mirror of
https://github.com/Genymobile/scrcpy.git
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14e83175a6
The video buffer took ownership of the producer frame (so that it could swap frames quickly). In order to support multiple sinks plugged to the decoder, the decoded frame must not be consumed by the display video buffer. Therefore, move the producer and consumer frames out of the video buffer, and use FFmpeg AVFrame refcounting to share ownership while avoiding copies.
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
#include "decoder.h"
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#include <libavformat/avformat.h>
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#include "events.h"
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#include "video_buffer.h"
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#include "util/log.h"
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void
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decoder_init(struct decoder *decoder, struct video_buffer *vb) {
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decoder->video_buffer = vb;
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}
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bool
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decoder_open(struct decoder *decoder, const AVCodec *codec) {
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decoder->codec_ctx = avcodec_alloc_context3(codec);
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if (!decoder->codec_ctx) {
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LOGC("Could not allocate decoder context");
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return false;
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}
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if (avcodec_open2(decoder->codec_ctx, codec, NULL) < 0) {
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LOGE("Could not open codec");
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avcodec_free_context(&decoder->codec_ctx);
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return false;
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}
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decoder->frame = av_frame_alloc();
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if (!decoder->frame) {
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LOGE("Could not create decoder frame");
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avcodec_close(decoder->codec_ctx);
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avcodec_free_context(&decoder->codec_ctx);
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return false;
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}
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return true;
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}
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void
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decoder_close(struct decoder *decoder) {
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av_frame_free(&decoder->frame);
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avcodec_close(decoder->codec_ctx);
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avcodec_free_context(&decoder->codec_ctx);
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}
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bool
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decoder_push(struct decoder *decoder, const AVPacket *packet) {
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int ret;
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if ((ret = avcodec_send_packet(decoder->codec_ctx, packet)) < 0) {
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LOGE("Could not send video packet: %d", ret);
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return false;
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}
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ret = avcodec_receive_frame(decoder->codec_ctx, decoder->frame);
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if (!ret) {
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// a frame was received
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bool ok = video_buffer_push(decoder->video_buffer, decoder->frame);
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// A frame lost should not make the whole pipeline fail. The error, if
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// any, is already logged.
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(void) ok;
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} else if (ret != AVERROR(EAGAIN)) {
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LOGE("Could not receive video frame: %d", ret);
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return false;
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}
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return true;
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}
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