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/*
* 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 <mfx/mfxvideo.h>
#include <stdlib.h>
#include "libavutil/dict.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_qsv.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavcodec/qsv.h"
#include "ffmpeg.h"
char *qsv_device = NULL;
static int qsv_get_buffer(AVCodecContext *s, AVFrame *frame, int flags)
{
InputStream *ist = s->opaque;
return av_hwframe_get_buffer(ist->hw_frames_ctx, frame, 0);
}
static void qsv_uninit(AVCodecContext *s)
{
InputStream *ist = s->opaque;
av_buffer_unref(&ist->hw_frames_ctx);
}
static int qsv_device_init(InputStream *ist)
{
int err;
AVDictionary *dict = NULL;
if (qsv_device) {
err = av_dict_set(&dict, "child_device", qsv_device, 0);
if (err < 0)
return err;
}
err = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV,
ist->hwaccel_device, dict, 0);
if (err < 0) {
av_log(NULL, AV_LOG_ERROR, "Error creating a QSV device\n");
goto err_out;
}
err_out:
if (dict)
av_dict_free(&dict);
return err;
}
int qsv_init(AVCodecContext *s)
{
InputStream *ist = s->opaque;
AVHWFramesContext *frames_ctx;
AVQSVFramesContext *frames_hwctx;
int ret;
if (!hw_device_ctx) {
ret = qsv_device_init(ist);
if (ret < 0)
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)
return AVERROR(ENOMEM);
frames_ctx = (AVHWFramesContext*)ist->hw_frames_ctx->data;
frames_hwctx = frames_ctx->hwctx;
frames_ctx->width = FFALIGN(s->coded_width, 32);
frames_ctx->height = FFALIGN(s->coded_height, 32);
frames_ctx->format = AV_PIX_FMT_QSV;
frames_ctx->sw_format = s->sw_pix_fmt;
frames_ctx->initial_pool_size = 64;
frames_hwctx->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
ret = av_hwframe_ctx_init(ist->hw_frames_ctx);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error initializing a QSV frame pool\n");
return ret;
}
ist->hwaccel_get_buffer = qsv_get_buffer;
ist->hwaccel_uninit = qsv_uninit;
return 0;
}
int qsv_transcode_init(OutputStream *ost)
{
InputStream *ist;
const enum AVPixelFormat *pix_fmt;
int err, i;
AVBufferRef *encode_frames_ref = NULL;
AVHWFramesContext *encode_frames;
AVQSVFramesContext *qsv_frames;
/* check if the encoder supports QSV */
if (!ost->enc->pix_fmts)
return 0;
for (pix_fmt = ost->enc->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++)
if (*pix_fmt == AV_PIX_FMT_QSV)
break;
if (*pix_fmt == AV_PIX_FMT_NONE)
return 0;
if (strcmp(ost->avfilter, "null") || ost->source_index < 0)
return 0;
/* check if the decoder supports QSV and the output only goes to this stream */
ist = input_streams[ost->source_index];
if (ist->hwaccel_id != HWACCEL_QSV || !ist->dec || !ist->dec->pix_fmts)
return 0;
for (pix_fmt = ist->dec->pix_fmts; *pix_fmt != AV_PIX_FMT_NONE; pix_fmt++)
if (*pix_fmt == AV_PIX_FMT_QSV)
break;
if (*pix_fmt == AV_PIX_FMT_NONE)
return 0;
for (i = 0; i < nb_output_streams; i++)
if (output_streams[i] != ost &&
output_streams[i]->source_index == ost->source_index)
return 0;
av_log(NULL, AV_LOG_VERBOSE, "Setting up QSV transcoding\n");
if (!hw_device_ctx) {
err = qsv_device_init(ist);
if (err < 0)
goto fail;
}
// This creates a dummy hw_frames_ctx for the encoder to be
// suitably initialised. It only contains one real frame, so
// hopefully doesn't waste too much memory.
encode_frames_ref = av_hwframe_ctx_alloc(hw_device_ctx);
if (!encode_frames_ref) {
err = AVERROR(ENOMEM);
goto fail;
}
encode_frames = (AVHWFramesContext*)encode_frames_ref->data;
qsv_frames = encode_frames->hwctx;
encode_frames->width = FFALIGN(ist->resample_width, 32);
encode_frames->height = FFALIGN(ist->resample_height, 32);
encode_frames->format = AV_PIX_FMT_QSV;
encode_frames->sw_format = AV_PIX_FMT_NV12;
encode_frames->initial_pool_size = 1;
qsv_frames->frame_type = MFX_MEMTYPE_VIDEO_MEMORY_DECODER_TARGET;
err = av_hwframe_ctx_init(encode_frames_ref);
if (err < 0)
goto fail;
ist->dec_ctx->pix_fmt = AV_PIX_FMT_QSV;
ist->resample_pix_fmt = AV_PIX_FMT_QSV;
ost->enc_ctx->pix_fmt = AV_PIX_FMT_QSV;
ost->enc_ctx->hw_frames_ctx = encode_frames_ref;
return 0;
fail:
av_buffer_unref(&encode_frames_ref);
return err;
}
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