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videotoolbox: add hwcontext support 

This adds tons of code for no other benefit than making VideoToolbox
support conform with the new hwaccel API (using hw_device_ctx and
hw_frames_ctx).

Since VideoToolbox decoding does not actually require the user to
allocate frames, the new code does mostly nothing.

One benefit is that ffmpeg_videotoolbox.c can be dropped once generic
hwaccel support for ffmpeg.c is merged from Libav.

Does not consider VDA or VideoToolbox encoding.

Fun fact: the frame transfer functions are copied from vaapi, as the
mapping makes copying generic boilerplate. Mapping itself is not
exported by the VT code, because I don't know how to test.
tags/n3.4
wm4 8 years ago
parent
2c6179aa82
commit
532b23f079
11 changed files with 493 additions and 13 deletions
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  1. +8
    -0
      doc/APIchanges
  2. +7
    -0
      libavcodec/vda_vt_internal.h
  3. +2
    -2
      libavcodec/version.h
  4. +170
    -10
      libavcodec/videotoolbox.c
  5. +3
    -0
      libavutil/Makefile
  6. +3
    -0
      libavutil/hwcontext.c
  7. +1
    -0
      libavutil/hwcontext.h
  8. +1
    -0
      libavutil/hwcontext_internal.h
  9. +243
    -0
      libavutil/hwcontext_videotoolbox.c
  10. +54
    -0
      libavutil/hwcontext_videotoolbox.h
  11. +1
    -1
      libavutil/version.h

+ 8
- 0
doc/APIchanges View File

@@ -15,6 +15,14 @@ libavutil: 2015-08-28

API changes, most recent first:

2017-05-15 - xxxxxxxxxx - lavc 57.96.100 - avcodec.h
VideoToolbox hardware-accelerated decoding now supports the new hwaccel API,
which can create the decoder context and allocate hardware frames automatically.
See AVCodecContext.hw_device_ctx and AVCodecContext.hw_frames_ctx.

2017-05-15 - xxxxxxxxxx - lavu 57.63.100 - hwcontext.h
Add AV_HWDEVICE_TYPE_VIDEOTOOLBOX and implementation.

2017-xx-xx - xxxxxxx - lavc 57.95.100 / 57.31.0 - avcodec.h
Add AVCodecContext.apply_cropping to control whether cropping
is handled by libavcodec or the caller.


+ 7
- 0
libavcodec/vda_vt_internal.h View File

@@ -40,6 +40,13 @@ typedef struct VTContext {

// The core video buffer
CVImageBufferRef frame;

// Current dummy frames context (depends on exact CVImageBufferRef params).
struct AVBufferRef *cached_hw_frames_ctx;

// Non-NULL if the new hwaccel API is used. This is only a separate struct
// to ease compatibility with the old API.
struct AVVideotoolboxContext *vt_ctx;
} VTContext;

int ff_videotoolbox_alloc_frame(AVCodecContext *avctx, AVFrame *frame);


+ 2
- 2
libavcodec/version.h View File

@@ -28,8 +28,8 @@
#include "libavutil/version.h"

#define LIBAVCODEC_VERSION_MAJOR 57
#define LIBAVCODEC_VERSION_MINOR 95
#define LIBAVCODEC_VERSION_MICRO 101
#define LIBAVCODEC_VERSION_MINOR 96
#define LIBAVCODEC_VERSION_MICRO 100

#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \


+ 170
- 10
libavcodec/videotoolbox.c View File

@@ -23,11 +23,13 @@
#include "config.h"
#if CONFIG_VIDEOTOOLBOX
# include "videotoolbox.h"
# include "libavutil/hwcontext_videotoolbox.h"
#else
# include "vda.h"
#endif
#include "vda_vt_internal.h"
#include "libavutil/avutil.h"
#include "libavutil/hwcontext.h"
#include "bytestream.h"
#include "h264dec.h"
#include "mpegvideo.h"
@@ -188,6 +190,73 @@ int ff_videotoolbox_uninit(AVCodecContext *avctx)
}

#if CONFIG_VIDEOTOOLBOX
// Return the AVVideotoolboxContext that matters currently. Where it comes from
// depends on the API used.
static AVVideotoolboxContext *videotoolbox_get_context(AVCodecContext *avctx)
{
// Somewhat tricky because the user can call av_videotoolbox_default_free()
// at any time, even when the codec is closed.
if (avctx->internal && avctx->internal->hwaccel_priv_data) {
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
if (vtctx->vt_ctx)
return vtctx->vt_ctx;
}
return avctx->hwaccel_context;
}

static int videotoolbox_buffer_create(AVCodecContext *avctx, AVFrame *frame)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
CVPixelBufferRef pixbuf = (CVPixelBufferRef)vtctx->frame;
OSType pixel_format = CVPixelBufferGetPixelFormatType(pixbuf);
enum AVPixelFormat sw_format = av_map_videotoolbox_format_to_pixfmt(pixel_format);
int width = CVPixelBufferGetWidth(pixbuf);
int height = CVPixelBufferGetHeight(pixbuf);
AVHWFramesContext *cached_frames;
int ret;

ret = ff_videotoolbox_buffer_create(vtctx, frame);
if (ret < 0)
return ret;

// Old API code path.
if (!vtctx->cached_hw_frames_ctx)
return 0;

cached_frames = (AVHWFramesContext*)vtctx->cached_hw_frames_ctx->data;

if (cached_frames->sw_format != sw_format ||
cached_frames->width != width ||
cached_frames->height != height) {
AVBufferRef *hw_frames_ctx = av_hwframe_ctx_alloc(cached_frames->device_ref);
AVHWFramesContext *hw_frames;
if (!hw_frames_ctx)
return AVERROR(ENOMEM);

hw_frames = (AVHWFramesContext*)hw_frames_ctx->data;
hw_frames->format = cached_frames->format;
hw_frames->sw_format = sw_format;
hw_frames->width = width;
hw_frames->height = height;

ret = av_hwframe_ctx_init(hw_frames_ctx);
if (ret < 0) {
av_buffer_unref(&hw_frames_ctx);
return ret;
}

av_buffer_unref(&vtctx->cached_hw_frames_ctx);
vtctx->cached_hw_frames_ctx = hw_frames_ctx;
}

av_assert0(!frame->hw_frames_ctx);
frame->hw_frames_ctx = av_buffer_ref(vtctx->cached_hw_frames_ctx);
if (!frame->hw_frames_ctx)
return AVERROR(ENOMEM);

return 0;
}

static void videotoolbox_write_mp4_descr_length(PutByteContext *pb, int length)
{
int i;
@@ -323,7 +392,7 @@ static OSStatus videotoolbox_session_decode_frame(AVCodecContext *avctx)
{
OSStatus status;
CMSampleBufferRef sample_buf;
AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
VTContext *vtctx = avctx->internal->hwaccel_priv_data;

sample_buf = videotoolbox_sample_buffer_create(videotoolbox->cm_fmt_desc,
@@ -349,7 +418,7 @@ static OSStatus videotoolbox_session_decode_frame(AVCodecContext *avctx)
static int videotoolbox_common_end_frame(AVCodecContext *avctx, AVFrame *frame)
{
int status;
AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
VTContext *vtctx = avctx->internal->hwaccel_priv_data;

if (!videotoolbox->session || !vtctx->bitstream)
@@ -365,7 +434,7 @@ static int videotoolbox_common_end_frame(AVCodecContext *avctx, AVFrame *frame)
if (!vtctx->frame)
return AVERROR_UNKNOWN;

return ff_videotoolbox_buffer_create(vtctx, frame);
return videotoolbox_buffer_create(avctx, frame);
}

static int videotoolbox_h264_end_frame(AVCodecContext *avctx)
@@ -513,7 +582,7 @@ static CMVideoFormatDescriptionRef videotoolbox_format_desc_create(CMVideoCodecT

static int videotoolbox_default_init(AVCodecContext *avctx)
{
AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);
OSStatus status;
VTDecompressionOutputCallbackRecord decoder_cb;
CFDictionaryRef decoder_spec;
@@ -594,7 +663,7 @@ static int videotoolbox_default_init(AVCodecContext *avctx)

static void videotoolbox_default_free(AVCodecContext *avctx)
{
AVVideotoolboxContext *videotoolbox = avctx->hwaccel_context;
AVVideotoolboxContext *videotoolbox = videotoolbox_get_context(avctx);

if (videotoolbox) {
if (videotoolbox->cm_fmt_desc)
@@ -607,6 +676,92 @@ static void videotoolbox_default_free(AVCodecContext *avctx)
}
}

static int videotoolbox_uninit(AVCodecContext *avctx)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
if (!vtctx)
return 0;

ff_videotoolbox_uninit(avctx);

if (vtctx->vt_ctx)
videotoolbox_default_free(avctx);

av_buffer_unref(&vtctx->cached_hw_frames_ctx);
av_freep(&vtctx->vt_ctx);

return 0;
}

static int videotoolbox_common_init(AVCodecContext *avctx)
{
VTContext *vtctx = avctx->internal->hwaccel_priv_data;
AVHWFramesContext *hw_frames;
int err;

// Old API - do nothing.
if (avctx->hwaccel_context)
return 0;

if (!avctx->hw_frames_ctx && !avctx->hw_device_ctx) {
av_log(avctx, AV_LOG_ERROR,
"Either hw_frames_ctx or hw_device_ctx must be set.\n");
return AVERROR(EINVAL);
}

vtctx->vt_ctx = av_videotoolbox_alloc_context();
if (!vtctx->vt_ctx) {
err = AVERROR(ENOMEM);
goto fail;
}

if (avctx->hw_frames_ctx) {
hw_frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
} else {
avctx->hw_frames_ctx = av_hwframe_ctx_alloc(avctx->hw_device_ctx);
if (!avctx->hw_frames_ctx) {
err = AVERROR(ENOMEM);
goto fail;
}

hw_frames = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
hw_frames->format = AV_PIX_FMT_VIDEOTOOLBOX;
hw_frames->sw_format = AV_PIX_FMT_NV12; // same as av_videotoolbox_alloc_context()
hw_frames->width = avctx->width;
hw_frames->height = avctx->height;

err = av_hwframe_ctx_init(avctx->hw_frames_ctx);
if (err < 0) {
av_buffer_unref(&avctx->hw_frames_ctx);
goto fail;
}
}

vtctx->cached_hw_frames_ctx = av_buffer_ref(avctx->hw_frames_ctx);
if (!vtctx->cached_hw_frames_ctx) {
err = AVERROR(ENOMEM);
goto fail;
}

vtctx->vt_ctx->cv_pix_fmt_type =
av_map_videotoolbox_format_from_pixfmt(hw_frames->sw_format);
if (!vtctx->vt_ctx->cv_pix_fmt_type) {
av_log(avctx, AV_LOG_ERROR, "Unknown sw_format.\n");
err = AVERROR(EINVAL);
goto fail;
}

err = videotoolbox_default_init(avctx);
if (err < 0)
goto fail;

return 0;

fail:
videotoolbox_uninit(avctx);
return err;
}

AVHWAccel ff_h263_videotoolbox_hwaccel = {
.name = "h263_videotoolbox",
.type = AVMEDIA_TYPE_VIDEO,
@@ -616,7 +771,8 @@ AVHWAccel ff_h263_videotoolbox_hwaccel = {
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.uninit = ff_videotoolbox_uninit,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};

@@ -629,7 +785,8 @@ AVHWAccel ff_h264_videotoolbox_hwaccel = {
.start_frame = ff_videotoolbox_h264_start_frame,
.decode_slice = ff_videotoolbox_h264_decode_slice,
.end_frame = videotoolbox_h264_end_frame,
.uninit = ff_videotoolbox_uninit,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};

@@ -642,7 +799,8 @@ AVHWAccel ff_mpeg1_videotoolbox_hwaccel = {
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.uninit = ff_videotoolbox_uninit,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};

@@ -655,7 +813,8 @@ AVHWAccel ff_mpeg2_videotoolbox_hwaccel = {
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.uninit = ff_videotoolbox_uninit,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};

@@ -668,7 +827,8 @@ AVHWAccel ff_mpeg4_videotoolbox_hwaccel = {
.start_frame = videotoolbox_mpeg_start_frame,
.decode_slice = videotoolbox_mpeg_decode_slice,
.end_frame = videotoolbox_mpeg_end_frame,
.uninit = ff_videotoolbox_uninit,
.init = videotoolbox_common_init,
.uninit = videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};



+ 3
- 0
libavutil/Makefile View File

@@ -36,6 +36,7 @@ HEADERS = adler32.h \
hwcontext_dxva2.h \
hwcontext_qsv.h \
hwcontext_vaapi.h \
hwcontext_videotoolbox.h \
hwcontext_vdpau.h \
imgutils.h \
intfloat.h \
@@ -160,6 +161,7 @@ OBJS-$(CONFIG_QSV) += hwcontext_qsv.o
OBJS-$(CONFIG_LZO) += lzo.o
OBJS-$(CONFIG_OPENCL) += opencl.o opencl_internal.o
OBJS-$(CONFIG_VAAPI) += hwcontext_vaapi.o
OBJS-$(CONFIG_VIDEOTOOLBOX) += hwcontext_videotoolbox.o
OBJS-$(CONFIG_VDPAU) += hwcontext_vdpau.o

OBJS += $(COMPAT_OBJS:%=../compat/%)
@@ -172,6 +174,7 @@ SKIPHEADERS-$(CONFIG_CUDA) += hwcontext_cuda_internal.h
SKIPHEADERS-$(CONFIG_DXVA2) += hwcontext_dxva2.h
SKIPHEADERS-$(CONFIG_QSV) += hwcontext_qsv.h
SKIPHEADERS-$(CONFIG_VAAPI) += hwcontext_vaapi.h
SKIPHEADERS-$(CONFIG_VIDEOTOOLBOX) += hwcontext_videotoolbox.h
SKIPHEADERS-$(CONFIG_VDPAU) += hwcontext_vdpau.h
SKIPHEADERS-$(HAVE_ATOMICS_GCC) += atomic_gcc.h
SKIPHEADERS-$(HAVE_ATOMICS_SUNCC) += atomic_suncc.h


+ 3
- 0
libavutil/hwcontext.c View File

@@ -43,6 +43,9 @@ static const HWContextType *hw_table[] = {
#endif
#if CONFIG_VDPAU
&ff_hwcontext_type_vdpau,
#endif
#if CONFIG_VIDEOTOOLBOX
&ff_hwcontext_type_videotoolbox,
#endif
NULL,
};


+ 1
- 0
libavutil/hwcontext.h View File

@@ -30,6 +30,7 @@ enum AVHWDeviceType {
AV_HWDEVICE_TYPE_VAAPI,
AV_HWDEVICE_TYPE_DXVA2,
AV_HWDEVICE_TYPE_QSV,
AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
};

typedef struct AVHWDeviceInternal AVHWDeviceInternal;


+ 1
- 0
libavutil/hwcontext_internal.h View File

@@ -144,5 +144,6 @@ extern const HWContextType ff_hwcontext_type_dxva2;
extern const HWContextType ff_hwcontext_type_qsv;
extern const HWContextType ff_hwcontext_type_vaapi;
extern const HWContextType ff_hwcontext_type_vdpau;
extern const HWContextType ff_hwcontext_type_videotoolbox;

#endif /* AVUTIL_HWCONTEXT_INTERNAL_H */

+ 243
- 0
libavutil/hwcontext_videotoolbox.c View File

@@ -0,0 +1,243 @@
/*
* 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 },
};

+ 54
- 0
libavutil/hwcontext_videotoolbox.h View File

@@ -0,0 +1,54 @@
/*
* 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
*/

#ifndef AVUTIL_HWCONTEXT_VT_H
#define AVUTIL_HWCONTEXT_VT_H

#include <stdint.h>

#include <VideoToolbox/VideoToolbox.h>

#include "pixfmt.h"

/**
* @file
* An API-specific header for AV_HWDEVICE_TYPE_VIDEOTOOLBOX.
*
* This API currently does not support frame allocation, as the raw VideoToolbox
* API does allocation, and FFmpeg itself never has the need to allocate frames.
*
* If the API user sets a custom pool, AVHWFramesContext.pool must return
* AVBufferRefs whose data pointer is a CVImageBufferRef or CVPixelBufferRef.
*
* Currently AVHWDeviceContext.hwctx and AVHWFramesContext.hwctx are always
* NULL.
*/

/**
* Convert a VideoToolbox (actually CoreVideo) format to AVPixelFormat.
* Returns AV_PIX_FMT_NONE if no known equivalent was found.
*/
enum AVPixelFormat av_map_videotoolbox_format_to_pixfmt(uint32_t cv_fmt);

/**
* Convert an AVPixelFormat to a VideoToolbox (actually CoreVideo) format.
* Returns 0 if no known equivalent was found.
*/
uint32_t av_map_videotoolbox_format_from_pixfmt(enum AVPixelFormat pix_fmt);

#endif /* AVUTIL_HWCONTEXT_VT_H */

+ 1
- 1
libavutil/version.h View File

@@ -80,7 +80,7 @@


#define LIBAVUTIL_VERSION_MAJOR 55
#define LIBAVUTIL_VERSION_MINOR 62
#define LIBAVUTIL_VERSION_MINOR 63
#define LIBAVUTIL_VERSION_MICRO 100

#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \


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