libavcodec/vda_h264_dec.c - nest-android-app/ffmpeg - Git at Google

 /*
  * Copyright (c) 2012, Xidorn Quan
  *
  * 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
  */

 /**
  * @file
  * H.264 decoder via VDA
  * @author Xidorn Quan <quanxunzhen@gmail.com>
  */

 #include <string.h>
 #include <CoreFoundation/CoreFoundation.h>

 #include "vda.h"
 #include "h264.h"
 #include "avcodec.h"

 #ifndef kCFCoreFoundationVersionNumber10_7
 #define kCFCoreFoundationVersionNumber10_7      635.00
 #endif

 extern AVCodec ff_h264_decoder, ff_h264_vda_decoder;

 static const enum AVPixelFormat vda_pixfmts_prior_10_7[] = {
     AV_PIX_FMT_UYVY422,
     AV_PIX_FMT_YUV420P,
     AV_PIX_FMT_NONE
 };

 static const enum AVPixelFormat vda_pixfmts[] = {
     AV_PIX_FMT_UYVY422,
     AV_PIX_FMT_YUYV422,
     AV_PIX_FMT_NV12,
     AV_PIX_FMT_YUV420P,
     AV_PIX_FMT_NONE
 };

 typedef struct {
     H264Context h264ctx;
     int h264_initialized;
     struct vda_context vda_ctx;
     enum AVPixelFormat pix_fmt;

     /* for backing-up fields set by user.
      * we have to gain full control of such fields here */
     void *hwaccel_context;
     enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
     int (*get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags);
 } VDADecoderContext;

 static enum AVPixelFormat get_format(struct AVCodecContext *avctx,
         const enum AVPixelFormat *fmt)
 {
     return AV_PIX_FMT_VDA_VLD;
 }

 typedef struct {
     CVPixelBufferRef cv_buffer;
 } VDABufferContext;

 static void release_buffer(void *opaque, uint8_t *data)
 {
     VDABufferContext *context = opaque;
     CVPixelBufferUnlockBaseAddress(context->cv_buffer, 0);
     CVPixelBufferRelease(context->cv_buffer);
     av_free(context);
 }

 static int get_buffer2(AVCodecContext *avctx, AVFrame *pic, int flag)
 {
     VDABufferContext *context = av_mallocz(sizeof(VDABufferContext));
     AVBufferRef *buffer = av_buffer_create(NULL, 0, release_buffer, context, 0);
     if (!context || !buffer) {
         av_free(context);
         return AVERROR(ENOMEM);
     }

     pic->buf[0] = buffer;
     pic->data[0] = (void *)1;
     return 0;
 }

 static inline void set_context(AVCodecContext *avctx)
 {
     VDADecoderContext *ctx = avctx->priv_data;
     ctx->hwaccel_context = avctx->hwaccel_context;
     avctx->hwaccel_context = &ctx->vda_ctx;
     ctx->get_format = avctx->get_format;
     avctx->get_format = get_format;
     ctx->get_buffer2 = avctx->get_buffer2;
     avctx->get_buffer2 = get_buffer2;
 }

 static inline void restore_context(AVCodecContext *avctx)
 {
     VDADecoderContext *ctx = avctx->priv_data;
     avctx->hwaccel_context = ctx->hwaccel_context;
     avctx->get_format = ctx->get_format;
     avctx->get_buffer2 = ctx->get_buffer2;
 }

 static int vdadec_decode(AVCodecContext *avctx,
         void *data, int *got_frame, AVPacket *avpkt)
 {
     VDADecoderContext *ctx = avctx->priv_data;
     AVFrame *pic = data;
     int ret;

     set_context(avctx);
     ret = ff_h264_decoder.decode(avctx, data, got_frame, avpkt);
     restore_context(avctx);
     if (*got_frame) {
         AVBufferRef *buffer = pic->buf[0];
         VDABufferContext *context = av_buffer_get_opaque(buffer);
         CVPixelBufferRef cv_buffer = (CVPixelBufferRef)pic->data[3];

         CVPixelBufferRetain(cv_buffer);
         CVPixelBufferLockBaseAddress(cv_buffer, 0);
         context->cv_buffer = cv_buffer;
         pic->format = ctx->pix_fmt;
         if (CVPixelBufferIsPlanar(cv_buffer)) {
             int i, count = CVPixelBufferGetPlaneCount(cv_buffer);
             av_assert0(count < 4);
             for (i = 0; i < count; i++) {
                 pic->data[i] = CVPixelBufferGetBaseAddressOfPlane(cv_buffer, i);
                 pic->linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(cv_buffer, i);
             }
         } else {
             pic->data[0] = CVPixelBufferGetBaseAddress(cv_buffer);
             pic->linesize[0] = CVPixelBufferGetBytesPerRow(cv_buffer);
         }
     }
     avctx->pix_fmt = ctx->pix_fmt;

     return ret;
 }

 static av_cold int vdadec_close(AVCodecContext *avctx)
 {
     VDADecoderContext *ctx = avctx->priv_data;
     /* release buffers and decoder */
     ff_vda_destroy_decoder(&ctx->vda_ctx);
     /* close H.264 decoder */
     if (ctx->h264_initialized) {
         set_context(avctx);
         ff_h264_decoder.close(avctx);
         restore_context(avctx);
     }
     return 0;
 }

 static av_cold int vdadec_init(AVCodecContext *avctx)
 {
     VDADecoderContext *ctx = avctx->priv_data;
     struct vda_context *vda_ctx = &ctx->vda_ctx;
     OSStatus status;
     int ret, i;

     ctx->h264_initialized = 0;

     /* init pix_fmts of codec */
     if (!ff_h264_vda_decoder.pix_fmts) {
         if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber10_7)
             ff_h264_vda_decoder.pix_fmts = vda_pixfmts_prior_10_7;
         else
             ff_h264_vda_decoder.pix_fmts = vda_pixfmts;
     }

     /* init vda */
     memset(vda_ctx, 0, sizeof(struct vda_context));
     vda_ctx->width = avctx->width;
     vda_ctx->height = avctx->height;
     vda_ctx->format = 'avc1';
     vda_ctx->use_sync_decoding = 1;
     vda_ctx->use_ref_buffer = 1;
     ctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);
     switch (ctx->pix_fmt) {
     case AV_PIX_FMT_UYVY422:
         vda_ctx->cv_pix_fmt_type = '2vuy';
         break;
     case AV_PIX_FMT_YUYV422:
         vda_ctx->cv_pix_fmt_type = 'yuvs';
         break;
     case AV_PIX_FMT_NV12:
         vda_ctx->cv_pix_fmt_type = '420v';
         break;
     case AV_PIX_FMT_YUV420P:
         vda_ctx->cv_pix_fmt_type = 'y420';
         break;
     default:
         av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format: %d\n", avctx->pix_fmt);
         goto failed;
     }
     status = ff_vda_create_decoder(vda_ctx,
                                    avctx->extradata, avctx->extradata_size);
     if (status != kVDADecoderNoErr) {
         av_log(avctx, AV_LOG_ERROR,
                 "Failed to init VDA decoder: %d.\n", status);
         goto failed;
     }

     /* init H.264 decoder */
     set_context(avctx);
     ret = ff_h264_decoder.init(avctx);
     restore_context(avctx);
     if (ret < 0) {
         av_log(avctx, AV_LOG_ERROR, "Failed to open H.264 decoder.\n");
         goto failed;
     }
     ctx->h264_initialized = 1;

     for (i = 0; i < MAX_SPS_COUNT; i++) {
         SPS *sps = ctx->h264ctx.sps_buffers[i];
         if (sps && (sps->bit_depth_luma != 8 ||
                 sps->chroma_format_idc == 2 ||
                 sps->chroma_format_idc == 3)) {
             av_log(avctx, AV_LOG_ERROR, "Format is not supported.\n");
             goto failed;
         }
     }

     return 0;

 failed:
     vdadec_close(avctx);
     return -1;
 }

 static void vdadec_flush(AVCodecContext *avctx)
 {
     set_context(avctx);
     ff_h264_decoder.flush(avctx);
     restore_context(avctx);
 }

 AVCodec ff_h264_vda_decoder = {
     .name           = "h264_vda",
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = AV_CODEC_ID_H264,
     .priv_data_size = sizeof(VDADecoderContext),
     .init           = vdadec_init,
     .close          = vdadec_close,
     .decode         = vdadec_decode,
     .capabilities   = AV_CODEC_CAP_DELAY,
     .flush          = vdadec_flush,
     .long_name      = NULL_IF_CONFIG_SMALL("H.264 (VDA acceleration)"),
 };
	/*
	* Copyright (c) 2012, Xidorn Quan
	*
	* 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
	*/

	/**
	* @file
	* H.264 decoder via VDA
	* @author Xidorn Quan <quanxunzhen@gmail.com>
	*/

	#include <string.h>
	#include <CoreFoundation/CoreFoundation.h>

	#include "vda.h"
	#include "h264.h"
	#include "avcodec.h"

	#ifndef kCFCoreFoundationVersionNumber10_7
	#define kCFCoreFoundationVersionNumber10_7 635.00
	#endif

	extern AVCodec ff_h264_decoder, ff_h264_vda_decoder;

	static const enum AVPixelFormat vda_pixfmts_prior_10_7[] = {
	AV_PIX_FMT_UYVY422,
	AV_PIX_FMT_YUV420P,
	AV_PIX_FMT_NONE
	};

	static const enum AVPixelFormat vda_pixfmts[] = {
	AV_PIX_FMT_UYVY422,
	AV_PIX_FMT_YUYV422,
	AV_PIX_FMT_NV12,
	AV_PIX_FMT_YUV420P,
	AV_PIX_FMT_NONE
	};

	typedef struct {
	H264Context h264ctx;
	int h264_initialized;
	struct vda_context vda_ctx;
	enum AVPixelFormat pix_fmt;

	/* for backing-up fields set by user.
	* we have to gain full control of such fields here */
	void *hwaccel_context;
	enum AVPixelFormat (get_format)(struct AVCodecContext s, const enum AVPixelFormat * fmt);
	int (get_buffer2)(struct AVCodecContext s, AVFrame *frame, int flags);
	} VDADecoderContext;

	static enum AVPixelFormat get_format(struct AVCodecContext *avctx,
	const enum AVPixelFormat *fmt)
	{
	return AV_PIX_FMT_VDA_VLD;
	}

	typedef struct {
	CVPixelBufferRef cv_buffer;
	} VDABufferContext;

	static void release_buffer(void opaque, uint8_t data)
	{
	VDABufferContext *context = opaque;
	CVPixelBufferUnlockBaseAddress(context->cv_buffer, 0);
	CVPixelBufferRelease(context->cv_buffer);
	av_free(context);
	}

	static int get_buffer2(AVCodecContext avctx, AVFrame pic, int flag)
	{
	VDABufferContext *context = av_mallocz(sizeof(VDABufferContext));
	AVBufferRef *buffer = av_buffer_create(NULL, 0, release_buffer, context, 0);
	if (!context \|\| !buffer) {
	av_free(context);
	return AVERROR(ENOMEM);
	}

	pic->buf[0] = buffer;
	pic->data[0] = (void *)1;
	return 0;
	}

	static inline void set_context(AVCodecContext *avctx)
	{
	VDADecoderContext *ctx = avctx->priv_data;
	ctx->hwaccel_context = avctx->hwaccel_context;
	avctx->hwaccel_context = &ctx->vda_ctx;
	ctx->get_format = avctx->get_format;
	avctx->get_format = get_format;
	ctx->get_buffer2 = avctx->get_buffer2;
	avctx->get_buffer2 = get_buffer2;
	}

	static inline void restore_context(AVCodecContext *avctx)
	{
	VDADecoderContext *ctx = avctx->priv_data;
	avctx->hwaccel_context = ctx->hwaccel_context;
	avctx->get_format = ctx->get_format;
	avctx->get_buffer2 = ctx->get_buffer2;
	}

	static int vdadec_decode(AVCodecContext *avctx,
	void data, int got_frame, AVPacket *avpkt)
	{
	VDADecoderContext *ctx = avctx->priv_data;
	AVFrame *pic = data;
	int ret;

	set_context(avctx);
	ret = ff_h264_decoder.decode(avctx, data, got_frame, avpkt);
	restore_context(avctx);
	if (*got_frame) {
	AVBufferRef *buffer = pic->buf[0];
	VDABufferContext *context = av_buffer_get_opaque(buffer);
	CVPixelBufferRef cv_buffer = (CVPixelBufferRef)pic->data[3];

	CVPixelBufferRetain(cv_buffer);
	CVPixelBufferLockBaseAddress(cv_buffer, 0);
	context->cv_buffer = cv_buffer;
	pic->format = ctx->pix_fmt;
	if (CVPixelBufferIsPlanar(cv_buffer)) {
	int i, count = CVPixelBufferGetPlaneCount(cv_buffer);
	av_assert0(count < 4);
	for (i = 0; i < count; i++) {
	pic->data[i] = CVPixelBufferGetBaseAddressOfPlane(cv_buffer, i);
	pic->linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(cv_buffer, i);
	}
	} else {
	pic->data[0] = CVPixelBufferGetBaseAddress(cv_buffer);
	pic->linesize[0] = CVPixelBufferGetBytesPerRow(cv_buffer);
	}
	}
	avctx->pix_fmt = ctx->pix_fmt;

	return ret;
	}

	static av_cold int vdadec_close(AVCodecContext *avctx)
	{
	VDADecoderContext *ctx = avctx->priv_data;
	/* release buffers and decoder */
	ff_vda_destroy_decoder(&ctx->vda_ctx);
	/* close H.264 decoder */
	if (ctx->h264_initialized) {
	set_context(avctx);
	ff_h264_decoder.close(avctx);
	restore_context(avctx);
	}
	return 0;
	}

	static av_cold int vdadec_init(AVCodecContext *avctx)
	{
	VDADecoderContext *ctx = avctx->priv_data;
	struct vda_context *vda_ctx = &ctx->vda_ctx;
	OSStatus status;
	int ret, i;

	ctx->h264_initialized = 0;

	/* init pix_fmts of codec */
	if (!ff_h264_vda_decoder.pix_fmts) {
	if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber10_7)
	ff_h264_vda_decoder.pix_fmts = vda_pixfmts_prior_10_7;
	else
	ff_h264_vda_decoder.pix_fmts = vda_pixfmts;
	}

	/* init vda */
	memset(vda_ctx, 0, sizeof(struct vda_context));
	vda_ctx->width = avctx->width;
	vda_ctx->height = avctx->height;
	vda_ctx->format = 'avc1';
	vda_ctx->use_sync_decoding = 1;
	vda_ctx->use_ref_buffer = 1;
	ctx->pix_fmt = avctx->get_format(avctx, avctx->codec->pix_fmts);
	switch (ctx->pix_fmt) {
	case AV_PIX_FMT_UYVY422:
	vda_ctx->cv_pix_fmt_type = '2vuy';
	break;
	case AV_PIX_FMT_YUYV422:
	vda_ctx->cv_pix_fmt_type = 'yuvs';
	break;
	case AV_PIX_FMT_NV12:
	vda_ctx->cv_pix_fmt_type = '420v';
	break;
	case AV_PIX_FMT_YUV420P:
	vda_ctx->cv_pix_fmt_type = 'y420';
	break;
	default:
	av_log(avctx, AV_LOG_ERROR, "Unsupported pixel format: %d\n", avctx->pix_fmt);
	goto failed;
	}
	status = ff_vda_create_decoder(vda_ctx,
	avctx->extradata, avctx->extradata_size);
	if (status != kVDADecoderNoErr) {
	av_log(avctx, AV_LOG_ERROR,
	"Failed to init VDA decoder: %d.\n", status);
	goto failed;
	}

	/* init H.264 decoder */
	set_context(avctx);
	ret = ff_h264_decoder.init(avctx);
	restore_context(avctx);
	if (ret < 0) {
	av_log(avctx, AV_LOG_ERROR, "Failed to open H.264 decoder.\n");
	goto failed;
	}
	ctx->h264_initialized = 1;

	for (i = 0; i < MAX_SPS_COUNT; i++) {
	SPS *sps = ctx->h264ctx.sps_buffers[i];
	if (sps && (sps->bit_depth_luma != 8 \|\|
	sps->chroma_format_idc == 2 \|\|
	sps->chroma_format_idc == 3)) {
	av_log(avctx, AV_LOG_ERROR, "Format is not supported.\n");
	goto failed;
	}
	}

	return 0;

	failed:
	vdadec_close(avctx);
	return -1;
	}

	static void vdadec_flush(AVCodecContext *avctx)
	{
	set_context(avctx);
	ff_h264_decoder.flush(avctx);
	restore_context(avctx);
	}

	AVCodec ff_h264_vda_decoder = {
	.name = "h264_vda",
	.type = AVMEDIA_TYPE_VIDEO,
	.id = AV_CODEC_ID_H264,
	.priv_data_size = sizeof(VDADecoderContext),
	.init = vdadec_init,
	.close = vdadec_close,
	.decode = vdadec_decode,
	.capabilities = AV_CODEC_CAP_DELAY,
	.flush = vdadec_flush,
	.long_name = NULL_IF_CONFIG_SMALL("H.264 (VDA acceleration)"),
	};