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ffmpeg/libavfilter/buffersink.c

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/*
* 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/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#define FF_INTERNAL_FIELDS 1
#include "framequeue.h"
#include "audio.h"
#include "avfilter.h"
#include "buffersink.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct BufferSinkContext {
const AVClass *class;
unsigned warning_limit;
/* only used for video */
enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats
int pixel_fmts_size;
/* only used for audio */
enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats
int sample_fmts_size;
#if FF_API_OLD_CHANNEL_LAYOUT
int64_t *channel_layouts; ///< list of accepted channel layouts
int channel_layouts_size;
int *channel_counts; ///< list of accepted channel counts
int channel_counts_size;
#endif
char *channel_layouts_str; ///< list of accepted channel layouts
int all_channel_counts;
int *sample_rates; ///< list of accepted sample rates
int sample_rates_size;
AVFrame *peeked_frame;
} BufferSinkContext;
#define NB_ITEMS(list) (list ## _size / sizeof(*list))
#if FF_API_OLD_CHANNEL_LAYOUT
static void cleanup_redundant_layouts(AVFilterContext *ctx)
{
BufferSinkContext *buf = ctx->priv;
int nb_layouts = NB_ITEMS(buf->channel_layouts);
int nb_counts = NB_ITEMS(buf->channel_counts);
uint64_t counts = 0;
int i, lc, n;
for (i = 0; i < nb_counts; i++)
if (buf->channel_counts[i] < 64)
counts |= (uint64_t)1 << buf->channel_counts[i];
for (i = lc = 0; i < nb_layouts; i++) {
n = av_popcount64(buf->channel_layouts[i]);
if (n < 64 && (counts & ((uint64_t)1 << n)))
av_log(ctx, AV_LOG_WARNING,
"Removing channel layout 0x%"PRIx64", redundant with %d channels\n",
buf->channel_layouts[i], n);
else
buf->channel_layouts[lc++] = buf->channel_layouts[i];
}
buf->channel_layouts_size = lc * sizeof(*buf->channel_layouts);
}
#endif
int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame)
{
return av_buffersink_get_frame_flags(ctx, frame, 0);
}
static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
{
if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
buf->peeked_frame = in;
return out ? av_frame_ref(out, in) : 0;
} else {
av_assert1(out);
buf->peeked_frame = NULL;
av_frame_move_ref(out, in);
av_frame_free(&in);
return 0;
}
}
static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
{
BufferSinkContext *buf = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int status, ret;
AVFrame *cur_frame;
int64_t pts;
if (buf->peeked_frame)
return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);
while (1) {
ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
ff_inlink_consume_frame(inlink, &cur_frame);
if (ret < 0) {
return ret;
} else if (ret) {
/* TODO return the frame instead of copying it */
return return_or_keep_frame(buf, frame, cur_frame, flags);
} else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
return status;
} else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
return AVERROR(EAGAIN);
} else if (inlink->frame_wanted_out) {
ret = ff_filter_graph_run_once(ctx->graph);
if (ret < 0)
return ret;
} else {
ff_inlink_request_frame(inlink);
}
}
}
int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
{
return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
}
int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx,
AVFrame *frame, int nb_samples)
{
return get_frame_internal(ctx, frame, 0, nb_samples);
}
static av_cold int common_init(AVFilterContext *ctx)
{
BufferSinkContext *buf = ctx->priv;
buf->warning_limit = 100;
return 0;
}
static int activate(AVFilterContext *ctx)
{
BufferSinkContext *buf = ctx->priv;
if (buf->warning_limit &&
ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= 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;
}
/* The frame is queued, the rest is up to get_frame_internal */
return 0;
}
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
{
AVFilterLink *inlink = ctx->inputs[0];
inlink->min_samples = inlink->max_samples = frame_size;
}
#define MAKE_AVFILTERLINK_ACCESSOR(type, field) \
type av_buffersink_get_##field(const AVFilterContext *ctx) { \
av_assert0(ctx->filter->activate == activate); \
return ctx->inputs[0]->field; \
}
MAKE_AVFILTERLINK_ACCESSOR(enum AVMediaType , type )
MAKE_AVFILTERLINK_ACCESSOR(AVRational , time_base )
MAKE_AVFILTERLINK_ACCESSOR(int , format )
MAKE_AVFILTERLINK_ACCESSOR(AVRational , frame_rate )
MAKE_AVFILTERLINK_ACCESSOR(int , w )
MAKE_AVFILTERLINK_ACCESSOR(int , h )
MAKE_AVFILTERLINK_ACCESSOR(AVRational , sample_aspect_ratio)
#if FF_API_OLD_CHANNEL_LAYOUT
FF_DISABLE_DEPRECATION_WARNINGS
MAKE_AVFILTERLINK_ACCESSOR(uint64_t , channel_layout )
FF_ENABLE_DEPRECATION_WARNINGS
#endif
MAKE_AVFILTERLINK_ACCESSOR(int , sample_rate )
MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef * , hw_frames_ctx )
int av_buffersink_get_channels(const AVFilterContext *ctx)
{
av_assert0(ctx->filter->activate == activate);
return ctx->inputs[0]->ch_layout.nb_channels;
}
int av_buffersink_get_ch_layout(const AVFilterContext *ctx, AVChannelLayout *out)
{
AVChannelLayout ch_layout = { 0 };
int ret;
av_assert0(ctx->filter->activate == activate);
ret = av_channel_layout_copy(&ch_layout, &ctx->inputs[0]->ch_layout);
if (ret < 0)
return ret;
*out = ch_layout;
return 0;
}
#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 int asink_query_formats(AVFilterContext *ctx)
{
BufferSinkContext *buf = ctx->priv;
AVFilterFormats *formats = NULL;
AVChannelLayout layout = { 0 };
AVFilterChannelLayouts *layouts = NULL;
unsigned i;
int ret;
CHECK_LIST_SIZE(sample_fmts)
CHECK_LIST_SIZE(sample_rates)
#if FF_API_OLD_CHANNEL_LAYOUT
CHECK_LIST_SIZE(channel_layouts)
CHECK_LIST_SIZE(channel_counts)
#endif
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 (
#if FF_API_OLD_CHANNEL_LAYOUT
buf->channel_layouts_size || buf->channel_counts_size ||
#endif
buf->channel_layouts_str || buf->all_channel_counts) {
#if FF_API_OLD_CHANNEL_LAYOUT
cleanup_redundant_layouts(ctx);
for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
if ((ret = av_channel_layout_from_mask(&layout, buf->channel_layouts[i])) < 0 ||
(ret = ff_add_channel_layout(&layouts, &layout) < 0))
return ret;
for (i = 0; i < NB_ITEMS(buf->channel_counts); i++) {
layout = FF_COUNT2LAYOUT(buf->channel_counts[i]);
if ((ret = ff_add_channel_layout(&layouts, &layout)) < 0)
return ret;
}
#endif
if (buf->channel_layouts_str) {
const char *cur = buf->channel_layouts_str;
#if FF_API_OLD_CHANNEL_LAYOUT
if (layouts)
av_log(ctx, AV_LOG_WARNING,
"Conflicting ch_layouts and list of channel_counts/channel_layouts. Ignoring the former\n");
else
#endif
while (cur) {
char *next = strchr(cur, '|');
if (next)
*next++ = 0;
ret = av_channel_layout_from_string(&layout, cur);
if (ret < 0) {
av_log(ctx, AV_LOG_ERROR, "Error parsing channel layout: %s.\n", cur);
return ret;
}
ret = ff_add_channel_layout(&layouts, &layout);
av_channel_layout_uninit(&layout);
if (ret < 0)
return ret;
cur = next;
}
}
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_AUDIO_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 },
#if FF_API_OLD_CHANNEL_LAYOUT
{ "channel_layouts", "set the supported channel layouts (deprecated, use ch_layouts)",
OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS | AV_OPT_FLAG_DEPRECATED },
{ "channel_counts", "set the supported channel counts (deprecated, use ch_layouts)",
OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS | AV_OPT_FLAG_DEPRECATED },
#endif
{ "ch_layouts", "set a '|'-separated list of supported channel layouts",
OFFSET(channel_layouts_str), AV_OPT_TYPE_STRING, .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);
const 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 = common_init,
.activate = activate,
FILTER_INPUTS(ff_video_default_filterpad),
.outputs = NULL,
FILTER_QUERY_FUNC(vsink_query_formats),
};
const 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 = common_init,
.activate = activate,
FILTER_INPUTS(ff_audio_default_filterpad),
.outputs = NULL,
FILTER_QUERY_FUNC(asink_query_formats),
};
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