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https://git.ffmpeg.org/ffmpeg.git
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807d4b6355
Do not assume that ff_request_frame() returning success implies a frame has arrived in the FIFO. Instead, just loop until a frame is in the FIFO. It does not change anything since the same loop is present in ff_request_frame(), confirmed by an assertion.
455 lines
15 KiB
C
455 lines
15 KiB
C
/*
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* Copyright (c) 2011 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* buffer sink
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*/
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#include "libavutil/audio_fifo.h"
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/internal.h"
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#include "libavutil/mathematics.h"
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#include "libavutil/opt.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "buffersink.h"
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#include "internal.h"
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typedef struct BufferSinkContext {
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const AVClass *class;
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AVFifoBuffer *fifo; ///< FIFO buffer of video frame references
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unsigned warning_limit;
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/* only used for video */
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enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1
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int pixel_fmts_size;
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/* only used for audio */
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enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
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int sample_fmts_size;
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int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
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int channel_layouts_size;
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int *channel_counts; ///< list of accepted channel counts, terminated by -1
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int channel_counts_size;
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int all_channel_counts;
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int *sample_rates; ///< list of accepted sample rates, terminated by -1
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int sample_rates_size;
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/* only used for compat API */
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AVAudioFifo *audio_fifo; ///< FIFO for audio samples
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int64_t next_pts; ///< interpolating audio pts
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} BufferSinkContext;
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#define NB_ITEMS(list) (list ## _size / sizeof(*list))
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#define FIFO_INIT_SIZE 8
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#define FIFO_INIT_ELEMENT_SIZE sizeof(void *)
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static av_cold void uninit(AVFilterContext *ctx)
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{
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BufferSinkContext *sink = ctx->priv;
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AVFrame *frame;
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if (sink->audio_fifo)
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av_audio_fifo_free(sink->audio_fifo);
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if (sink->fifo) {
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while (av_fifo_size(sink->fifo) >= FIFO_INIT_ELEMENT_SIZE) {
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av_fifo_generic_read(sink->fifo, &frame, sizeof(frame), NULL);
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av_frame_free(&frame);
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}
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av_fifo_freep(&sink->fifo);
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}
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}
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static int add_buffer_ref(AVFilterContext *ctx, AVFrame *ref)
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{
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BufferSinkContext *buf = ctx->priv;
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if (av_fifo_space(buf->fifo) < FIFO_INIT_ELEMENT_SIZE) {
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/* realloc fifo size */
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if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) {
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av_log(ctx, AV_LOG_ERROR,
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"Cannot buffer more frames. Consume some available frames "
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"before adding new ones.\n");
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return AVERROR(ENOMEM);
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}
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}
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/* cache frame */
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av_fifo_generic_write(buf->fifo, &ref, FIFO_INIT_ELEMENT_SIZE, NULL);
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return 0;
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}
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static int filter_frame(AVFilterLink *link, AVFrame *frame)
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{
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AVFilterContext *ctx = link->dst;
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BufferSinkContext *buf = link->dst->priv;
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int ret;
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if ((ret = add_buffer_ref(ctx, frame)) < 0)
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return ret;
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if (buf->warning_limit &&
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av_fifo_size(buf->fifo) / FIFO_INIT_ELEMENT_SIZE >= buf->warning_limit) {
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av_log(ctx, AV_LOG_WARNING,
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"%d buffers queued in %s, something may be wrong.\n",
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buf->warning_limit,
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(char *)av_x_if_null(ctx->name, ctx->filter->name));
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buf->warning_limit *= 10;
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}
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return 0;
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}
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int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame)
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{
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return av_buffersink_get_frame_flags(ctx, frame, 0);
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}
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int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
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{
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BufferSinkContext *buf = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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int ret;
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AVFrame *cur_frame;
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/* no picref available, fetch it from the filterchain */
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while (!av_fifo_size(buf->fifo)) {
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if (inlink->closed)
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return AVERROR_EOF;
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if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
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return AVERROR(EAGAIN);
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if ((ret = ff_request_frame(inlink)) < 0)
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return ret;
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}
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if (flags & AV_BUFFERSINK_FLAG_PEEK) {
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cur_frame = *((AVFrame **)av_fifo_peek2(buf->fifo, 0));
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if ((ret = av_frame_ref(frame, cur_frame)) < 0)
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return ret;
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} else {
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av_fifo_generic_read(buf->fifo, &cur_frame, sizeof(cur_frame), NULL);
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av_frame_move_ref(frame, cur_frame);
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av_frame_free(&cur_frame);
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}
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return 0;
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}
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static int read_from_fifo(AVFilterContext *ctx, AVFrame *frame,
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int nb_samples)
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{
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BufferSinkContext *s = ctx->priv;
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AVFilterLink *link = ctx->inputs[0];
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AVFrame *tmp;
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if (!(tmp = ff_get_audio_buffer(link, nb_samples)))
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return AVERROR(ENOMEM);
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av_audio_fifo_read(s->audio_fifo, (void**)tmp->extended_data, nb_samples);
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tmp->pts = s->next_pts;
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if (s->next_pts != AV_NOPTS_VALUE)
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s->next_pts += av_rescale_q(nb_samples, (AVRational){1, link->sample_rate},
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link->time_base);
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av_frame_move_ref(frame, tmp);
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av_frame_free(&tmp);
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return 0;
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}
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int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx,
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AVFrame *frame, int nb_samples)
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{
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BufferSinkContext *s = ctx->priv;
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AVFilterLink *link = ctx->inputs[0];
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AVFrame *cur_frame;
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int ret = 0;
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if (!s->audio_fifo) {
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int nb_channels = link->channels;
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if (!(s->audio_fifo = av_audio_fifo_alloc(link->format, nb_channels, nb_samples)))
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return AVERROR(ENOMEM);
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}
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while (ret >= 0) {
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if (av_audio_fifo_size(s->audio_fifo) >= nb_samples)
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return read_from_fifo(ctx, frame, nb_samples);
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if (!(cur_frame = av_frame_alloc()))
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return AVERROR(ENOMEM);
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ret = av_buffersink_get_frame_flags(ctx, cur_frame, 0);
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if (ret == AVERROR_EOF && av_audio_fifo_size(s->audio_fifo)) {
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av_frame_free(&cur_frame);
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return read_from_fifo(ctx, frame, av_audio_fifo_size(s->audio_fifo));
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} else if (ret < 0) {
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av_frame_free(&cur_frame);
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return ret;
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}
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if (cur_frame->pts != AV_NOPTS_VALUE) {
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s->next_pts = cur_frame->pts -
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av_rescale_q(av_audio_fifo_size(s->audio_fifo),
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(AVRational){ 1, link->sample_rate },
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link->time_base);
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}
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ret = av_audio_fifo_write(s->audio_fifo, (void**)cur_frame->extended_data,
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cur_frame->nb_samples);
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av_frame_free(&cur_frame);
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}
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return ret;
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}
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AVBufferSinkParams *av_buffersink_params_alloc(void)
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{
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static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
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AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));
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if (!params)
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return NULL;
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params->pixel_fmts = pixel_fmts;
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return params;
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}
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AVABufferSinkParams *av_abuffersink_params_alloc(void)
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{
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AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams));
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if (!params)
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return NULL;
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return params;
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}
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static av_cold int common_init(AVFilterContext *ctx)
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{
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BufferSinkContext *buf = ctx->priv;
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buf->fifo = av_fifo_alloc_array(FIFO_INIT_SIZE, FIFO_INIT_ELEMENT_SIZE);
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if (!buf->fifo) {
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av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n");
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return AVERROR(ENOMEM);
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}
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buf->warning_limit = 100;
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buf->next_pts = AV_NOPTS_VALUE;
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return 0;
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}
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void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
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{
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AVFilterLink *inlink = ctx->inputs[0];
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inlink->min_samples = inlink->max_samples =
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inlink->partial_buf_size = frame_size;
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}
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AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx)
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{
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av_assert0( !strcmp(ctx->filter->name, "buffersink")
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|| !strcmp(ctx->filter->name, "ffbuffersink"));
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return ctx->inputs[0]->frame_rate;
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}
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static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
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{
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BufferSinkContext *buf = ctx->priv;
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AVBufferSinkParams *params = opaque;
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int ret;
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if (params) {
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if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0)
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return ret;
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}
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return common_init(ctx);
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}
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#define CHECK_LIST_SIZE(field) \
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if (buf->field ## _size % sizeof(*buf->field)) { \
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av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
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"should be multiple of %d\n", \
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buf->field ## _size, (int)sizeof(*buf->field)); \
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return AVERROR(EINVAL); \
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}
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static int vsink_query_formats(AVFilterContext *ctx)
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{
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BufferSinkContext *buf = ctx->priv;
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AVFilterFormats *formats = NULL;
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unsigned i;
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int ret;
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CHECK_LIST_SIZE(pixel_fmts)
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if (buf->pixel_fmts_size) {
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for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
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if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0) {
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ff_formats_unref(&formats);
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return ret;
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}
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ff_set_common_formats(ctx, formats);
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} else {
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ff_default_query_formats(ctx);
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}
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return 0;
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}
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static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
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{
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BufferSinkContext *buf = ctx->priv;
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AVABufferSinkParams *params = opaque;
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int ret;
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if (params) {
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if ((ret = av_opt_set_int_list(buf, "sample_fmts", params->sample_fmts, AV_SAMPLE_FMT_NONE, 0)) < 0 ||
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(ret = av_opt_set_int_list(buf, "sample_rates", params->sample_rates, -1, 0)) < 0 ||
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(ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 ||
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(ret = av_opt_set_int_list(buf, "channel_counts", params->channel_counts, -1, 0)) < 0 ||
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(ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0)
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return ret;
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}
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return common_init(ctx);
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}
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static int asink_query_formats(AVFilterContext *ctx)
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{
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BufferSinkContext *buf = ctx->priv;
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AVFilterFormats *formats = NULL;
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AVFilterChannelLayouts *layouts = NULL;
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unsigned i;
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int ret;
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CHECK_LIST_SIZE(sample_fmts)
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CHECK_LIST_SIZE(sample_rates)
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CHECK_LIST_SIZE(channel_layouts)
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CHECK_LIST_SIZE(channel_counts)
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if (buf->sample_fmts_size) {
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for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
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if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0) {
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ff_formats_unref(&formats);
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return ret;
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}
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ff_set_common_formats(ctx, formats);
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}
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if (buf->channel_layouts_size || buf->channel_counts_size ||
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buf->all_channel_counts) {
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for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
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if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0) {
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ff_channel_layouts_unref(&layouts);
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return ret;
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}
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for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
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if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0) {
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ff_channel_layouts_unref(&layouts);
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return ret;
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}
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if (buf->all_channel_counts) {
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if (layouts)
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av_log(ctx, AV_LOG_WARNING,
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"Conflicting all_channel_counts and list in options\n");
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else if (!(layouts = ff_all_channel_counts()))
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return AVERROR(ENOMEM);
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}
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ff_set_common_channel_layouts(ctx, layouts);
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}
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if (buf->sample_rates_size) {
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formats = NULL;
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for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
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if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0) {
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ff_formats_unref(&formats);
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return ret;
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}
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ff_set_common_samplerates(ctx, formats);
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}
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return 0;
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}
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#define OFFSET(x) offsetof(BufferSinkContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption buffersink_options[] = {
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{ "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
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{ NULL },
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};
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#undef FLAGS
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption abuffersink_options[] = {
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{ "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
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{ "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS },
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{ "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
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{ "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
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{ "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
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{ NULL },
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};
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#undef FLAGS
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AVFILTER_DEFINE_CLASS(buffersink);
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AVFILTER_DEFINE_CLASS(abuffersink);
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static const AVFilterPad avfilter_vsink_buffer_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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AVFilter ff_vsink_buffer = {
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.name = "buffersink",
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.description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
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.priv_size = sizeof(BufferSinkContext),
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.priv_class = &buffersink_class,
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.init_opaque = vsink_init,
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.uninit = uninit,
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.query_formats = vsink_query_formats,
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.inputs = avfilter_vsink_buffer_inputs,
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.outputs = NULL,
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};
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static const AVFilterPad avfilter_asink_abuffer_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.filter_frame = filter_frame,
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},
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{ NULL }
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};
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AVFilter ff_asink_abuffer = {
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.name = "abuffersink",
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.description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
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.priv_class = &abuffersink_class,
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.priv_size = sizeof(BufferSinkContext),
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.init_opaque = asink_init,
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.uninit = uninit,
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.query_formats = asink_query_formats,
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.inputs = avfilter_asink_abuffer_inputs,
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.outputs = NULL,
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};
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