codec: Fallback to CPU decoding if no compatible GPU format is found
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@ -17,6 +17,9 @@ extern "C" {
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namespace Tegra {
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namespace {
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constexpr AVPixelFormat PREFERRED_GPU_FMT = AV_PIX_FMT_NV12;
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constexpr AVPixelFormat PREFERRED_CPU_FMT = AV_PIX_FMT_YUV420P;
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AVPixelFormat GetGpuFormat(AVCodecContext* av_codec_ctx, const AVPixelFormat* pix_fmts) {
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for (const AVPixelFormat* p = pix_fmts; *p != AV_PIX_FMT_NONE; ++p) {
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if (*p == av_codec_ctx->pix_fmt) {
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@ -24,7 +27,9 @@ AVPixelFormat GetGpuFormat(AVCodecContext* av_codec_ctx, const AVPixelFormat* pi
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}
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}
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LOG_INFO(Service_NVDRV, "Could not find compatible GPU AV format, falling back to CPU");
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return AV_PIX_FMT_NONE;
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av_buffer_unref(&av_codec_ctx->hw_device_ctx);
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av_codec_ctx->pix_fmt = PREFERRED_CPU_FMT;
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return PREFERRED_CPU_FMT;
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}
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} // namespace
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@ -83,7 +88,12 @@ bool Codec::CreateGpuAvDevice() {
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#endif
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};
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for (const auto& type : GPU_DECODER_TYPES) {
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av_hwdevice_ctx_create(&av_gpu_decoder, type, nullptr, nullptr, 0);
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const int hwdevice_res = av_hwdevice_ctx_create(&av_gpu_decoder, type, nullptr, nullptr, 0);
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if (hwdevice_res < 0) {
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LOG_DEBUG(Service_NVDRV, "{} av_hwdevice_ctx_create failed {}",
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av_hwdevice_get_type_name(type), hwdevice_res);
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continue;
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}
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for (int i = 0;; i++) {
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const AVCodecHWConfig* config = avcodec_get_hw_config(av_codec, i);
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if (!config) {
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@ -110,36 +120,34 @@ void Codec::InitializeGpuDecoder() {
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ASSERT_MSG(hw_device_ctx, "av_buffer_ref failed");
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av_codec_ctx->hw_device_ctx = hw_device_ctx;
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av_codec_ctx->get_format = GetGpuFormat;
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using_gpu_decode = true;
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}
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void Codec::Initialize() {
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AVCodecID codec;
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switch (current_codec) {
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case NvdecCommon::VideoCodec::H264:
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codec = AV_CODEC_ID_H264;
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break;
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case NvdecCommon::VideoCodec::Vp9:
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codec = AV_CODEC_ID_VP9;
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break;
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default:
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UNIMPLEMENTED_MSG("Unknown codec {}", current_codec);
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return;
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}
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const AVCodecID codec = [&] {
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switch (current_codec) {
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case NvdecCommon::VideoCodec::H264:
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return AV_CODEC_ID_H264;
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case NvdecCommon::VideoCodec::Vp9:
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return AV_CODEC_ID_VP9;
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default:
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UNIMPLEMENTED_MSG("Unknown codec {}", current_codec);
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return AV_CODEC_ID_NONE;
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}
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}();
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av_codec = avcodec_find_decoder(codec);
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av_codec_ctx = avcodec_alloc_context3(av_codec);
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av_opt_set(av_codec_ctx->priv_data, "tune", "zerolatency", 0);
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InitializeGpuDecoder();
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if (!av_codec_ctx->hw_device_ctx) {
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LOG_INFO(Service_NVDRV, "Using FFmpeg software decoding");
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}
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if (const int res = avcodec_open2(av_codec_ctx, av_codec, nullptr); res < 0) {
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LOG_ERROR(Service_NVDRV, "avcodec_open2() Failed with result {}", res);
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avcodec_close(av_codec_ctx);
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av_buffer_unref(&av_gpu_decoder);
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return;
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}
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if (!av_codec_ctx->hw_device_ctx) {
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LOG_INFO(Service_NVDRV, "Using FFmpeg software decoding");
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}
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initialized = true;
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}
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@ -155,6 +163,9 @@ void Codec::Decode() {
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if (is_first_frame) {
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Initialize();
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}
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if (!initialized) {
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return;
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}
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bool vp9_hidden_frame = false;
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std::vector<u8> frame_data;
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if (current_codec == NvdecCommon::VideoCodec::H264) {
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@ -191,18 +202,18 @@ void Codec::Decode() {
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LOG_WARNING(Service_NVDRV, "Zero width or height in frame");
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return;
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}
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if (using_gpu_decode) {
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if (av_codec_ctx->hw_device_ctx) {
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final_frame = AVFramePtr{av_frame_alloc(), AVFrameDeleter};
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ASSERT_MSG(final_frame, "av_frame_alloc final_frame failed");
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// Can't use AV_PIX_FMT_YUV420P and share code with software decoding in vic.cpp
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// because Intel drivers crash unless using AV_PIX_FMT_NV12
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final_frame->format = AV_PIX_FMT_NV12;
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final_frame->format = PREFERRED_GPU_FMT;
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const int ret = av_hwframe_transfer_data(final_frame.get(), initial_frame.get(), 0);
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ASSERT_MSG(!ret, "av_hwframe_transfer_data error {}", ret);
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} else {
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final_frame = std::move(initial_frame);
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}
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if (final_frame->format != AV_PIX_FMT_YUV420P && final_frame->format != AV_PIX_FMT_NV12) {
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if (final_frame->format != PREFERRED_CPU_FMT && final_frame->format != PREFERRED_GPU_FMT) {
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UNIMPLEMENTED_MSG("Unexpected video format: {}", final_frame->format);
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return;
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}
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@ -60,7 +60,6 @@ private:
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bool CreateGpuAvDevice();
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bool initialized{};
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bool using_gpu_decode{};
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NvdecCommon::VideoCodec current_codec{NvdecCommon::VideoCodec::None};
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AVCodec* av_codec{nullptr};
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