99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
#include "decoder.h"
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#include <libavformat/avformat.h>
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#include <libavutil/time.h>
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#include <SDL2/SDL_events.h>
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#include <SDL2/SDL_mutex.h>
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#include <SDL2/SDL_thread.h>
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#include <unistd.h>
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#include "events.h"
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#include "recorder.h"
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#include "video_buffer.h"
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#include "util/buffer_util.h"
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#include "util/log.h"
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// set the decoded frame as ready for rendering, and notify
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static void
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push_frame(struct decoder *decoder) {
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bool previous_frame_skipped;
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video_buffer_offer_decoded_frame(decoder->video_buffer,
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&previous_frame_skipped);
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if (previous_frame_skipped) {
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// the previous EVENT_NEW_FRAME will consume this frame
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return;
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}
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static SDL_Event new_frame_event = {
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.type = EVENT_NEW_FRAME,
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};
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SDL_PushEvent(&new_frame_event);
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}
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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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return true;
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}
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void
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decoder_close(struct decoder *decoder) {
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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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// the new decoding/encoding API has been introduced by:
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// <http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=7fc329e2dd6226dfecaa4a1d7adf353bf2773726>
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#ifdef SCRCPY_LAVF_HAS_NEW_ENCODING_DECODING_API
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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,
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decoder->video_buffer->decoding_frame);
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if (!ret) {
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// a frame was received
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push_frame(decoder);
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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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#else
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int got_picture;
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int len = avcodec_decode_video2(decoder->codec_ctx,
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decoder->video_buffer->decoding_frame,
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&got_picture,
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packet);
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if (len < 0) {
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LOGE("Could not decode video packet: %d", len);
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return false;
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}
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if (got_picture) {
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push_frame(decoder);
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}
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#endif
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return true;
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}
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void
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decoder_interrupt(struct decoder *decoder) {
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video_buffer_interrupt(decoder->video_buffer);
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}
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