterLink *inlink = ctx->inputs[0]; |
| |
| inlink->min_samples = inlink->max_samples = |
| inlink->partial_buf_size = frame_size; |
| } |
| |
| AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx) |
| { |
| av_assert0( !strcmp(ctx->filter->name, "buffersink") |
| || !strcmp(ctx->filter->name, "ffbuffersink")); |
| |
| return ctx->inputs[0]->frame_rate; |
| } |
| |
| static av_cold int vsink_init(AVFilterContext *ctx, void *opaque) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVBufferSinkParams *params = opaque; |
| int ret; |
| |
| if (params) { |
| if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0) |
| return ret; |
| } |
| |
| return common_init(ctx); |
| } |
| |
| #define CHECK_LIST_SIZE(field) \ |
| if (buf->field ## _size % sizeof(*buf->field)) { \ |
| av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \ |
| "should be multiple of %d\n", \ |
| buf->field ## _size, (int)sizeof(*buf->field)); \ |
| return AVERROR(EINVAL); \ |
| } |
| static int vsink_query_formats(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVFilterFormats *formats = NULL; |
| unsigned i; |
| int ret; |
| |
| CHECK_LIST_SIZE(pixel_fmts) |
| if (buf->pixel_fmts_size) { |
| for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++) |
| if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0) |
| return ret; |
| if ((ret = ff_set_common_formats(ctx, formats)) < 0) |
| return ret; |
| } else { |
| if ((ret = ff_default_query_formats(ctx)) < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static av_cold int asink_init(AVFilterContext *ctx, void *opaque) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVABufferSinkParams *params = opaque; |
| int ret; |
| |
| if (params) { |
| if ((ret = av_opt_set_int_list(buf, "sample_fmts", params->sample_fmts, AV_SAMPLE_FMT_NONE, 0)) < 0 || |
| (ret = av_opt_set_int_list(buf, "sample_rates", params->sample_rates, -1, 0)) < 0 || |
| (ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 || |
| (ret = av_opt_set_int_list(buf, "channel_counts", params->channel_counts, -1, 0)) < 0 || |
| (ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0) |
| return ret; |
| } |
| return common_init(ctx); |
| } |
| |
| static int asink_query_formats(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVFilterFormats *formats = NULL; |
| AVFilterChannelLayouts *layouts = NULL; |
| unsigned i; |
| int ret; |
| |
| CHECK_LIST_SIZE(sample_fmts) |
| CHECK_LIST_SIZE(sample_rates) |
| CHECK_LIST_SIZE(channel_layouts) |
| CHECK_LIST_SIZE(channel_counts) |
| |
| if (buf->sample_fmts_size) { |
| for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++) |
| if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0) |
| return ret; |
| if ((ret = ff_set_common_formats(ctx, formats)) < 0) |
| return ret; |
| } |
| |
| if (buf->channel_layouts_size || buf->channel_counts_size || |
| buf->all_channel_counts) { |
| for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++) |
| if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0) |
| return ret; |
| for (i = 0; i < NB_ITEMS(buf->channel_counts); i++) |
| if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0) |
| return ret; |
| if (buf->all_channel_counts) { |
| if (layouts) |
| av_log(ctx, AV_LOG_WARNING, |
| "Conflicting all_channel_counts and list in options\n"); |
| else if (!(layouts = ff_all_channel_counts())) |
| return AVERROR(ENOMEM); |
| } |
| if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0) |
| return ret; |
| } |
| |
| if (buf->sample_rates_size) { |
| formats = NULL; |
| for (i = 0; i < NB_ITEMS(buf->sample_rates); i++) |
| if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0) |
| return ret; |
| if ((ret = ff_set_common_samplerates(ctx, formats)) < 0) |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| #define OFFSET(x) offsetof(BufferSinkContext, x) |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| static const AVOption buffersink_options[] = { |
| { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS }, |
| { NULL }, |
| }; |
| #undef FLAGS |
| #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
| static const AVOption abuffersink_options[] = { |
| { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS }, |
| { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS }, |
| { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS }, |
| { "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS }, |
| { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS }, |
| { NULL }, |
| }; |
| #undef FLAGS |
| |
| AVFILTER_DEFINE_CLASS(buffersink); |
| AVFILTER_DEFINE_CLASS(abuffersink); |
| |
| static const AVFilterPad avfilter_vsink_buffer_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vsink_buffer = { |
| .name = "buffersink", |
| .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."), |
| .priv_size = sizeof(BufferSinkContext), |
| .priv_class = &buffersink_class, |
| .init_opaque = vsink_init, |
| .uninit = uninit, |
| |
| .query_formats = vsink_query_formats, |
| .inputs = avfilter_vsink_buffer_inputs, |
| .outputs = NULL, |
| }; |
| |
| static const AVFilterPad avfilter_asink_abuffer_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_asink_abuffer = { |
| .name = "abuffersink", |
| .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."), |
| .priv_class = &abuffersink_class, |
| .priv_size = sizeof(BufferSinkContext), |
| .init_opaque = asink_init, |
| .uninit = uninit, |
| |
| .query_formats = asink_query_formats, |
| .inputs = avfilter_asink_abuffer_inputs, |
| .outputs = NULL, |
| }; |