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ffmpeg/libavcodec/vda_h264.c

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/*
* VDA H264 HW acceleration.
*
* copyright (c) 2011 Sebastien Zwickert
*
* 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 <CoreFoundation/CFDictionary.h>
#include <CoreFoundation/CFNumber.h>
#include <CoreFoundation/CFData.h>
#include "vda.h"
#include "libavutil/avutil.h"
#include "h264.h"
struct vda_buffer {
CVPixelBufferRef cv_buffer;
};
#include "internal.h"
#include "vda_vt_internal.h"
/* Decoder callback that adds the vda frame to the queue in display order. */
static void vda_decoder_callback(void *vda_hw_ctx,
CFDictionaryRef user_info,
OSStatus status,
uint32_t infoFlags,
CVImageBufferRef image_buffer)
{
struct vda_context *vda_ctx = vda_hw_ctx;
if (infoFlags & kVDADecodeInfo_FrameDropped)
vda_ctx->cv_buffer = NULL;
if (!image_buffer)
return;
if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
return;
vda_ctx->cv_buffer = CVPixelBufferRetain(image_buffer);
}
static int vda_sync_decode(VTContext *ctx, struct vda_context *vda_ctx)
{
OSStatus status;
CFDataRef coded_frame;
uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
coded_frame = CFDataCreate(kCFAllocatorDefault,
ctx->bitstream,
ctx->bitstream_size);
status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
if (kVDADecoderNoErr == status)
status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
CFRelease(coded_frame);
return status;
}
static int vda_old_h264_start_frame(AVCodecContext *avctx,
av_unused const uint8_t *buffer,
av_unused uint32_t size)
{
VTContext *vda = avctx->internal->hwaccel_priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
if (!vda_ctx->decoder)
return -1;
vda->bitstream_size = 0;
return 0;
}
static int vda_old_h264_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
VTContext *vda = avctx->internal->hwaccel_priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
void *tmp;
if (!vda_ctx->decoder)
return -1;
tmp = av_fast_realloc(vda->bitstream,
&vda->allocated_size,
vda->bitstream_size + size + 4);
if (!tmp)
return AVERROR(ENOMEM);
vda->bitstream = tmp;
AV_WB32(vda->bitstream + vda->bitstream_size, size);
memcpy(vda->bitstream + vda->bitstream_size + 4, buffer, size);
vda->bitstream_size += size + 4;
return 0;
}
static void vda_h264_release_buffer(void *opaque, uint8_t *data)
{
struct vda_buffer *context = opaque;
CVPixelBufferRelease(context->cv_buffer);
av_free(context);
}
static int vda_old_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
VTContext *vda = avctx->internal->hwaccel_priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
AVFrame *frame = h->cur_pic_ptr->f;
struct vda_buffer *context;
AVBufferRef *buffer;
int status;
if (!vda_ctx->decoder || !vda->bitstream)
return -1;
status = vda_sync_decode(vda, vda_ctx);
frame->data[3] = (void*)vda_ctx->cv_buffer;
if (status)
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
if (!vda_ctx->use_ref_buffer || status)
return status;
context = av_mallocz(sizeof(*context));
buffer = av_buffer_create(NULL, 0, vda_h264_release_buffer, context, 0);
if (!context || !buffer) {
CVPixelBufferRelease(vda_ctx->cv_buffer);
av_free(context);
return -1;
}
context->cv_buffer = vda_ctx->cv_buffer;
frame->buf[3] = buffer;
return status;
}
int ff_vda_create_decoder(struct vda_context *vda_ctx,
uint8_t *extradata,
int extradata_size)
{
OSStatus status;
CFNumberRef height;
CFNumberRef width;
CFNumberRef format;
CFDataRef avc_data;
CFMutableDictionaryRef config_info;
CFMutableDictionaryRef buffer_attributes;
CFMutableDictionaryRef io_surface_properties;
CFNumberRef cv_pix_fmt;
vda_ctx->priv_bitstream = NULL;
vda_ctx->priv_allocated_size = 0;
/* Each VCL NAL in the bitstream sent to the decoder
* is preceded by a 4 bytes length header.
* Change the avcC atom header if needed, to signal headers of 4 bytes. */
if (extradata_size >= 4 && (extradata[4] & 0x03) != 0x03) {
uint8_t *rw_extradata;
if (!(rw_extradata = av_malloc(extradata_size)))
return AVERROR(ENOMEM);
memcpy(rw_extradata, extradata, extradata_size);
rw_extradata[4] |= 0x03;
avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, extradata_size);
av_freep(&rw_extradata);
} else {
avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
}
config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
4,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
2,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault,
kCFNumberSInt32Type,
&vda_ctx->cv_pix_fmt_type);
CFDictionarySetValue(buffer_attributes,
kCVPixelBufferPixelFormatTypeKey,
cv_pix_fmt);
CFDictionarySetValue(buffer_attributes,
kCVPixelBufferIOSurfacePropertiesKey,
io_surface_properties);
status = VDADecoderCreate(config_info,
buffer_attributes,
(VDADecoderOutputCallback *)vda_decoder_callback,
vda_ctx,
&vda_ctx->decoder);
CFRelease(height);
CFRelease(width);
CFRelease(format);
CFRelease(avc_data);
CFRelease(config_info);
CFRelease(io_surface_properties);
CFRelease(cv_pix_fmt);
CFRelease(buffer_attributes);
return status;
}
int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
{
OSStatus status = kVDADecoderNoErr;
if (vda_ctx->decoder)
status = VDADecoderDestroy(vda_ctx->decoder);
return status;
}
AVHWAccel ff_h264_vda_old_hwaccel = {
.name = "h264_vda",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.pix_fmt = AV_PIX_FMT_VDA_VLD,
.start_frame = vda_old_h264_start_frame,
.decode_slice = vda_old_h264_decode_slice,
.end_frame = vda_old_h264_end_frame,
.uninit = ff_videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
void ff_vda_output_callback(void *opaque,
CFDictionaryRef user_info,
OSStatus status,
uint32_t infoFlags,
CVImageBufferRef image_buffer)
{
AVCodecContext *ctx = opaque;
VTContext *vda = ctx->internal->hwaccel_priv_data;
if (vda->frame) {
CVPixelBufferRelease(vda->frame);
vda->frame = NULL;
}
if (!image_buffer)
return;
vda->frame = CVPixelBufferRetain(image_buffer);
}
static int vda_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
VTContext *vda = avctx->internal->hwaccel_priv_data;
AVVDAContext *vda_ctx = avctx->hwaccel_context;
AVFrame *frame = h->cur_pic_ptr->f;
uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
CFDataRef coded_frame;
OSStatus status;
if (!vda->bitstream_size)
return AVERROR_INVALIDDATA;
coded_frame = CFDataCreate(kCFAllocatorDefault,
vda->bitstream,
vda->bitstream_size);
status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, NULL);
if (status == kVDADecoderNoErr)
status = VDADecoderFlush(vda_ctx->decoder, flush_flags);
CFRelease(coded_frame);
if (!vda->frame)
return AVERROR_UNKNOWN;
if (status != kVDADecoderNoErr) {
av_log(avctx, AV_LOG_ERROR, "Failed to decode frame (%d)\n", status);
return AVERROR_UNKNOWN;
}
return ff_videotoolbox_buffer_create(vda, frame);
}
int ff_vda_default_init(AVCodecContext *avctx)
{
AVVDAContext *vda_ctx = avctx->hwaccel_context;
OSStatus status = kVDADecoderNoErr;
CFNumberRef height;
CFNumberRef width;
CFNumberRef format;
CFDataRef avc_data;
CFMutableDictionaryRef config_info;
CFMutableDictionaryRef buffer_attributes;
CFMutableDictionaryRef io_surface_properties;
CFNumberRef cv_pix_fmt;
int32_t fmt = 'avc1', pix_fmt = vda_ctx->cv_pix_fmt_type;
// kCVPixelFormatType_420YpCbCr8Planar;
avc_data = ff_videotoolbox_avcc_extradata_create(avctx);
config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
4,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->height);
width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &avctx->width);
format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &fmt);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
2,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
0,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault,
kCFNumberSInt32Type,
&pix_fmt);
CFDictionarySetValue(buffer_attributes,
kCVPixelBufferPixelFormatTypeKey,
cv_pix_fmt);
CFDictionarySetValue(buffer_attributes,
kCVPixelBufferIOSurfacePropertiesKey,
io_surface_properties);
status = VDADecoderCreate(config_info,
buffer_attributes,
(VDADecoderOutputCallback *)ff_vda_output_callback,
avctx,
&vda_ctx->decoder);
CFRelease(format);
CFRelease(height);
CFRelease(width);
CFRelease(avc_data);
CFRelease(config_info);
CFRelease(cv_pix_fmt);
CFRelease(io_surface_properties);
CFRelease(buffer_attributes);
if (status != kVDADecoderNoErr) {
av_log(avctx, AV_LOG_ERROR, "Cannot initialize VDA %d\n", status);
}
switch (status) {
case kVDADecoderHardwareNotSupportedErr:
case kVDADecoderFormatNotSupportedErr:
return AVERROR(ENOSYS);
case kVDADecoderConfigurationError:
return AVERROR(EINVAL);
case kVDADecoderDecoderFailedErr:
return AVERROR_INVALIDDATA;
case kVDADecoderNoErr:
return 0;
default:
return AVERROR_UNKNOWN;
}
}
AVHWAccel ff_h264_vda_hwaccel = {
.name = "h264_vda",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_H264,
.pix_fmt = AV_PIX_FMT_VDA,
.alloc_frame = ff_videotoolbox_alloc_frame,
.start_frame = ff_videotoolbox_h264_start_frame,
.decode_slice = ff_videotoolbox_h264_decode_slice,
.end_frame = vda_h264_end_frame,
.uninit = ff_videotoolbox_uninit,
.priv_data_size = sizeof(VTContext),
};
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