avcodec: Implement mpeg1 nvdec hwaccel

Once I remembered that there's a separate decoder type for mpeg1,
even though params struct is shared with mpeg2, everything worked.

Changelog

@@ -13,7 +13,7 @@ version <next>:
 - PCE support for extended channel layouts in the AAC encoder
 - native aptX encoder and decoder
 - Raw aptX muxer and demuxer
-- NVIDIA NVDEC-accelerated H.264, HEVC, MPEG-2, VC1 and VP9 hwaccel decoding
+- NVIDIA NVDEC-accelerated H.264, HEVC, MPEG-1/2, VC1 and VP9 hwaccel decoding
 - Intel QSV-accelerated overlay filter
 - mcompand audio filter
 - acontrast audio filter

configure

@@ -2704,6 +2704,8 @@ mjpeg_cuvid_hwaccel_select="mjpeg_cuvid_decoder"
 mpeg_xvmc_hwaccel_deps="xvmc"
 mpeg_xvmc_hwaccel_select="mpeg2video_decoder"
 mpeg1_cuvid_hwaccel_select="mpeg1_cuvid_decoder"
+mpeg1_nvdec_hwaccel_deps="nvdec"
+mpeg1_nvdec_hwaccel_select="mpeg1video_decoder"
 mpeg1_vdpau_hwaccel_deps="vdpau"
 mpeg1_vdpau_hwaccel_select="mpeg1video_decoder"
 mpeg1_videotoolbox_hwaccel_deps="videotoolbox"

libavcodec/Makefile

@@ -849,6 +849,7 @@ OBJS-$(CONFIG_HEVC_NVDEC_HWACCEL)         += nvdec_hevc.o
 OBJS-$(CONFIG_HEVC_QSV_HWACCEL)           += qsvdec_h2645.o
 OBJS-$(CONFIG_HEVC_VAAPI_HWACCEL)         += vaapi_hevc.o
 OBJS-$(CONFIG_HEVC_VDPAU_HWACCEL)         += vdpau_hevc.o
+OBJS-$(CONFIG_MPEG1_NVDEC_HWACCEL)        += nvdec_mpeg12.o
 OBJS-$(CONFIG_MPEG1_VDPAU_HWACCEL)        += vdpau_mpeg12.o
 OBJS-$(CONFIG_MPEG1_VIDEOTOOLBOX_HWACCEL) += videotoolbox.o
 OBJS-$(CONFIG_MPEG1_XVMC_HWACCEL)         += mpegvideo_xvmc.o

libavcodec/allcodecs.c

@@ -87,6 +87,7 @@ static void register_all(void)
     REGISTER_HWACCEL(HEVC_VIDEOTOOLBOX, hevc_videotoolbox);
     REGISTER_HWACCEL(MJPEG_CUVID,       mjpeg_cuvid);
     REGISTER_HWACCEL(MPEG1_CUVID,       mpeg1_cuvid);
+    REGISTER_HWACCEL(MPEG1_NVDEC,       mpeg1_nvdec);
     REGISTER_HWACCEL(MPEG1_XVMC,        mpeg1_xvmc);
     REGISTER_HWACCEL(MPEG1_VDPAU,       mpeg1_vdpau);
     REGISTER_HWACCEL(MPEG1_VIDEOTOOLBOX, mpeg1_videotoolbox);

libavcodec/mpeg12dec.c

@@ -1130,6 +1130,9 @@ static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
 }
 
 static const enum AVPixelFormat mpeg1_hwaccel_pixfmt_list_420[] = {
+#if CONFIG_MPEG1_NVDEC_HWACCEL
+    AV_PIX_FMT_CUDA,
+#endif
 #if CONFIG_MPEG1_XVMC_HWACCEL
     AV_PIX_FMT_XVMC,
 #endif

libavcodec/nvdec.c

@@ -54,6 +54,7 @@ static int map_avcodec_id(enum AVCodecID id)
     switch (id) {
     case AV_CODEC_ID_H264:       return cudaVideoCodec_H264;
     case AV_CODEC_ID_HEVC:       return cudaVideoCodec_HEVC;
+    case AV_CODEC_ID_MPEG1VIDEO: return cudaVideoCodec_MPEG1;
     case AV_CODEC_ID_MPEG2VIDEO: return cudaVideoCodec_MPEG2;
     case AV_CODEC_ID_VC1:        return cudaVideoCodec_VC1;
     case AV_CODEC_ID_VP9:        return cudaVideoCodec_VP9;

libavcodec/nvdec_mpeg12.c

 /*
- * MPEG-2 HW decode acceleration through NVDEC
+ * MPEG-1/2 HW decode acceleration through NVDEC
  *
  * Copyright (c) 2017 Philip Langdale
  *
@@ -105,3 +105,19 @@ AVHWAccel ff_mpeg2_nvdec_hwaccel = {
     .priv_data_size       = sizeof(NVDECContext),
 };
 #endif
+
+#if CONFIG_MPEG1_NVDEC_HWACCEL
+AVHWAccel ff_mpeg1_nvdec_hwaccel = {
+    .name                 = "mpeg1_nvdec",
+    .type                 = AVMEDIA_TYPE_VIDEO,
+    .id                   = AV_CODEC_ID_MPEG1VIDEO,
+    .pix_fmt              = AV_PIX_FMT_CUDA,
+    .start_frame          = nvdec_mpeg12_start_frame,
+    .end_frame            = ff_nvdec_simple_end_frame,
+    .decode_slice         = ff_nvdec_simple_decode_slice,
+    .frame_params         = nvdec_mpeg12_frame_params,
+    .init                 = ff_nvdec_decode_init,
+    .uninit               = ff_nvdec_decode_uninit,
+    .priv_data_size       = sizeof(NVDECContext),
+};
+#endif

libavcodec/version.h

@@ -29,7 +29,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR  58
 #define LIBAVCODEC_VERSION_MINOR   3
-#define LIBAVCODEC_VERSION_MICRO 103
+#define LIBAVCODEC_VERSION_MICRO 104
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \