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https://github.com/FFmpeg/FFmpeg.git
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lavfi/af_amix: mostly fix scheduling.
This commit is contained in:
Nicolas George
parent
f53c4b6a18
commit
a08fb3983f
@ -44,9 +44,8 @@
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#include "formats.h"
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#include "internal.h"
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#define INPUT_OFF 0 /**< input has reached EOF */
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#define INPUT_ON 1 /**< input is active */
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#define INPUT_INACTIVE 2 /**< input is on, but is currently inactive */
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#define INPUT_EOF 2 /**< input has reached EOF (may still be active) */
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#define DURATION_LONGEST 0
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#define DURATION_SHORTEST 1
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@ -209,7 +208,7 @@ static void calculate_scales(MixContext *s, int nb_samples)
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}
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for (i = 0; i < s->nb_inputs; i++) {
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if (s->input_state[i] == INPUT_ON)
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if (s->input_state[i] & INPUT_ON)
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s->input_scale[i] = 1.0f / s->scale_norm;
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else
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s->input_scale[i] = 0.0f;
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@ -264,15 +263,52 @@ static int config_output(AVFilterLink *outlink)
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return 0;
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}
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static int calc_active_inputs(MixContext *s);
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/**
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* Read samples from the input FIFOs, mix, and write to the output link.
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*/
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static int output_frame(AVFilterLink *outlink, int nb_samples)
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static int output_frame(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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MixContext *s = ctx->priv;
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AVFrame *out_buf, *in_buf;
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int i;
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int nb_samples, ns, ret, i;
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ret = calc_active_inputs(s);
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if (ret < 0)
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return ret;
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if (s->input_state[0] & INPUT_ON) {
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/* first input live: use the corresponding frame size */
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nb_samples = frame_list_next_frame_size(s->frame_list);
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for (i = 1; i < s->nb_inputs; i++) {
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if (s->input_state[i] & INPUT_ON) {
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ns = av_audio_fifo_size(s->fifos[i]);
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if (ns < nb_samples) {
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if (!(s->input_state[i] & INPUT_EOF))
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/* unclosed input with not enough samples */
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return 0;
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/* closed input to drain */
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nb_samples = ns;
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}
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}
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}
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} else {
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/* first input closed: use the available samples */
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nb_samples = INT_MAX;
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for (i = 1; i < s->nb_inputs; i++) {
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if (s->input_state[i] & INPUT_ON) {
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ns = av_audio_fifo_size(s->fifos[i]);
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nb_samples = FFMIN(nb_samples, ns);
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}
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}
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if (nb_samples == INT_MAX)
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return AVERROR_EOF;
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}
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s->next_pts = frame_list_next_pts(s->frame_list);
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frame_list_remove_samples(s->frame_list, nb_samples);
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calculate_scales(s, nb_samples);
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@ -287,7 +323,7 @@ static int output_frame(AVFilterLink *outlink, int nb_samples)
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}
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for (i = 0; i < s->nb_inputs; i++) {
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if (s->input_state[i] == INPUT_ON) {
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if (s->input_state[i] & INPUT_ON) {
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int planes, plane_size, p;
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av_audio_fifo_read(s->fifos[i], (void **)in_buf->extended_data,
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@ -313,29 +349,6 @@ static int output_frame(AVFilterLink *outlink, int nb_samples)
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return ff_filter_frame(outlink, out_buf);
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}
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/**
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* Returns the smallest number of samples available in the input FIFOs other
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* than that of the first input.
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*/
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static int get_available_samples(MixContext *s)
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{
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int i;
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int available_samples = INT_MAX;
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av_assert0(s->nb_inputs > 1);
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for (i = 1; i < s->nb_inputs; i++) {
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int nb_samples;
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if (s->input_state[i] == INPUT_OFF)
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continue;
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nb_samples = av_audio_fifo_size(s->fifos[i]);
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available_samples = FFMIN(available_samples, nb_samples);
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}
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if (available_samples == INT_MAX)
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return 0;
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return available_samples;
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}
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/**
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* Requests a frame, if needed, from each input link other than the first.
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*/
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@ -348,19 +361,21 @@ static int request_samples(AVFilterContext *ctx, int min_samples)
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for (i = 1; i < s->nb_inputs; i++) {
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ret = 0;
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if (s->input_state[i] == INPUT_OFF)
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if (!(s->input_state[i] & INPUT_ON))
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continue;
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while (!ret && av_audio_fifo_size(s->fifos[i]) < min_samples)
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ret = ff_request_frame(ctx->inputs[i]);
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if (av_audio_fifo_size(s->fifos[i]) >= min_samples)
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continue;
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ret = ff_request_frame(ctx->inputs[i]);
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if (ret == AVERROR_EOF) {
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s->input_state[i] |= INPUT_EOF;
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if (av_audio_fifo_size(s->fifos[i]) == 0) {
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s->input_state[i] = INPUT_OFF;
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s->input_state[i] = 0;
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continue;
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}
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} else if (ret < 0)
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return ret;
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}
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return 0;
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return output_frame(ctx->outputs[0]);
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}
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/**
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@ -374,11 +389,11 @@ static int calc_active_inputs(MixContext *s)
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int i;
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int active_inputs = 0;
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for (i = 0; i < s->nb_inputs; i++)
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active_inputs += !!(s->input_state[i] != INPUT_OFF);
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active_inputs += !!(s->input_state[i] & INPUT_ON);
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s->active_inputs = active_inputs;
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if (!active_inputs ||
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(s->duration_mode == DURATION_FIRST && s->input_state[0] == INPUT_OFF) ||
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(s->duration_mode == DURATION_FIRST && !(s->input_state[0] & INPUT_ON)) ||
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(s->duration_mode == DURATION_SHORTEST && active_inputs != s->nb_inputs))
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return AVERROR_EOF;
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return 0;
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@ -389,66 +404,30 @@ static int request_frame(AVFilterLink *outlink)
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AVFilterContext *ctx = outlink->src;
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MixContext *s = ctx->priv;
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int ret;
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int wanted_samples, available_samples;
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int wanted_samples;
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ret = calc_active_inputs(s);
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if (ret < 0)
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return ret;
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if (s->input_state[0] == INPUT_OFF) {
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ret = request_samples(ctx, 1);
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if (ret < 0)
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return ret;
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ret = calc_active_inputs(s);
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if (ret < 0)
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return ret;
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available_samples = get_available_samples(s);
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if (!available_samples)
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return AVERROR(EAGAIN);
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return output_frame(outlink, available_samples);
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}
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if (!(s->input_state[0] & INPUT_ON))
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return request_samples(ctx, 1);
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if (s->frame_list->nb_frames == 0) {
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ret = ff_request_frame(ctx->inputs[0]);
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if (ret == AVERROR_EOF) {
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s->input_state[0] = INPUT_OFF;
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s->input_state[0] = 0;
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if (s->nb_inputs == 1)
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return AVERROR_EOF;
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else
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return AVERROR(EAGAIN);
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} else if (ret < 0)
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return ret;
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return output_frame(ctx->outputs[0]);
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}
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return ret;
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}
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av_assert0(s->frame_list->nb_frames > 0);
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wanted_samples = frame_list_next_frame_size(s->frame_list);
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if (s->active_inputs > 1) {
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ret = request_samples(ctx, wanted_samples);
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if (ret < 0)
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return ret;
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ret = calc_active_inputs(s);
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if (ret < 0)
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return ret;
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}
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if (s->active_inputs > 1) {
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available_samples = get_available_samples(s);
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if (!available_samples)
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return AVERROR(EAGAIN);
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available_samples = FFMIN(available_samples, wanted_samples);
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} else {
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available_samples = wanted_samples;
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}
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s->next_pts = frame_list_next_pts(s->frame_list);
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frame_list_remove_samples(s->frame_list, available_samples);
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return output_frame(outlink, available_samples);
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return request_samples(ctx, wanted_samples);
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
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@ -478,6 +457,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
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ret = av_audio_fifo_write(s->fifos[i], (void **)buf->extended_data,
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buf->nb_samples);
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av_frame_free(&buf);
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return output_frame(outlink);
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fail:
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av_frame_free(&buf);
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