mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-12 02:14:56 +02:00
156 lines
4.6 KiB
C
156 lines
4.6 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/hwcontext.h"
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#include "ffmpeg.h"
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typedef struct CUVIDContext {
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AVBufferRef *hw_frames_ctx;
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} CUVIDContext;
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static void cuvid_uninit(AVCodecContext *avctx)
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{
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InputStream *ist = avctx->opaque;
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CUVIDContext *ctx = ist->hwaccel_ctx;
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if (ctx) {
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av_buffer_unref(&ctx->hw_frames_ctx);
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av_freep(&ctx);
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}
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av_buffer_unref(&ist->hw_frames_ctx);
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ist->hwaccel_ctx = 0;
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ist->hwaccel_uninit = 0;
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}
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int cuvid_init(AVCodecContext *avctx)
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{
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InputStream *ist = avctx->opaque;
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CUVIDContext *ctx = ist->hwaccel_ctx;
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av_log(NULL, AV_LOG_TRACE, "Initializing cuvid hwaccel\n");
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if (!ctx) {
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av_log(NULL, AV_LOG_ERROR, "CUVID transcoding is not initialized. "
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"-hwaccel cuvid should only be used for one-to-one CUVID transcoding "
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"with no (software) filters.\n");
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return AVERROR(EINVAL);
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}
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return 0;
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}
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int cuvid_transcode_init(OutputStream *ost)
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{
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InputStream *ist;
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const enum AVPixelFormat *pix_fmt;
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AVHWFramesContext *hwframe_ctx;
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AVBufferRef *device_ref = NULL;
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CUVIDContext *ctx = NULL;
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int ret = 0;
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av_log(NULL, AV_LOG_TRACE, "Initializing cuvid transcoding\n");
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if (ost->source_index < 0)
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return 0;
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ist = input_streams[ost->source_index];
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/* check if the encoder supports CUVID */
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if (!ost->enc->pix_fmts)
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goto cancel;
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for (pix_fmt = ost->enc->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++)
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if (*pix_fmt == AV_PIX_FMT_CUDA)
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break;
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if (*pix_fmt == AV_PIX_FMT_NONE)
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goto cancel;
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/* check if the decoder supports CUVID */
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if (ist->hwaccel_id != HWACCEL_CUVID || !ist->dec || !ist->dec->pix_fmts)
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goto cancel;
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for (pix_fmt = ist->dec->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++)
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if (*pix_fmt == AV_PIX_FMT_CUDA)
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break;
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if (*pix_fmt == AV_PIX_FMT_NONE)
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goto cancel;
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av_log(NULL, AV_LOG_VERBOSE, "Setting up CUVID transcoding\n");
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if (ist->hwaccel_ctx) {
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ctx = ist->hwaccel_ctx;
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} else {
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ctx = av_mallocz(sizeof(*ctx));
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if (!ctx) {
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ret = AVERROR(ENOMEM);
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goto error;
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}
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}
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if (!ctx->hw_frames_ctx) {
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ret = av_hwdevice_ctx_create(&device_ref, AV_HWDEVICE_TYPE_CUDA,
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ist->hwaccel_device, NULL, 0);
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if (ret < 0)
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goto error;
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ctx->hw_frames_ctx = av_hwframe_ctx_alloc(device_ref);
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if (!ctx->hw_frames_ctx) {
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av_log(NULL, AV_LOG_ERROR, "av_hwframe_ctx_alloc failed\n");
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ret = AVERROR(ENOMEM);
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goto error;
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}
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av_buffer_unref(&device_ref);
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ist->hw_frames_ctx = av_buffer_ref(ctx->hw_frames_ctx);
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if (!ist->hw_frames_ctx) {
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av_log(NULL, AV_LOG_ERROR, "av_buffer_ref failed\n");
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ret = AVERROR(ENOMEM);
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goto error;
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}
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ist->hwaccel_ctx = ctx;
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ist->resample_pix_fmt = AV_PIX_FMT_CUDA;
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ist->hwaccel_uninit = cuvid_uninit;
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/* This is a bit hacky, av_hwframe_ctx_init is called by the cuvid decoder
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* once it has probed the neccesary format information. But as filters/nvenc
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* need to know the format/sw_format, set them here so they are happy.
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* This is fine as long as CUVID doesn't add another supported pix_fmt.
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*/
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hwframe_ctx = (AVHWFramesContext*)ctx->hw_frames_ctx->data;
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hwframe_ctx->format = AV_PIX_FMT_CUDA;
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hwframe_ctx->sw_format = AV_PIX_FMT_NV12;
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}
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return 0;
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error:
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av_freep(&ctx);
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av_buffer_unref(&device_ref);
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return ret;
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cancel:
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if (ist->hwaccel_id == HWACCEL_CUVID) {
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av_log(NULL, AV_LOG_ERROR, "CUVID hwaccel requested, but impossible to achive.\n");
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return AVERROR(EINVAL);
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}
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return 0;
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}
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