ffmpeg: remove superfluous custom cuvid hwaccel

It's a duplicate of the properly implemented nvdec libavcodec hwaccel
Reviewed-by: Timo Rothenpieler <timo@rothenpieler.org>
Signed-off-by: James Almer <jamrial@gmail.com>

fftools/Makefile

@@ -10,7 +10,6 @@ ALLAVPROGS   = $(AVBASENAMES:%=%$(PROGSSUF)$(EXESUF))
 ALLAVPROGS_G = $(AVBASENAMES:%=%$(PROGSSUF)_g$(EXESUF))
 
 OBJS-ffmpeg                        += fftools/ffmpeg_opt.o fftools/ffmpeg_filter.o fftools/ffmpeg_hw.o
-OBJS-ffmpeg-$(CONFIG_CUVID)        += fftools/ffmpeg_cuvid.o
 OBJS-ffmpeg-$(CONFIG_LIBMFX)       += fftools/ffmpeg_qsv.o
 ifndef CONFIG_VIDEOTOOLBOX
 OBJS-ffmpeg-$(CONFIG_VDA)          += fftools/ffmpeg_videotoolbox.o

fftools/ffmpeg.h

@@ -61,7 +61,6 @@ enum HWAccelID {
     HWACCEL_GENERIC,
     HWACCEL_VIDEOTOOLBOX,
     HWACCEL_QSV,
-    HWACCEL_CUVID,
 };
 
 typedef struct HWAccel {
@@ -654,7 +653,6 @@ int ffmpeg_parse_options(int argc, char **argv);
 
 int videotoolbox_init(AVCodecContext *s);
 int qsv_init(AVCodecContext *s);
-int cuvid_init(AVCodecContext *s);
 
 HWDevice *hw_device_get_by_name(const char *name);
 int hw_device_init_from_string(const char *arg, HWDevice **dev);

fftools/ffmpeg_cuvid.c

-/*
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "libavutil/hwcontext.h"
-#include "libavutil/pixdesc.h"
-
-#include "ffmpeg.h"
-
-static void cuvid_uninit(AVCodecContext *avctx)
-{
-    InputStream *ist = avctx->opaque;
-    av_buffer_unref(&ist->hw_frames_ctx);
-}
-
-int cuvid_init(AVCodecContext *avctx)
-{
-    InputStream *ist = avctx->opaque;
-    AVHWFramesContext *frames_ctx;
-    int ret;
-
-    av_log(avctx, AV_LOG_VERBOSE, "Initializing cuvid hwaccel\n");
-
-    if (!hw_device_ctx) {
-        ret = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_CUDA,
-                                     ist->hwaccel_device, NULL, 0);
-        if (ret < 0) {
-            av_log(avctx, AV_LOG_ERROR, "Error creating a CUDA device\n");
-            return ret;
-        }
-    }
-
-    av_buffer_unref(&ist->hw_frames_ctx);
-    ist->hw_frames_ctx = av_hwframe_ctx_alloc(hw_device_ctx);
-    if (!ist->hw_frames_ctx) {
-        av_log(avctx, AV_LOG_ERROR, "Error creating a CUDA frames context\n");
-        return AVERROR(ENOMEM);
-    }
-
-    frames_ctx = (AVHWFramesContext*)ist->hw_frames_ctx->data;
-
-    frames_ctx->format = AV_PIX_FMT_CUDA;
-    frames_ctx->sw_format = avctx->sw_pix_fmt;
-    frames_ctx->width = avctx->width;
-    frames_ctx->height = avctx->height;
-
-    av_log(avctx, AV_LOG_DEBUG, "Initializing CUDA frames context: sw_format = %s, width = %d, height = %d\n",
-           av_get_pix_fmt_name(frames_ctx->sw_format), frames_ctx->width, frames_ctx->height);
-
-    ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
-    if (ret < 0) {
-        av_log(avctx, AV_LOG_ERROR, "Error initializing a CUDA frame pool\n");
-        return ret;
-    }
-
-    ist->hwaccel_uninit = cuvid_uninit;
-
-    return 0;
-}

fftools/ffmpeg_opt.c

@@ -72,9 +72,6 @@ const HWAccel hwaccels[] = {
 #endif
 #if CONFIG_LIBMFX
     { "qsv",   qsv_init,   HWACCEL_QSV,   AV_PIX_FMT_QSV },
-#endif
-#if CONFIG_CUVID
-    { "cuvid", cuvid_init, HWACCEL_CUVID, AV_PIX_FMT_CUDA },
 #endif
     { 0 },
 };
@@ -822,7 +819,7 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
             MATCH_PER_STREAM_OPT(hwaccels, str, hwaccel, ic, st);
             if (hwaccel) {
                 // The NVDEC hwaccels use a CUDA device, so remap the name here.
-                if (!strcmp(hwaccel, "nvdec"))
+                if (!strcmp(hwaccel, "nvdec") || !strcmp(hwaccel, "cuvid"))
                     hwaccel = "cuda";
 
                 if (!strcmp(hwaccel, "none"))