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![Nicolas George](/assets/img/avatar_default.png)
Add a field to the AVBufferSinkParams for a list of accepted channel counts. Change the default value for the lists in AVBufferSinkParams to NULL, to let lavfi fill them with something useful. The fail_enomem path is unneeded because filters are uninited on failure.
486 lines
15 KiB
C
486 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/avassert.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/fifo.h"
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#include "avfilter.h"
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#include "buffersink.h"
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#include "audio.h"
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#include "internal.h"
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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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typedef struct {
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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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/* 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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int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
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int all_channel_counts;
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} BufferSinkContext;
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#define FIFO_INIT_SIZE 8
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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(FIFO_INIT_SIZE*sizeof(AVFilterBufferRef *));
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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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return 0;
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}
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static av_cold void common_uninit(AVFilterContext *ctx)
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{
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BufferSinkContext *buf = ctx->priv;
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AVFilterBufferRef *picref;
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if (buf->fifo) {
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while (av_fifo_size(buf->fifo) >= sizeof(AVFilterBufferRef *)) {
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av_fifo_generic_read(buf->fifo, &picref, sizeof(picref), NULL);
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avfilter_unref_buffer(picref);
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}
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av_fifo_free(buf->fifo);
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buf->fifo = NULL;
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}
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}
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static int add_buffer_ref(AVFilterContext *ctx, AVFilterBufferRef *ref)
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{
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BufferSinkContext *buf = ctx->priv;
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if (av_fifo_space(buf->fifo) < sizeof(AVFilterBufferRef *)) {
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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, sizeof(AVFilterBufferRef *), NULL);
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *ref)
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{
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AVFilterContext *ctx = inlink->dst;
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BufferSinkContext *buf = inlink->dst->priv;
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int ret;
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if ((ret = add_buffer_ref(ctx, ref)) < 0)
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return ret;
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if (buf->warning_limit &&
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av_fifo_size(buf->fifo) / sizeof(AVFilterBufferRef *) >= 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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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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int av_buffersink_get_buffer_ref(AVFilterContext *ctx,
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AVFilterBufferRef **bufref, 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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*bufref = NULL;
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av_assert0( !strcmp(ctx->filter->name, "buffersink")
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|| !strcmp(ctx->filter->name, "abuffersink")
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|| !strcmp(ctx->filter->name, "ffbuffersink")
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|| !strcmp(ctx->filter->name, "ffabuffersink"));
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/* no picref available, fetch it from the filterchain */
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if (!av_fifo_size(buf->fifo)) {
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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 (!av_fifo_size(buf->fifo))
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return AVERROR(EINVAL);
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if (flags & AV_BUFFERSINK_FLAG_PEEK)
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*bufref = *((AVFilterBufferRef **)av_fifo_peek2(buf->fifo, 0));
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else
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av_fifo_generic_read(buf->fifo, bufref, sizeof(*bufref), NULL);
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return 0;
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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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int av_buffersink_poll_frame(AVFilterContext *ctx)
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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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av_assert0( !strcmp(ctx->filter->name, "buffersink")
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|| !strcmp(ctx->filter->name, "abuffersink")
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|| !strcmp(ctx->filter->name, "ffbuffersink")
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|| !strcmp(ctx->filter->name, "ffabuffersink"));
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return av_fifo_size(buf->fifo)/sizeof(AVFilterBufferRef *) + ff_poll_frame(inlink);
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}
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static av_cold int vsink_init(AVFilterContext *ctx, const char *args, 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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if (params && params->pixel_fmts) {
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const int *pixel_fmts = params->pixel_fmts;
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buf->pixel_fmts = ff_copy_int_list(pixel_fmts);
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if (!buf->pixel_fmts)
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return AVERROR(ENOMEM);
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}
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return common_init(ctx);
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}
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static av_cold void vsink_uninit(AVFilterContext *ctx)
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{
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BufferSinkContext *buf = ctx->priv;
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av_freep(&buf->pixel_fmts);
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common_uninit(ctx);
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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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if (buf->pixel_fmts)
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ff_set_common_formats(ctx, ff_make_format_list(buf->pixel_fmts));
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else
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ff_default_query_formats(ctx);
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return 0;
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}
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static const AVFilterPad ffbuffersink_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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.min_perms = AV_PERM_READ | AV_PERM_PRESERVE,
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},
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{ NULL },
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};
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AVFilter avfilter_vsink_ffbuffersink = {
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.name = "ffbuffersink",
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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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.init_opaque = vsink_init,
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.uninit = vsink_uninit,
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.query_formats = vsink_query_formats,
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.inputs = ffbuffersink_inputs,
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.outputs = NULL,
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};
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static const AVFilterPad buffersink_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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.min_perms = AV_PERM_READ | AV_PERM_PRESERVE,
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},
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{ NULL },
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};
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AVFilter avfilter_vsink_buffersink = {
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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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.init_opaque = vsink_init,
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.uninit = vsink_uninit,
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.query_formats = vsink_query_formats,
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.inputs = buffersink_inputs,
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.outputs = NULL,
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};
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static int64_t *concat_channels_lists(const int64_t *layouts, const int *counts)
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{
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int nb_layouts = 0, nb_counts = 0, i;
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int64_t *list;
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if (layouts)
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for (; layouts[nb_layouts] != -1; nb_layouts++);
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if (counts)
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for (; counts[nb_counts] != -1; nb_counts++);
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if (nb_counts > INT_MAX - 1 - nb_layouts)
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return NULL;
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if (!(list = av_calloc(nb_layouts + nb_counts + 1, sizeof(*list))))
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return NULL;
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for (i = 0; i < nb_layouts; i++)
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list[i] = layouts[i];
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for (i = 0; i < nb_counts; i++)
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list[nb_layouts + i] = FF_COUNT2LAYOUT(counts[i]);
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list[nb_layouts + nb_counts] = -1;
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return list;
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}
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static av_cold int asink_init(AVFilterContext *ctx, const char *args, 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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if (params && params->sample_fmts) {
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buf->sample_fmts = ff_copy_int_list (params->sample_fmts);
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if (!buf->sample_fmts)
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return AVERROR(ENOMEM);
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}
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if (params && (params->channel_layouts || params->channel_counts)) {
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if (params->all_channel_counts) {
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av_log(ctx, AV_LOG_ERROR,
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"Conflicting all_channel_counts and list in parameters\n");
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return AVERROR(EINVAL);
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}
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buf->channel_layouts = concat_channels_lists(params->channel_layouts,
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params->channel_counts);
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if (!buf->channel_layouts)
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return AVERROR(ENOMEM);
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}
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if (params)
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buf->all_channel_counts = params->all_channel_counts;
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return common_init(ctx);
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}
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static av_cold void asink_uninit(AVFilterContext *ctx)
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{
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BufferSinkContext *buf = ctx->priv;
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av_freep(&buf->sample_fmts);
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av_freep(&buf->channel_layouts);
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common_uninit(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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if (buf->sample_fmts) {
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if (!(formats = ff_make_format_list(buf->sample_fmts)))
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return AVERROR(ENOMEM);
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ff_set_common_formats(ctx, formats);
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}
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if (buf->channel_layouts || buf->all_channel_counts) {
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layouts = buf->all_channel_counts ? ff_all_channel_counts() :
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avfilter_make_format64_list(buf->channel_layouts);
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if (!layouts)
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return AVERROR(ENOMEM);
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ff_set_common_channel_layouts(ctx, layouts);
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}
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return 0;
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}
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static const AVFilterPad ffabuffersink_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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.min_perms = AV_PERM_READ | AV_PERM_PRESERVE,
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},
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{ NULL },
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};
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AVFilter avfilter_asink_ffabuffersink = {
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.name = "ffabuffersink",
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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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.init_opaque = asink_init,
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.uninit = asink_uninit,
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.priv_size = sizeof(BufferSinkContext),
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.query_formats = asink_query_formats,
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.inputs = ffabuffersink_inputs,
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.outputs = NULL,
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};
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static const AVFilterPad abuffersink_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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.min_perms = AV_PERM_READ | AV_PERM_PRESERVE,
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},
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{ NULL },
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};
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AVFilter avfilter_asink_abuffersink = {
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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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.init_opaque = asink_init,
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.uninit = asink_uninit,
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.priv_size = sizeof(BufferSinkContext),
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.query_formats = asink_query_formats,
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.inputs = abuffersink_inputs,
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.outputs = NULL,
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};
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/* Libav compatibility API */
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extern AVFilter avfilter_vsink_buffer;
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extern AVFilter avfilter_asink_abuffer;
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int av_buffersink_read(AVFilterContext *ctx, AVFilterBufferRef **buf)
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{
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AVFilterBufferRef *tbuf;
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int ret;
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if (ctx->filter-> inputs[0].start_frame ==
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avfilter_vsink_buffer. inputs[0].start_frame ||
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ctx->filter-> inputs[0].filter_frame ==
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avfilter_asink_abuffer.inputs[0].filter_frame)
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return ff_buffersink_read_compat(ctx, buf);
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av_assert0(ctx->filter-> inputs[0].end_frame ==
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avfilter_vsink_ffbuffersink. inputs[0].end_frame ||
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ctx->filter-> inputs[0].filter_frame ==
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avfilter_asink_ffabuffersink.inputs[0].filter_frame);
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ret = av_buffersink_get_buffer_ref(ctx, &tbuf,
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buf ? 0 : AV_BUFFERSINK_FLAG_PEEK);
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if (!buf)
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return ret >= 0;
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if (ret < 0)
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return ret;
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*buf = tbuf;
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return 0;
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}
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int av_buffersink_read_samples(AVFilterContext *ctx, AVFilterBufferRef **buf,
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int nb_samples)
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{
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BufferSinkContext *sink = ctx->priv;
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int ret = 0, have_samples = 0, need_samples;
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AVFilterBufferRef *tbuf, *in_buf;
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AVFilterLink *link = ctx->inputs[0];
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int nb_channels = av_get_channel_layout_nb_channels(link->channel_layout);
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if (ctx->filter-> inputs[0].filter_frame ==
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avfilter_asink_abuffer.inputs[0].filter_frame)
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return ff_buffersink_read_samples_compat(ctx, buf, nb_samples);
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av_assert0(ctx->filter-> inputs[0].filter_frame ==
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avfilter_asink_ffabuffersink.inputs[0].filter_frame);
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tbuf = ff_get_audio_buffer(link, AV_PERM_WRITE, nb_samples);
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if (!tbuf)
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return AVERROR(ENOMEM);
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while (have_samples < nb_samples) {
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ret = av_buffersink_get_buffer_ref(ctx, &in_buf,
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AV_BUFFERSINK_FLAG_PEEK);
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if (ret < 0) {
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if (ret == AVERROR_EOF && have_samples) {
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nb_samples = have_samples;
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ret = 0;
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}
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break;
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}
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need_samples = FFMIN(in_buf->audio->nb_samples,
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nb_samples - have_samples);
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av_samples_copy(tbuf->extended_data, in_buf->extended_data,
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have_samples, 0, need_samples,
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nb_channels, in_buf->format);
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have_samples += need_samples;
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if (need_samples < in_buf->audio->nb_samples) {
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in_buf->audio->nb_samples -= need_samples;
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av_samples_copy(in_buf->extended_data, in_buf->extended_data,
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0, need_samples, in_buf->audio->nb_samples,
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nb_channels, in_buf->format);
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} else {
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av_buffersink_get_buffer_ref(ctx, &in_buf, 0);
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avfilter_unref_buffer(in_buf);
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}
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}
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tbuf->audio->nb_samples = have_samples;
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if (ret < 0) {
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av_assert0(!av_fifo_size(sink->fifo));
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if (have_samples)
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add_buffer_ref(ctx, tbuf);
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else
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avfilter_unref_buffer(tbuf);
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return ret;
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}
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*buf = tbuf;
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return 0;
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}
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