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lavfi/buffersink: move to the new design.
This commit is contained in:
Nicolas George
parent
32c59a115d
commit
912969a33e
@ -23,12 +23,10 @@
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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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#define FF_INTERNAL_FIELDS 1
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@ -37,11 +35,11 @@
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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 "filters.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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@ -59,182 +57,74 @@ typedef struct BufferSinkContext {
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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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AVFrame *peeked_frame;
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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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static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
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{
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if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
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buf->peeked_frame = in;
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return out ? av_frame_ref(out, in) : 0;
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} else {
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av_assert1(out);
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buf->peeked_frame = NULL;
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av_frame_move_ref(out, in);
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av_frame_free(&in);
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return 0;
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}
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}
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static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
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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 peek_in_framequeue = 0, ret;
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int64_t frame_count;
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int status, ret;
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AVFrame *cur_frame;
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int64_t pts;
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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 peek_in_framequeue is true later, then ff_request_frame() and
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the ff_filter_graph_run_once() loop will take a frame from it and
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move it to the internal fifo, ending the global loop */
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av_assert0(!peek_in_framequeue);
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if (inlink->status_out)
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return inlink->status_out;
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peek_in_framequeue = ff_framequeue_queued_frames(&inlink->fifo) &&
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ff_framequeue_queued_samples(&inlink->fifo) >= inlink->min_samples;
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if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST) && !peek_in_framequeue)
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return AVERROR(EAGAIN);
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if ((ret = ff_request_frame(inlink)) < 0)
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if (buf->peeked_frame)
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return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);
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while (1) {
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ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
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ff_inlink_consume_frame(inlink, &cur_frame);
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if (ret < 0) {
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return ret;
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frame_count = inlink->frame_count_out;
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while (frame_count == inlink->frame_count_out) {
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} else if (ret) {
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/* TODO return the frame instead of copying it */
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return return_or_keep_frame(buf, frame, cur_frame, flags);
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} else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
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return status;
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} else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
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return AVERROR(EAGAIN);
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} else if (inlink->frame_wanted_out) {
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ret = ff_filter_graph_run_once(ctx->graph);
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if (ret < 0)
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return ret;
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}
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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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ff_inlink_request_frame(inlink);
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}
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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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int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
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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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return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
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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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return get_frame_internal(ctx, frame, 0, nb_samples);
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}
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AVBufferSinkParams *av_buffersink_params_alloc(void)
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@ -261,13 +151,24 @@ 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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static int activate(AVFilterContext *ctx)
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{
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BufferSinkContext *buf = ctx->priv;
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if (buf->warning_limit &&
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ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= 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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/* The frame is queued, the rest is up to get_frame_internal */
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return 0;
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}
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@ -281,7 +182,7 @@ void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
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#define MAKE_AVFILTERLINK_ACCESSOR(type, field) \
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type av_buffersink_get_##field(const AVFilterContext *ctx) { \
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av_assert0(ctx->filter->uninit == uninit); \
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av_assert0(ctx->filter->activate == activate); \
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return ctx->inputs[0]->field; \
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}
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@ -437,7 +338,6 @@ 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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@ -448,9 +348,9 @@ AVFilter ff_vsink_buffer = {
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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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.activate = activate,
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.inputs = avfilter_vsink_buffer_inputs,
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.outputs = NULL,
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};
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@ -459,7 +359,6 @@ 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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@ -470,9 +369,9 @@ AVFilter ff_asink_abuffer = {
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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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.activate = activate,
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.inputs = avfilter_asink_abuffer_inputs,
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.outputs = NULL,
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};
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