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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 "config.h"
#include <stdint.h>
#include <string.h>
#include <VideoToolbox/VideoToolbox.h>
#include "buffer.h"
#include "common.h"
#include "hwcontext.h"
#include "hwcontext_internal.h"
#include "hwcontext_videotoolbox.h"
#include "mem.h"
#include "pixfmt.h"
#include "pixdesc.h"
static const struct {
uint32_t cv_fmt;
enum AVPixelFormat pix_fmt;
} cv_pix_fmts[] = {
{ kCVPixelFormatType_420YpCbCr8Planar, AV_PIX_FMT_YUV420P },
{ kCVPixelFormatType_422YpCbCr8, AV_PIX_FMT_UYVY422 },
{ kCVPixelFormatType_32BGRA, AV_PIX_FMT_BGRA },
#ifdef kCFCoreFoundationVersionNumber10_7
{ kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange, AV_PIX_FMT_NV12 },
#endif
};
enum AVPixelFormat av_map_videotoolbox_format_to_pixfmt(uint32_t cv_fmt)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(cv_pix_fmts); i++) {
if (cv_pix_fmts[i].cv_fmt == cv_fmt)
return cv_pix_fmts[i].pix_fmt;
}
return AV_PIX_FMT_NONE;
}
uint32_t av_map_videotoolbox_format_from_pixfmt(enum AVPixelFormat pix_fmt)
{
int i;
for (i = 0; i < FF_ARRAY_ELEMS(cv_pix_fmts); i++) {
if (cv_pix_fmts[i].pix_fmt == pix_fmt)
return cv_pix_fmts[i].cv_fmt;
}
return 0;
}
static int vt_get_buffer(AVHWFramesContext *ctx, AVFrame *frame)
{
frame->buf[0] = av_buffer_pool_get(ctx->pool);
if (!frame->buf[0])
return AVERROR(ENOMEM);
frame->data[3] = frame->buf[0]->data;
frame->format = AV_PIX_FMT_VIDEOTOOLBOX;
frame->width = ctx->width;
frame->height = ctx->height;
return 0;
}
static int vt_transfer_get_formats(AVHWFramesContext *ctx,
enum AVHWFrameTransferDirection dir,
enum AVPixelFormat **formats)
{
enum AVPixelFormat *fmts = av_malloc_array(2, sizeof(*fmts));
if (!fmts)
return AVERROR(ENOMEM);
fmts[0] = ctx->sw_format;
fmts[1] = AV_PIX_FMT_NONE;
*formats = fmts;
return 0;
}
static void vt_unmap(AVHWFramesContext *ctx, HWMapDescriptor *hwmap)
{
CVPixelBufferRef pixbuf = (CVPixelBufferRef)hwmap->source->data[3];
CVPixelBufferUnlockBaseAddress(pixbuf, (uintptr_t)hwmap->priv);
}
static int vt_map_frame(AVHWFramesContext *ctx, AVFrame *dst, const AVFrame *src,
int flags)
{
CVPixelBufferRef pixbuf = (CVPixelBufferRef)src->data[3];
OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
CVReturn err;
uint32_t map_flags = 0;
int ret;
int i;
enum AVPixelFormat format;
format = av_map_videotoolbox_format_to_pixfmt(pixel_format);
if (dst->format != format) {
av_log(ctx, AV_LOG_ERROR, "Unsupported or mismatching pixel format: %s\n",
av_fourcc2str(pixel_format));
return AVERROR_UNKNOWN;
}
if (CVPixelBufferGetWidth(pixbuf) != ctx->width ||
CVPixelBufferGetHeight(pixbuf) != ctx->height) {
av_log(ctx, AV_LOG_ERROR, "Inconsistent frame dimensions.\n");
return AVERROR_UNKNOWN;
}
if (flags == AV_HWFRAME_MAP_READ)
map_flags = kCVPixelBufferLock_ReadOnly;
err = CVPixelBufferLockBaseAddress(pixbuf, map_flags);
if (err != kCVReturnSuccess) {
av_log(ctx, AV_LOG_ERROR, "Error locking the pixel buffer.\n");
return AVERROR_UNKNOWN;
}
if (CVPixelBufferIsPlanar(pixbuf)) {
int planes = CVPixelBufferGetPlaneCount(pixbuf);
for (i = 0; i < planes; i++) {
dst->data[i] = CVPixelBufferGetBaseAddressOfPlane(pixbuf, i);
dst->linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(pixbuf, i);
}
} else {
dst->data[0] = CVPixelBufferGetBaseAddress(pixbuf);
dst->linesize[0] = CVPixelBufferGetBytesPerRow(pixbuf);
}
ret = ff_hwframe_map_create(src->hw_frames_ctx, dst, src, vt_unmap,
(void *)(uintptr_t)map_flags);
if (ret < 0)
goto unlock;
return 0;
unlock:
CVPixelBufferUnlockBaseAddress(pixbuf, map_flags);
return ret;
}
static int vt_transfer_data_from(AVHWFramesContext *hwfc,
AVFrame *dst, const AVFrame *src)
{
AVFrame *map;
int err;
if (dst->width > hwfc->width || dst->height > hwfc->height)
return AVERROR(EINVAL);
map = av_frame_alloc();
if (!map)
return AVERROR(ENOMEM);
map->format = dst->format;
err = vt_map_frame(hwfc, map, src, AV_HWFRAME_MAP_READ);
if (err)
goto fail;
map->width = dst->width;
map->height = dst->height;
err = av_frame_copy(dst, map);
if (err)
goto fail;
err = 0;
fail:
av_frame_free(&map);
return err;
}
static int vt_transfer_data_to(AVHWFramesContext *hwfc,
AVFrame *dst, const AVFrame *src)
{
AVFrame *map;
int err;
if (src->width > hwfc->width || src->height > hwfc->height)
return AVERROR(EINVAL);
map = av_frame_alloc();
if (!map)
return AVERROR(ENOMEM);
map->format = src->format;
err = vt_map_frame(hwfc, map, dst, AV_HWFRAME_MAP_WRITE | AV_HWFRAME_MAP_OVERWRITE);
if (err)
goto fail;
map->width = src->width;
map->height = src->height;
err = av_frame_copy(map, src);
if (err)
goto fail;
err = 0;
fail:
av_frame_free(&map);
return err;
}
static int vt_device_create(AVHWDeviceContext *ctx, const char *device,
AVDictionary *opts, int flags)
{
if (device && device[0]) {
av_log(ctx, AV_LOG_ERROR, "Device selection unsupported.\n");
return AVERROR_UNKNOWN;
}
return 0;
}
const HWContextType ff_hwcontext_type_videotoolbox = {
.type = AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
.name = "videotoolbox",
.device_create = vt_device_create,
.frames_get_buffer = vt_get_buffer,
.transfer_get_formats = vt_transfer_get_formats,
.transfer_data_to = vt_transfer_data_to,
.transfer_data_from = vt_transfer_data_from,
.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_VIDEOTOOLBOX, AV_PIX_FMT_NONE },
};
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