mirror of https://git.ffmpeg.org/ffmpeg.git
264 lines
8.5 KiB
C
264 lines
8.5 KiB
C
/*
|
|
* 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;
|
|
};
|
|
|
|
/* 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 (!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(struct vda_context *vda_ctx)
|
|
{
|
|
OSStatus status;
|
|
CFDataRef coded_frame;
|
|
uint32_t flush_flags = 1 << 0; ///< kVDADecoderFlush_emitFrames
|
|
|
|
coded_frame = CFDataCreate(kCFAllocatorDefault,
|
|
vda_ctx->priv_bitstream,
|
|
vda_ctx->priv_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_h264_start_frame(AVCodecContext *avctx,
|
|
av_unused const uint8_t *buffer,
|
|
av_unused uint32_t size)
|
|
{
|
|
struct vda_context *vda_ctx = avctx->hwaccel_context;
|
|
|
|
if (!vda_ctx->decoder)
|
|
return -1;
|
|
|
|
vda_ctx->priv_bitstream_size = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vda_h264_decode_slice(AVCodecContext *avctx,
|
|
const uint8_t *buffer,
|
|
uint32_t size)
|
|
{
|
|
struct vda_context *vda_ctx = avctx->hwaccel_context;
|
|
void *tmp;
|
|
|
|
if (!vda_ctx->decoder)
|
|
return -1;
|
|
|
|
tmp = av_fast_realloc(vda_ctx->priv_bitstream,
|
|
&vda_ctx->priv_allocated_size,
|
|
vda_ctx->priv_bitstream_size + size + 4);
|
|
if (!tmp)
|
|
return AVERROR(ENOMEM);
|
|
|
|
vda_ctx->priv_bitstream = tmp;
|
|
|
|
AV_WB32(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size, size);
|
|
memcpy(vda_ctx->priv_bitstream + vda_ctx->priv_bitstream_size + 4, buffer, size);
|
|
|
|
vda_ctx->priv_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_h264_end_frame(AVCodecContext *avctx)
|
|
{
|
|
H264Context *h = avctx->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_ctx->priv_bitstream)
|
|
return -1;
|
|
|
|
status = vda_sync_decode(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,
|
|
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);
|
|
|
|
av_freep(&vda_ctx->priv_bitstream);
|
|
|
|
return status;
|
|
}
|
|
|
|
AVHWAccel ff_h264_vda_hwaccel = {
|
|
.name = "h264_vda",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_H264,
|
|
.pix_fmt = AV_PIX_FMT_VDA_VLD,
|
|
.start_frame = vda_h264_start_frame,
|
|
.decode_slice = vda_h264_decode_slice,
|
|
.end_frame = vda_h264_end_frame,
|
|
};
|