forked from dji-sdk/FFmpeg
/
ffmpeg_vda.c
136 lines (111 loc) · 3.92 KB
/
ffmpeg_vda.c
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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 "libavcodec/avcodec.h"
#include "libavcodec/vda.h"
#include "libavutil/imgutils.h"
#include "ffmpeg.h"
typedef struct VDAContext {
AVFrame *tmp_frame;
} VDAContext;
static int vda_retrieve_data(AVCodecContext *s, AVFrame *frame)
{
InputStream *ist = s->opaque;
VDAContext *vda = ist->hwaccel_ctx;
CVPixelBufferRef pixbuf = (CVPixelBufferRef)frame->data[3];
OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
CVReturn err;
uint8_t *data[4] = { 0 };
int linesize[4] = { 0 };
int planes, ret, i;
av_frame_unref(vda->tmp_frame);
switch (pixel_format) {
case kCVPixelFormatType_420YpCbCr8Planar: vda->tmp_frame->format = AV_PIX_FMT_YUV420P; break;
case kCVPixelFormatType_422YpCbCr8: vda->tmp_frame->format = AV_PIX_FMT_UYVY422; break;
default:
av_log(NULL, AV_LOG_ERROR,
"Unsupported pixel format: %u\n", pixel_format);
return AVERROR(ENOSYS);
}
vda->tmp_frame->width = frame->width;
vda->tmp_frame->height = frame->height;
ret = av_frame_get_buffer(vda->tmp_frame, 32);
if (ret < 0)
return ret;
err = CVPixelBufferLockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
if (err != kCVReturnSuccess) {
av_log(NULL, AV_LOG_ERROR, "Error locking the pixel buffer.\n");
return AVERROR_UNKNOWN;
}
if (CVPixelBufferIsPlanar(pixbuf)) {
planes = CVPixelBufferGetPlaneCount(pixbuf);
for (i = 0; i < planes; i++) {
data[i] = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
}
} else {
data[0] = CVPixelBufferGetBaseAddress(pixbuf);
linesize[0] = CVPixelBufferGetBytesPerRow(pixbuf);
}
av_image_copy(vda->tmp_frame->data, vda->tmp_frame->linesize,
data, linesize, vda->tmp_frame->format,
frame->width, frame->height);
ret = av_frame_copy_props(vda->tmp_frame, frame);
CVPixelBufferUnlockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
if (ret < 0)
return ret;
av_frame_unref(frame);
av_frame_move_ref(frame, vda->tmp_frame);
return 0;
}
static void vda_uninit(AVCodecContext *s)
{
InputStream *ist = s->opaque;
VDAContext *vda = ist->hwaccel_ctx;
ist->hwaccel_uninit = NULL;
ist->hwaccel_retrieve_data = NULL;
av_frame_free(&vda->tmp_frame);
av_vda_default_free(s);
av_freep(&ist->hwaccel_ctx);
}
int vda_init(AVCodecContext *s)
{
InputStream *ist = s->opaque;
int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
VDAContext *vda;
int ret;
vda = av_mallocz(sizeof(*vda));
if (!vda)
return AVERROR(ENOMEM);
ist->hwaccel_ctx = vda;
ist->hwaccel_uninit = vda_uninit;
ist->hwaccel_retrieve_data = vda_retrieve_data;
vda->tmp_frame = av_frame_alloc();
if (!vda->tmp_frame) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = av_vda_default_init(s);
if (ret < 0) {
av_log(NULL, loglevel, "Error creating VDA decoder.\n");
goto fail;
}
return 0;
fail:
vda_uninit(s);
return ret;
}