272 lines
8.1 KiB
C
272 lines
8.1 KiB
C
/*
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* VDA HW 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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 "vda_internal.h"
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/**
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* \addtogroup VDA_Decoding
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*
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* @{
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*/
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/* Mutex manager callback. */
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static int vda_lock_operation(void **mtx, enum AVLockOp op)
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{
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switch(op)
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{
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case AV_LOCK_CREATE:
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*mtx = av_malloc(sizeof(pthread_mutex_t));
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if(!*mtx)
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return 1;
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return !!pthread_mutex_init(*mtx, NULL);
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case AV_LOCK_OBTAIN:
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return !!pthread_mutex_lock(*mtx);
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case AV_LOCK_RELEASE:
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return !!pthread_mutex_unlock(*mtx);
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case AV_LOCK_DESTROY:
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pthread_mutex_destroy(*mtx);
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av_freep(mtx);
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return 0;
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}
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return 1;
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}
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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, 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 (NULL == 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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/* Removes and releases 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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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
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while (vda_ctx->queue != NULL)
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{
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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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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
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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 = (struct vda_context*)vda_hw_ctx;
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vda_frame *new_frame;
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vda_frame *queue_walker;
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if (NULL == image_buffer)
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return;
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if (kCVPixelFormatType_422YpCbCr8 != CVPixelBufferGetPixelFormatType(image_buffer))
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return;
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new_frame = (vda_frame *)av_mallocz(sizeof(vda_frame));
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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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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
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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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{
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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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}
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else
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{
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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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{
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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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{
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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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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
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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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if (av_lockmgr_register(vda_lock_operation))
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return -1;
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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_CREATE);
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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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status = VDADecoderCreate( config_info,
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NULL,
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(VDADecoderOutputCallback *)vda_decoder_callback,
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(void *)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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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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if (vda_ctx->queue_mutex != NULL)
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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_DESTROY);
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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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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_OBTAIN);
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top_frame = vda_ctx->queue;
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vda_ctx->queue = top_frame->next_frame;
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vda_lock_operation(&vda_ctx->queue_mutex, AV_LOCK_RELEASE);
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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 != NULL)
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{
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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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/* @} */
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