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Shortcut decoder initialization when only using it for capability testing

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This commit is contained in:
Cameron Gutman
2019-02-12 18:42:53 -08:00
parent df567b405a
commit 947970e07b
6 changed files with 45 additions and 20 deletions
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42
app/streaming/video/ffmpeg.cpp
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@@ -59,7 +59,7 @@ enum AVPixelFormat FFmpegVideoDecoder::ffGetFormat(AVCodecContext* context,
return AV_PIX_FMT_NONE;
}
FFmpegVideoDecoder::FFmpegVideoDecoder()
FFmpegVideoDecoder::FFmpegVideoDecoder(bool testOnly)
: m_VideoDecoderCtx(nullptr),
m_DecodeBuffer(1024 * 1024, 0),
m_HwDecodeCfg(nullptr),
@@ -68,7 +68,8 @@ FFmpegVideoDecoder::FFmpegVideoDecoder()
m_Pacer(nullptr),
m_LastFrameNumber(0),
m_StreamFps(0),
m_NeedsSpsFixup(false)
m_NeedsSpsFixup(false),
m_TestOnly(testOnly)
{
av_init_packet(&m_Pkt);
@@ -105,13 +106,22 @@ void FFmpegVideoDecoder::reset()
delete m_Renderer;
m_Renderer = nullptr;
logVideoStats(m_GlobalVideoStats, "Global video stats");
if (!m_TestOnly) {
logVideoStats(m_GlobalVideoStats, "Global video stats");
}
else {
// Test-only decoders can't have any frames submitted
SDL_assert(m_GlobalVideoStats.totalFrames == 0);
}
}
bool FFmpegVideoDecoder::completeInitialization(AVCodec* decoder, SDL_Window* window,
int videoFormat, int width, int height,
int maxFps, bool enableFramePacing, bool testOnly)
int maxFps, bool enableFramePacing, bool testFrame)
{
// In test-only mode, we should only see test frames
SDL_assert(!m_TestOnly || testFrame);
auto vsyncConstraint = m_Renderer->getFramePacingConstraint();
if (vsyncConstraint == IFFmpegRenderer::PACING_FORCE_OFF && enableFramePacing) {
SDL_LogInfo(SDL_LOG_CATEGORY_APPLICATION,
@@ -129,9 +139,13 @@ bool FFmpegVideoDecoder::completeInitialization(AVCodec* decoder, SDL_Window* wi
}
m_StreamFps = maxFps;
m_Pacer = new Pacer(m_Renderer, &m_ActiveWndVideoStats);
if (!m_Pacer->initialize(window, maxFps, enableFramePacing)) {
return false;
// Don't bother initializing Pacer if we're not actually going to render
if (!testFrame) {
m_Pacer = new Pacer(m_Renderer, &m_ActiveWndVideoStats);
if (!m_Pacer->initialize(window, maxFps, enableFramePacing)) {
return false;
}
}
m_VideoDecoderCtx = avcodec_alloc_context3(decoder);
@@ -189,7 +203,7 @@ bool FFmpegVideoDecoder::completeInitialization(AVCodec* decoder, SDL_Window* wi
// our minds on the selected video codec, so we'll do a trial run
// now to see if things will actually work when the video stream
// comes in.
if (testOnly) {
if (testFrame) {
if (videoFormat & VIDEO_FORMAT_MASK_H264) {
m_Pkt.data = (uint8_t*)k_H264TestFrame;
m_Pkt.size = sizeof(k_H264TestFrame);
@@ -380,7 +394,7 @@ bool FFmpegVideoDecoder::initialize(
m_Renderer = new SdlRenderer();
if (vds != StreamingPreferences::VDS_FORCE_HARDWARE &&
m_Renderer->initialize(window, videoFormat, width, height, maxFps, enableVsync) &&
completeInitialization(decoder, window, videoFormat, width, height, maxFps, enableFramePacing, false)) {
completeInitialization(decoder, window, videoFormat, width, height, maxFps, enableFramePacing, m_TestOnly)) {
return true;
}
else {
@@ -397,7 +411,13 @@ bool FFmpegVideoDecoder::initialize(
m_HwDecodeCfg = config;
// Initialize the hardware codec and submit a test frame if the renderer needs it
if (m_Renderer->initialize(window, videoFormat, width, height, maxFps, enableVsync) &&
completeInitialization(decoder, window, videoFormat, width, height, maxFps, enableFramePacing, m_Renderer->needsTestFrame())) {
completeInitialization(decoder, window, videoFormat, width, height, maxFps, enableFramePacing, m_TestOnly || m_Renderer->needsTestFrame())) {
if (m_TestOnly) {
// This decoder is only for testing capabilities, so don't bother
// creating a usable renderer
return true;
}
if (m_Renderer->needsTestFrame()) {
// The test worked, so now let's initialize it for real
reset();
@@ -472,6 +492,8 @@ int FFmpegVideoDecoder::submitDecodeUnit(PDECODE_UNIT du)
PLENTRY entry = du->bufferList;
int err;
SDL_assert(!m_TestOnly);
if (!m_LastFrameNumber) {
m_ActiveWndVideoStats.measurementStartTimestamp = SDL_GetTicks();
m_LastFrameNumber = du->frameNumber;