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Add H264_DECODER_HINT and HEVC_DECODER_HINT envvars to specify a decoder manually

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This commit is contained in:
Cameron Gutman 2020-01-26 14:40:48 -08:00
parent 956e6e3638
commit cede6ce8a9
1 changed files with 52 additions and 2 deletions
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54
app/streaming/video/ffmpeg.cpp
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@ -520,11 +520,61 @@ bool FFmpegVideoDecoder::tryInitializeRenderer(AVCodec* decoder,
bool FFmpegVideoDecoder::initialize(PDECODER_PARAMETERS params)
{
AVCodec* decoder;
// Increase log level until the first frame is decoded
av_log_set_level(AV_LOG_DEBUG);
// First try decoders that the user has manually specified via environment variables.
// These must output surfaces in one of the formats that the SDL renderer supports,
// which is currently:
// - AV_PIX_FMT_YUV420P (preferred)
// - AV_PIX_FMT_NV12
// - AV_PIX_FMT_NV21
// These formats should cover most/all decoders that output in a standard YUV format.
{
QString h264DecoderHint = qgetenv("H264_DECODER_HINT");
if (!h264DecoderHint.isEmpty() && (params->videoFormat & VIDEO_FORMAT_MASK_H264)) {
QByteArray decoderString = h264DecoderHint.toLocal8Bit();
AVCodec* customAvcDecoder = avcodec_find_decoder_by_name(decoderString.constData());
if (customAvcDecoder != nullptr &&
tryInitializeRenderer(customAvcDecoder, params, nullptr,
[]() -> IFFmpegRenderer* { return new SdlRenderer(); })) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Using custom H.264 decoder (H264_DECODER_HINT): %s",
decoderString.constData());
return true;
}
else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Custom H.264 decoder (H264_DECODER_HINT) failed to load: %s",
decoderString.constData());
}
}
}
{
QString hevcDecoderHint = qgetenv("HEVC_DECODER_HINT");
if (!hevcDecoderHint.isEmpty() && (params->videoFormat & VIDEO_FORMAT_MASK_H265)) {
QByteArray decoderString = hevcDecoderHint.toLocal8Bit();
AVCodec* customHevcDecoder = avcodec_find_decoder_by_name(decoderString.constData());
if (customHevcDecoder != nullptr &&
tryInitializeRenderer(customHevcDecoder, params, nullptr,
[]() -> IFFmpegRenderer* { return new SdlRenderer(); })) {
SDL_LogWarn(SDL_LOG_CATEGORY_APPLICATION,
"Using custom HEVC decoder (HEVC_DECODER_HINT): %s",
decoderString.constData());
return true;
}
else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,
"Custom HEVC decoder (HEVC_DECODER_HINT) failed to load: %s",
decoderString.constData());
}
}
}
AVCodec* decoder;
if (params->videoFormat & VIDEO_FORMAT_MASK_H264) {
decoder = avcodec_find_decoder(AV_CODEC_ID_H264);
}