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FFmpeg/libavcodec/vda_h264.c
Stefano Pigozzi e7c5e17d4f vda: Make output CVPixelBuffer format configurable 
This is useful for client programs to ask for nv12 surfaces instead of the
current default (uyvy), since those are more efficient to decode to.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
2015-05-13 17:39:37 +02:00

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/*
* VDA H.264 hardware acceleration
*
* copyright (c) 2011 Sebastien Zwickert
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <CoreFoundation/CFNumber.h>
#include <CoreFoundation/CFData.h>
#include <CoreFoundation/CFString.h>
#include "libavutil/avutil.h"
#include "h264.h"
#include "internal.h"
#include "vda.h"
#include "vda_internal.h"
typedef struct VDAContext {
// The current bitstream buffer.
uint8_t *bitstream;
// The current size of the bitstream.
int bitstream_size;
// The reference size used for fast reallocation.
int allocated_size;
CVImageBufferRef frame;
} VDAContext;
/* 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(VDAContext *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)
{
VDAContext *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)
{
VDAContext *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 int vda_old_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
VDAContext *vda = avctx->internal->hwaccel_priv_data;
struct vda_context *vda_ctx = avctx->hwaccel_context;
AVFrame *frame = h->cur_pic_ptr->f;
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);
return status;
}
int ff_vda_create_decoder(struct vda_context *vda_ctx,
uint8_t *extradata,
int extradata_size)
{
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;
/* Each VCL NAL in the bistream 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;
}
static int vda_h264_uninit(AVCodecContext *avctx)
{
VDAContext *vda = avctx->internal->hwaccel_priv_data;
av_freep(&vda->bitstream);
if (vda->frame)
CVPixelBufferRelease(vda->frame);
return 0;
}
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 = vda_h264_uninit,
.priv_data_size = sizeof(VDAContext),
};
void ff_vda_output_callback(void *opaque,
CFDictionaryRef user_info,
OSStatus status,
uint32_t infoFlags,
CVImageBufferRef image_buffer)
{
AVCodecContext *ctx = opaque;
VDAContext *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_start_frame(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
VDAContext *vda = avctx->internal->hwaccel_priv_data;
vda->bitstream_size = 0;
return 0;
}
static int vda_h264_decode_slice(AVCodecContext *avctx,
const uint8_t *buffer,
uint32_t size)
{
VDAContext *vda = avctx->internal->hwaccel_priv_data;
void *tmp;
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 release_buffer(void *opaque, uint8_t *data)
{
CVImageBufferRef frame = (CVImageBufferRef)data;
CVPixelBufferRelease(frame);
}
static int vda_h264_end_frame(AVCodecContext *avctx)
{
H264Context *h = avctx->priv_data;
VDAContext *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;
}
av_buffer_unref(&frame->buf[0]);
frame->buf[0] = av_buffer_create((uint8_t*)vda->frame,
sizeof(vda->frame),
release_buffer, NULL,
AV_BUFFER_FLAG_READONLY);
if (!frame->buf)
return AVERROR(ENOMEM);
frame->data[3] = (uint8_t*)vda->frame;
vda->frame = NULL;
return 0;
}
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;
/* Each VCL NAL in the bistream 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 (avctx->extradata_size >= 4 && (avctx->extradata[4] & 0x03) != 0x03) {
uint8_t *rw_extradata;
if (!(rw_extradata = av_malloc(avctx->extradata_size)))
return AVERROR(ENOMEM);
memcpy(rw_extradata, avctx->extradata, avctx->extradata_size);
rw_extradata[4] |= 0x03;
avc_data = CFDataCreate(kCFAllocatorDefault, rw_extradata, avctx->extradata_size);
av_freep(&rw_extradata);
} else {
avc_data = CFDataCreate(kCFAllocatorDefault,
avctx->extradata, avctx->extradata_size);
}
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;
}
}
static int vda_h264_alloc_frame(AVCodecContext *avctx, AVFrame *frame)
{
frame->width = avctx->width;
frame->height = avctx->height;
frame->format = avctx->pix_fmt;
frame->buf[0] = av_buffer_alloc(1);
if (!frame->buf[0])
return AVERROR(ENOMEM);
return 0;
}
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 = vda_h264_alloc_frame,
.start_frame = vda_h264_start_frame,
.decode_slice = vda_h264_decode_slice,
.end_frame = vda_h264_end_frame,
.uninit = vda_h264_uninit,
.priv_data_size = sizeof(VDAContext),
};
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