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https://github.com/FFmpeg/FFmpeg.git
synced 2025-01-08 13:22:53 +02:00
avdevice/lavfi: output wrapped AVFrames
This avoids an extra copy of potentially quite big video frames. Instead of copying the entire frames data into a rawvideo packet it packs the frame into a wrapped avframe packet and passes it through as-is. Unfortunately, wrapped avframes are set up to be video frames, so the audio frames continue to be copied. Additionally, this enabled passing through video frames that previously were impossible to process, like hardware frames or other special formats that couldn't be packed into a rawvideo packet.
This commit is contained in:
Timo Rothenpieler
parent
63ce42019c
commit
6ca43a9675
@ -54,32 +54,10 @@ typedef struct {
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int *sink_eof;
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int *stream_sink_map;
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int *sink_stream_subcc_map;
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AVFrame *decoded_frame;
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int nb_sinks;
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AVPacket subcc_packet;
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} LavfiContext;
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static int *create_all_formats(int n)
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{
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int i, j, *fmts, count = 0;
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for (i = 0; i < n; i++) {
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
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if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
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count++;
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}
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if (!(fmts = av_malloc_array(count + 1, sizeof(*fmts))))
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return NULL;
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for (j = 0, i = 0; i < n; i++) {
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(i);
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if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
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fmts[j++] = i;
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}
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fmts[j] = AV_PIX_FMT_NONE;
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return fmts;
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}
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av_cold static int lavfi_read_close(AVFormatContext *avctx)
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{
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LavfiContext *lavfi = avctx->priv_data;
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@ -90,7 +68,6 @@ av_cold static int lavfi_read_close(AVFormatContext *avctx)
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av_freep(&lavfi->sink_stream_subcc_map);
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av_freep(&lavfi->sinks);
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avfilter_graph_free(&lavfi->graph);
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av_frame_free(&lavfi->decoded_frame);
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return 0;
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}
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@ -125,15 +102,11 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
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LavfiContext *lavfi = avctx->priv_data;
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AVFilterInOut *input_links = NULL, *output_links = NULL, *inout;
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const AVFilter *buffersink, *abuffersink;
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int *pix_fmts = create_all_formats(AV_PIX_FMT_NB);
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enum AVMediaType type;
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int ret = 0, i, n;
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#define FAIL(ERR) { ret = ERR; goto end; }
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if (!pix_fmts)
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FAIL(AVERROR(ENOMEM));
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buffersink = avfilter_get_by_name("buffersink");
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abuffersink = avfilter_get_by_name("abuffersink");
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@ -264,8 +237,6 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
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ret = avfilter_graph_create_filter(&sink, buffersink,
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inout->name, NULL,
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NULL, lavfi->graph);
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if (ret >= 0)
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ret = av_opt_set_int_list(sink, "pix_fmts", pix_fmts, AV_PIX_FMT_NONE, AV_OPT_SEARCH_CHILDREN);
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if (ret < 0)
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goto end;
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} else if (type == AVMEDIA_TYPE_AUDIO) {
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@ -321,15 +292,12 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
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avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
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par->codec_type = av_buffersink_get_type(sink);
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if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
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int64_t probesize;
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par->codec_id = AV_CODEC_ID_RAWVIDEO;
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par->codec_id = AV_CODEC_ID_WRAPPED_AVFRAME;
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par->format = av_buffersink_get_format(sink);
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par->width = av_buffersink_get_w(sink);
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par->height = av_buffersink_get_h(sink);
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probesize = par->width * par->height * 30 *
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av_get_padded_bits_per_pixel(av_pix_fmt_desc_get(par->format));
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avctx->probesize = FFMAX(avctx->probesize, probesize);
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st ->sample_aspect_ratio =
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avctx->probesize = FFMAX(avctx->probesize, sizeof(AVFrame) * 30);
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st ->sample_aspect_ratio =
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par->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(sink);
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} else if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
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par->sample_rate = av_buffersink_get_sample_rate(sink);
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@ -348,11 +316,7 @@ av_cold static int lavfi_read_header(AVFormatContext *avctx)
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if ((ret = create_subcc_streams(avctx)) < 0)
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goto end;
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if (!(lavfi->decoded_frame = av_frame_alloc()))
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FAIL(AVERROR(ENOMEM));
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end:
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av_free(pix_fmts);
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avfilter_inout_free(&input_links);
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avfilter_inout_free(&output_links);
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return ret;
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@ -378,15 +342,20 @@ static int create_subcc_packet(AVFormatContext *avctx, AVFrame *frame,
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return 0;
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}
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static void lavfi_free_frame(void *opaque, uint8_t *data)
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{
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AVFrame *frame = (AVFrame*)data;
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av_frame_free(&frame);
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}
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static int lavfi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
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{
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LavfiContext *lavfi = avctx->priv_data;
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double min_pts = DBL_MAX;
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int stream_idx, min_pts_sink_idx = 0;
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AVFrame *frame = lavfi->decoded_frame;
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AVFrame *frame;
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AVDictionary *frame_metadata;
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int ret, i;
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int size = 0;
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AVStream *st;
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if (lavfi->subcc_packet.size) {
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@ -394,12 +363,15 @@ static int lavfi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
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return pkt->size;
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}
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frame = av_frame_alloc();
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if (!frame)
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return AVERROR(ENOMEM);
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/* iterate through all the graph sinks. Select the sink with the
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* minimum PTS */
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for (i = 0; i < lavfi->nb_sinks; i++) {
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AVRational tb = av_buffersink_get_time_base(lavfi->sinks[i]);
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double d;
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int ret;
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if (lavfi->sink_eof[i])
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continue;
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@ -411,7 +383,7 @@ static int lavfi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
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lavfi->sink_eof[i] = 1;
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continue;
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} else if (ret < 0)
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return ret;
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goto fail;
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d = av_rescale_q_rnd(frame->pts, tb, AV_TIME_BASE_Q, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
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ff_dlog(avctx, "sink_idx:%d time:%f\n", i, d);
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av_frame_unref(frame);
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@ -421,8 +393,10 @@ static int lavfi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
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min_pts_sink_idx = i;
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}
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}
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if (min_pts == DBL_MAX)
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return AVERROR_EOF;
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if (min_pts == DBL_MAX) {
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ret = AVERROR_EOF;
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goto fail;
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}
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ff_dlog(avctx, "min_pts_sink_idx:%i\n", min_pts_sink_idx);
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@ -431,15 +405,19 @@ static int lavfi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
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st = avctx->streams[stream_idx];
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if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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size = av_image_get_buffer_size(frame->format, frame->width, frame->height, 1);
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if ((ret = av_new_packet(pkt, size)) < 0)
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pkt->buf = av_buffer_create((uint8_t*)frame, sizeof(*frame),
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&lavfi_free_frame, NULL, 0);
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if (!pkt->buf) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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av_image_copy_to_buffer(pkt->data, size, (const uint8_t **)frame->data, frame->linesize,
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frame->format, frame->width, frame->height, 1);
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pkt->data = pkt->buf->data;
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pkt->size = pkt->buf->size;
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pkt->flags |= AV_PKT_FLAG_TRUSTED;
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} else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
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size = frame->nb_samples * av_get_bytes_per_sample(frame->format) *
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frame->ch_layout.nb_channels;
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int size = frame->nb_samples * av_get_bytes_per_sample(frame->format) *
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frame->ch_layout.nb_channels;
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if ((ret = av_new_packet(pkt, size)) < 0)
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goto fail;
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memcpy(pkt->data, frame->data[0], size);
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@ -468,10 +446,13 @@ static int lavfi_read_packet(AVFormatContext *avctx, AVPacket *pkt)
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pkt->stream_index = stream_idx;
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pkt->pts = frame->pts;
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pkt->pos = frame->pkt_pos;
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av_frame_unref(frame);
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return size;
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if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
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av_frame_free(&frame);
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return pkt->size;
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fail:
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av_frame_unref(frame);
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av_frame_free(&frame);
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return ret;
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}
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@ -30,7 +30,7 @@
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#include "version_major.h"
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#define LIBAVDEVICE_VERSION_MINOR 8
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#define LIBAVDEVICE_VERSION_MICRO 100
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#define LIBAVDEVICE_VERSION_MICRO 101
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#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
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LIBAVDEVICE_VERSION_MINOR, \
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@ -1,4 +1,5 @@
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pts=0
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pts=0|
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pts=400
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pts=800|tag:lavfi.cropdetect.x1=0|tag:lavfi.cropdetect.x2=719|tag:lavfi.cropdetect.y1=61|tag:lavfi.cropdetect.y2=424|tag:lavfi.cropdetect.w=720|tag:lavfi.cropdetect.h=352|tag:lavfi.cropdetect.x=0|tag:lavfi.cropdetect.y=68
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pts=1200|tag:lavfi.cropdetect.x1=0|tag:lavfi.cropdetect.x2=719|tag:lavfi.cropdetect.y1=61|tag:lavfi.cropdetect.y2=424|tag:lavfi.cropdetect.w=720|tag:lavfi.cropdetect.h=352|tag:lavfi.cropdetect.x=0|tag:lavfi.cropdetect.y=68
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