libavcodec/vda.c - third_party/ffmpeg - Git at Google

 /*
  * VDA 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 <pthread.h>
 #include <CoreFoundation/CFDictionary.h>
 #include <CoreFoundation/CFNumber.h>
 #include <CoreFoundation/CFData.h>
 #include <CoreFoundation/CFString.h>

 #include "libavutil/avutil.h"
 #include "vda_internal.h"

 /* Helper to create a dictionary according to the given pts. */
 static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
 {
     CFStringRef key = CFSTR("FF_VDA_DECODER_PTS_KEY");
     CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type, &i_pts);
     CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
                                                    (const void **)&key,
                                                    (const void **)&value,
                                                    1,
                                                    &kCFTypeDictionaryKeyCallBacks,
                                                    &kCFTypeDictionaryValueCallBacks);
     CFRelease(value);
     return user_info;
 }

 /* Helper to retrieve the pts from the given dictionary. */
 static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
 {
     CFNumberRef pts;
     int64_t outValue = 0;

     if (!user_info)
         return 0;

     pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));

     if (pts)
         CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);

     return outValue;
 }

 /* Removes and releases all frames from the queue. */
 static void vda_clear_queue(struct vda_context *vda_ctx)
 {
     vda_frame *top_frame;

     pthread_mutex_lock(&vda_ctx->queue_mutex);

     while (vda_ctx->queue) {
         top_frame = vda_ctx->queue;
         vda_ctx->queue = top_frame->next_frame;
         ff_vda_release_vda_frame(top_frame);
     }

     pthread_mutex_unlock(&vda_ctx->queue_mutex);
 }


 /* 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 = (struct vda_context*)vda_hw_ctx;
     vda_frame *new_frame;
     vda_frame *queue_walker;

     if (!image_buffer)
         return;

     if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
         return;

     new_frame = av_mallocz(sizeof(vda_frame));
     if (!new_frame)
         return;

     new_frame->next_frame = NULL;
     new_frame->cv_buffer = CVPixelBufferRetain(image_buffer);
     new_frame->pts = vda_pts_from_dictionary(user_info);

     pthread_mutex_lock(&vda_ctx->queue_mutex);

     queue_walker = vda_ctx->queue;

     if (!queue_walker || (new_frame->pts < queue_walker->pts)) {
         /* we have an empty queue, or this frame earlier than the current queue head */
         new_frame->next_frame = queue_walker;
         vda_ctx->queue = new_frame;
     } else {
         /* walk the queue and insert this frame where it belongs in display order */
         vda_frame *next_frame;

         while (1) {
             next_frame = queue_walker->next_frame;

             if (!next_frame || (new_frame->pts < next_frame->pts)) {
                 new_frame->next_frame = next_frame;
                 queue_walker->next_frame = new_frame;
                 break;
             }
             queue_walker = next_frame;
         }
     }

     pthread_mutex_unlock(&vda_ctx->queue_mutex);
 }

 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;

     vda_ctx->bitstream = NULL;
     vda_ctx->ref_size = 0;

     pthread_mutex_init(&vda_ctx->queue_mutex, NULL);

     if (extradata[4]==0xFE) {
         // convert 3 byte NAL sizes to 4 byte
         extradata[4] = 0xFF;
     }

     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);
     avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);

     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);

     if (kVDADecoderNoErr != status)
         return status;

     return 0;
 }

 int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
 {
     OSStatus status = kVDADecoderNoErr;

     if (vda_ctx->decoder)
         status = VDADecoderDestroy(vda_ctx->decoder);

     vda_clear_queue(vda_ctx);

     pthread_mutex_destroy(&vda_ctx->queue_mutex);

     if (vda_ctx->bitstream)
         av_freep(&vda_ctx->bitstream);

     if (kVDADecoderNoErr != status)
         return status;

     return 0;
 }

 vda_frame *ff_vda_queue_pop(struct vda_context *vda_ctx)
 {
     vda_frame *top_frame;

     if (!vda_ctx->queue)
         return NULL;

     pthread_mutex_lock(&vda_ctx->queue_mutex);
     top_frame = vda_ctx->queue;
     vda_ctx->queue = top_frame->next_frame;
     pthread_mutex_unlock(&vda_ctx->queue_mutex);

     return top_frame;
 }

 void ff_vda_release_vda_frame(vda_frame *frame)
 {
     if (frame) {
         CVPixelBufferRelease(frame->cv_buffer);
         av_freep(&frame);
     }
 }

 int ff_vda_decoder_decode(struct vda_context *vda_ctx,
                           uint8_t *bitstream,
                           int bitstream_size,
                           int64_t frame_pts)
 {
     OSStatus status = kVDADecoderNoErr;
     CFDictionaryRef user_info;
     CFDataRef coded_frame;

     coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
     user_info = vda_dictionary_with_pts(frame_pts);

     status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);

     CFRelease(user_info);
     CFRelease(coded_frame);

     if (kVDADecoderNoErr != status)
         return status;

     return 0;
 }
	/*
	* VDA 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 <pthread.h>
	#include <CoreFoundation/CFDictionary.h>
	#include <CoreFoundation/CFNumber.h>
	#include <CoreFoundation/CFData.h>
	#include <CoreFoundation/CFString.h>

	#include "libavutil/avutil.h"
	#include "vda_internal.h"

	/* Helper to create a dictionary according to the given pts. */
	static CFDictionaryRef vda_dictionary_with_pts(int64_t i_pts)
	{
	CFStringRef key = CFSTR("FF_VDA_DECODER_PTS_KEY");
	CFNumberRef value = CFNumberCreate(kCFAllocatorDefault, kCFNumberSInt64Type, &i_pts);
	CFDictionaryRef user_info = CFDictionaryCreate(kCFAllocatorDefault,
	(const void **)&key,
	(const void **)&value,
	1,
	&kCFTypeDictionaryKeyCallBacks,
	&kCFTypeDictionaryValueCallBacks);
	CFRelease(value);
	return user_info;
	}

	/* Helper to retrieve the pts from the given dictionary. */
	static int64_t vda_pts_from_dictionary(CFDictionaryRef user_info)
	{
	CFNumberRef pts;
	int64_t outValue = 0;

	if (!user_info)
	return 0;

	pts = CFDictionaryGetValue(user_info, CFSTR("FF_VDA_DECODER_PTS_KEY"));

	if (pts)
	CFNumberGetValue(pts, kCFNumberSInt64Type, &outValue);

	return outValue;
	}

	/* Removes and releases all frames from the queue. */
	static void vda_clear_queue(struct vda_context *vda_ctx)
	{
	vda_frame *top_frame;

	pthread_mutex_lock(&vda_ctx->queue_mutex);

	while (vda_ctx->queue) {
	top_frame = vda_ctx->queue;
	vda_ctx->queue = top_frame->next_frame;
	ff_vda_release_vda_frame(top_frame);
	}

	pthread_mutex_unlock(&vda_ctx->queue_mutex);
	}


	/* 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 = (struct vda_context)vda_hw_ctx;
	vda_frame *new_frame;
	vda_frame *queue_walker;

	if (!image_buffer)
	return;

	if (vda_ctx->cv_pix_fmt_type != CVPixelBufferGetPixelFormatType(image_buffer))
	return;

	new_frame = av_mallocz(sizeof(vda_frame));
	if (!new_frame)
	return;

	new_frame->next_frame = NULL;
	new_frame->cv_buffer = CVPixelBufferRetain(image_buffer);
	new_frame->pts = vda_pts_from_dictionary(user_info);

	pthread_mutex_lock(&vda_ctx->queue_mutex);

	queue_walker = vda_ctx->queue;

	if (!queue_walker \|\| (new_frame->pts < queue_walker->pts)) {
	/* we have an empty queue, or this frame earlier than the current queue head */
	new_frame->next_frame = queue_walker;
	vda_ctx->queue = new_frame;
	} else {
	/* walk the queue and insert this frame where it belongs in display order */
	vda_frame *next_frame;

	while (1) {
	next_frame = queue_walker->next_frame;

	if (!next_frame \|\| (new_frame->pts < next_frame->pts)) {
	new_frame->next_frame = next_frame;
	queue_walker->next_frame = new_frame;
	break;
	}
	queue_walker = next_frame;
	}
	}

	pthread_mutex_unlock(&vda_ctx->queue_mutex);
	}

	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;

	vda_ctx->bitstream = NULL;
	vda_ctx->ref_size = 0;

	pthread_mutex_init(&vda_ctx->queue_mutex, NULL);

	if (extradata[4]==0xFE) {
	// convert 3 byte NAL sizes to 4 byte
	extradata[4] = 0xFF;
	}

	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);
	avc_data = CFDataCreate(kCFAllocatorDefault, extradata, extradata_size);

	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);

	if (kVDADecoderNoErr != status)
	return status;

	return 0;
	}

	int ff_vda_destroy_decoder(struct vda_context *vda_ctx)
	{
	OSStatus status = kVDADecoderNoErr;

	if (vda_ctx->decoder)
	status = VDADecoderDestroy(vda_ctx->decoder);

	vda_clear_queue(vda_ctx);

	pthread_mutex_destroy(&vda_ctx->queue_mutex);

	if (vda_ctx->bitstream)
	av_freep(&vda_ctx->bitstream);

	if (kVDADecoderNoErr != status)
	return status;

	return 0;
	}

	vda_frame ff_vda_queue_pop(struct vda_context vda_ctx)
	{
	vda_frame *top_frame;

	if (!vda_ctx->queue)
	return NULL;

	pthread_mutex_lock(&vda_ctx->queue_mutex);
	top_frame = vda_ctx->queue;
	vda_ctx->queue = top_frame->next_frame;
	pthread_mutex_unlock(&vda_ctx->queue_mutex);

	return top_frame;
	}

	void ff_vda_release_vda_frame(vda_frame *frame)
	{
	if (frame) {
	CVPixelBufferRelease(frame->cv_buffer);
	av_freep(&frame);
	}
	}

	int ff_vda_decoder_decode(struct vda_context *vda_ctx,
	uint8_t *bitstream,
	int bitstream_size,
	int64_t frame_pts)
	{
	OSStatus status = kVDADecoderNoErr;
	CFDictionaryRef user_info;
	CFDataRef coded_frame;

	coded_frame = CFDataCreate(kCFAllocatorDefault, bitstream, bitstream_size);
	user_info = vda_dictionary_with_pts(frame_pts);

	status = VDADecoderDecode(vda_ctx->decoder, 0, coded_frame, user_info);

	CFRelease(user_info);
	CFRelease(coded_frame);

	if (kVDADecoderNoErr != status)
	return status;

	return 0;
	}