260 lines
8.7 KiB
C
260 lines
8.7 KiB
C
/*
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* VDA hardware acceleration
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*
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* copyright (c) 2011 Sebastien Zwickert
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <pthread.h>
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#include <CoreFoundation/CFDictionary.h>
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#include <CoreFoundation/CFNumber.h>
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#include <CoreFoundation/CFData.h>
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#include <CoreFoundation/CFString.h>
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#include "libavutil/avutil.h"
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#include "vda_internal.h"
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/* helper to create a dictionary according to the given pts */
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static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
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{
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CFStringRef key = CFSTR("FF_VDA_DECODER_PTS_KEY");
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CFNumberRef value = CFNumberCreate(kCFAllocatorDefault,
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kCFNumberSInt64Type, &i_pts);
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CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
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(const void **)&key,
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(const void **)&value,
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1,
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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CFRelease(value);
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return user_info;
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}
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/* helper to retrieve the pts from the given dictionary */
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static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
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{
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CFNumberRef pts;
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int64_t outValue = 0;
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if (!user_info)
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return 0;
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pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));
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if (pts)
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CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);
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return outValue;
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}
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/* Remove and release all frames from the queue. */
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static void vda_clear_queue(struct vda_context *vda_ctx)
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{
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vda_frame *top_frame;
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pthread_mutex_lock(&vda_ctx->queue_mutex);
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while (vda_ctx->queue) {
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top_frame = vda_ctx->queue;
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vda_ctx->queue = top_frame->next_frame;
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ff_vda_release_vda_frame(top_frame);
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}
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pthread_mutex_unlock(&vda_ctx->queue_mutex);
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}
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/* Decoder callback that adds the VDA frame to the queue in display order. */
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static void vda_decoder_callback(void *vda_hw_ctx,
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CFDictionaryRef user_info,
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OSStatus status,
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uint32_t infoFlags,
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CVImageBufferRef image_buffer)
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{
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struct vda_context *vda_ctx = vda_hw_ctx;
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vda_frame *new_frame;
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vda_frame *queue_walker;
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if (!image_buffer)
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return;
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if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
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return;
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if (!(new_frame = av_mallocz(sizeof(vda_frame))))
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return;
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new_frame->next_frame = NULL;
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new_frame->cv_buffer = CVPixelBufferRetain(image_buffer);
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new_frame->pts = vda_pts_from_dictionary(user_info);
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pthread_mutex_lock(&vda_ctx->queue_mutex);
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queue_walker = vda_ctx->queue;
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if (!queue_walker || new_frame->pts < queue_walker->pts) {
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/* we have an empty queue, or this frame earlier than the current queue head */
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new_frame->next_frame = queue_walker;
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vda_ctx->queue = new_frame;
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} else {
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/* walk the queue and insert this frame where it belongs in display order */
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vda_frame *next_frame;
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while (1) {
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next_frame = queue_walker->next_frame;
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if (!next_frame || new_frame->pts < next_frame->pts) {
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new_frame->next_frame = next_frame;
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queue_walker->next_frame = new_frame;
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break;
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}
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queue_walker = next_frame;
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}
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}
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pthread_mutex_unlock(&vda_ctx->queue_mutex);
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}
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int ff_vda_create_decoder(struct vda_context *vda_ctx,
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uint8_t *extradata,
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int extradata_size)
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{
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OSStatus status = kVDADecoderNoErr;
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CFNumberRef height;
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CFNumberRef width;
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CFNumberRef format;
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CFDataRef avc_data;
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CFMutableDictionaryRef config_info;
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CFMutableDictionaryRef buffer_attributes;
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CFMutableDictionaryRef io_surface_properties;
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CFNumberRef cv_pix_fmt;
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pthread_mutex_init(&vda_ctx->queue_mutex, NULL);
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config_info = CFDictionaryCreateMutable(kCFAllocatorDefault,
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4,
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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height = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->height);
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width = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->width);
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format = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt32Type, &vda_ctx->format);
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avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);
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CFDictionarySetValue(config_info, kVDADecoderConfiguration_Height, height);
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CFDictionarySetValue(config_info, kVDADecoderConfiguration_Width, width);
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CFDictionarySetValue(config_info, kVDADecoderConfiguration_SourceFormat, format);
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CFDictionarySetValue(config_info, kVDADecoderConfiguration_avcCData, avc_data);
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buffer_attributes = CFDictionaryCreateMutable(kCFAllocatorDefault,
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2,
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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io_surface_properties = CFDictionaryCreateMutable(kCFAllocatorDefault,
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0,
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&kCFTypeDictionaryKeyCallBacks,
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&kCFTypeDictionaryValueCallBacks);
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cv_pix_fmt = CFNumberCreate(kCFAllocatorDefault,
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kCFNumberSInt32Type,
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&vda_ctx->cv_pix_fmt_type);
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CFDictionarySetValue(buffer_attributes,
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kCVPixelBufferPixelFormatTypeKey,
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cv_pix_fmt);
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CFDictionarySetValue(buffer_attributes,
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kCVPixelBufferIOSurfacePropertiesKey,
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io_surface_properties);
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status = VDADecoderCreate(config_info,
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buffer_attributes,
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vda_decoder_callback,
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vda_ctx,
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&vda_ctx->decoder);
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CFRelease(height);
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CFRelease(width);
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CFRelease(format);
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CFRelease(avc_data);
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CFRelease(config_info);
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CFRelease(io_surface_properties);
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CFRelease(cv_pix_fmt);
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CFRelease(buffer_attributes);
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if (kVDADecoderNoErr != status)
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return status;
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return 0;
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}
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int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
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{
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OSStatus status = kVDADecoderNoErr;
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if (vda_ctx->decoder)
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status = VDADecoderDestroy(vda_ctx->decoder);
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vda_clear_queue(vda_ctx);
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pthread_mutex_destroy(&vda_ctx->queue_mutex);
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if (kVDADecoderNoErr != status)
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return status;
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return 0;
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}
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vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
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{
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vda_frame *top_frame;
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if (!vda_ctx->queue)
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return NULL;
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pthread_mutex_lock(&vda_ctx->queue_mutex);
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top_frame = vda_ctx->queue;
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vda_ctx->queue = top_frame->next_frame;
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pthread_mutex_unlock(&vda_ctx->queue_mutex);
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return top_frame;
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}
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void ff_vda_release_vda_frame(vda_frame *frame)
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{
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if (frame) {
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CVPixelBufferRelease(frame->cv_buffer);
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av_freep(&frame);
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}
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}
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int ff_vda_decoder_decode(struct vda_context *vda_ctx,
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uint8_t *bitstream,
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int bitstream_size,
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int64_t frame_pts)
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{
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OSStatus status = kVDADecoderNoErr;
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CFDictionaryRef user_info;
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CFDataRef coded_frame;
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coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
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user_info = vda_dictionary_with_pts(frame_pts);
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status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);
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CFRelease(user_info);
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CFRelease(coded_frame);
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if (kVDADecoderNoErr != status)
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return status;
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return 0;
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}
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