40af330adf
Avoid possible issues with memmapped hardware buffers in case VDA is not doing a conversion on behalf of the user and make the code more proper as working example. CC: libav-stable@libav.org Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
137 lines
3.9 KiB
C
137 lines
3.9 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 "libavcodec/avcodec.h"
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#include "libavcodec/vda.h"
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#include "libavutil/imgutils.h"
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#include "avconv.h"
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typedef struct VDAContext {
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AVFrame *tmp_frame;
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} VDAContext;
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static int vda_retrieve_data(AVCodecContext *s, AVFrame *frame)
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{
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InputStream *ist = s->opaque;
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VDAContext *vda = ist->hwaccel_ctx;
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CVPixelBufferRef pixbuf = (CVPixelBufferRef)frame->data[3];
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OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
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CVReturn err;
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uint8_t *data[4] = { 0 };
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int linesize[4] = { 0 };
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int planes, ret, i;
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av_frame_unref(vda->tmp_frame);
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switch (pixel_format) {
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case kCVPixelFormatType_420YpCbCr8Planar: vda->tmp_frame->format = AV_PIX_FMT_YUV420P; break;
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case kCVPixelFormatType_422YpCbCr8: vda->tmp_frame->format = AV_PIX_FMT_UYVY422; break;
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default:
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av_log(NULL, AV_LOG_ERROR,
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"Unsupported pixel format: %u\n", pixel_format);
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return AVERROR(ENOSYS);
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}
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vda->tmp_frame->width = frame->width;
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vda->tmp_frame->height = frame->height;
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ret = av_frame_get_buffer(vda->tmp_frame, 32);
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if (ret < 0)
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return ret;
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err = CVPixelBufferLockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
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if (err != kCVReturnSuccess) {
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av_log(NULL, AV_LOG_ERROR, "Error locking the pixel buffer.\n");
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return AVERROR_UNKNOWN;
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}
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if (CVPixelBufferIsPlanar(pixbuf)) {
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planes = CVPixelBufferGetPlaneCount(pixbuf);
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for (i = 0; i < planes; i++) {
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data[i] = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
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linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
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}
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} else {
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data[0] = CVPixelBufferGetBaseAddress(pixbuf);
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linesize[0] = CVPixelBufferGetBytesPerRow(pixbuf);
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}
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av_image_copy(vda->tmp_frame->data, vda->tmp_frame->linesize,
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data, linesize, vda->tmp_frame->format,
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frame->width, frame->height);
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CVPixelBufferUnlockBaseAddress(pixbuf, kCVPixelBufferLock_ReadOnly);
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ret = av_frame_copy_props(vda->tmp_frame, frame);
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if (ret < 0)
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return ret;
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av_frame_unref(frame);
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av_frame_move_ref(frame, vda->tmp_frame);
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return 0;
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}
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static void vda_uninit(AVCodecContext *s)
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{
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InputStream *ist = s->opaque;
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VDAContext *vda = ist->hwaccel_ctx;
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ist->hwaccel_uninit = NULL;
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ist->hwaccel_retrieve_data = NULL;
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av_frame_free(&vda->tmp_frame);
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av_vda_default_free(s);
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av_freep(&ist->hwaccel_ctx);
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}
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int vda_init(AVCodecContext *s)
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{
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InputStream *ist = s->opaque;
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int loglevel = (ist->hwaccel_id == HWACCEL_AUTO) ? AV_LOG_VERBOSE : AV_LOG_ERROR;
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VDAContext *vda;
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int ret;
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vda = av_mallocz(sizeof(*vda));
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if (!vda)
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return AVERROR(ENOMEM);
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ist->hwaccel_ctx = vda;
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ist->hwaccel_uninit = vda_uninit;
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ist->hwaccel_retrieve_data = vda_retrieve_data;
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vda->tmp_frame = av_frame_alloc();
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if (!vda->tmp_frame) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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ret = av_vda_default_init(s);
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if (ret < 0) {
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av_log(NULL, loglevel, "Error creating VDA decoder.\n");
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goto fail;
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}
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return 0;
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fail:
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vda_uninit(s);
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return ret;
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}
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