libavcodec/libutvideoenc.cpp - nest-android-app/ffmpeg - Git at Google

 /*
  * Copyright (c) 2012 Derek Buitenhuis
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public
  * License as published by the Free Software Foundation;
  * version 2 of the License.
  *
  * 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
  * General Public License for more details.
  *
  * You should have received a copy of the GNU 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
  * Known FOURCCs:
  *     'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA),
  *     'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
  */

 extern "C" {
 #include "libavutil/opt.h"
 #include "libavutil/avassert.h"
 #include "libavutil/imgutils.h"
 #include "avcodec.h"
 #include "internal.h"
 }

 #include "libutvideo.h"
 #include "put_bits.h"

 static av_cold int utvideo_encode_init(AVCodecContext *avctx)
 {
     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
     UtVideoExtra *info;
     uint32_t flags, in_format;
     int ret;

     switch (avctx->pix_fmt) {
     case AV_PIX_FMT_YUV420P:
         in_format = UTVF_YV12;
         avctx->bits_per_coded_sample = 12;
         if (avctx->colorspace == AVCOL_SPC_BT709)
             avctx->codec_tag = MKTAG('U', 'L', 'H', '0');
         else
             avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
         break;
     case AV_PIX_FMT_YUYV422:
         in_format = UTVF_YUYV;
         avctx->bits_per_coded_sample = 16;
         if (avctx->colorspace == AVCOL_SPC_BT709)
             avctx->codec_tag = MKTAG('U', 'L', 'H', '2');
         else
             avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
         break;
     case AV_PIX_FMT_BGR24:
         in_format = UTVF_NFCC_BGR_BU;
         avctx->bits_per_coded_sample = 24;
         avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
         break;
     case AV_PIX_FMT_RGB32:
         in_format = UTVF_NFCC_BGRA_BU;
         avctx->bits_per_coded_sample = 32;
         avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
         break;
     default:
         return AVERROR(EINVAL);
     }

 #if FF_API_PRIVATE_OPT
 FF_DISABLE_DEPRECATION_WARNINGS
     if (avctx->prediction_method)
         utv->pred = avctx->prediction_method;
 FF_ENABLE_DEPRECATION_WARNINGS
 #endif

     /* Check before we alloc anything */
     if (utv->pred != 0 && utv->pred != 2) {
         av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n");
         return AVERROR(EINVAL);
     }

     flags = ((utv->pred + 1) << 8) | (avctx->thread_count - 1);

     avctx->priv_data = utv;

     /* Alloc extradata buffer */
     info = (UtVideoExtra *)av_malloc(sizeof(*info));

     if (!info) {
         av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n");
         return AVERROR(ENOMEM);
     }

     /*
      * We use this buffer to hold the data that Ut Video returns,
      * since we cannot decode planes separately with it.
      */
     ret = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
     if (ret < 0) {
         av_free(info);
         return ret;
     }
     utv->buf_size = ret;

     utv->buffer = (uint8_t *)av_malloc(utv->buf_size);

     if (utv->buffer == NULL) {
         av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
         av_free(info);
         return AVERROR(ENOMEM);
     }

     /*
      * Create a Ut Video instance. Since the function wants
      * an "interface name" string, pass it the name of the lib.
      */
     utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");

     /* Initialize encoder */
     utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
                             CBGROSSWIDTH_WINDOWS);

     /* Get extradata from encoder */
     avctx->extradata_size = utv->codec->EncodeGetExtraDataSize();
     utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format,
                                    avctx->width, avctx->height,
                                    CBGROSSWIDTH_WINDOWS);
     avctx->extradata = (uint8_t *)info;

     /* Set flags */
     utv->codec->SetState(&flags, sizeof(flags));

     return 0;
 }

 static int utvideo_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
                                 const AVFrame *pic, int *got_packet)
 {
     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
     int w = avctx->width, h = avctx->height;
     int ret, rgb_size, i;
     bool keyframe;
     uint8_t *y, *u, *v;
     uint8_t *dst;

     /* Alloc buffer */
     if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size, 0)) < 0)
         return ret;

     dst = pkt->data;

     /* Move input if needed data into Ut Video friendly buffer */
     switch (avctx->pix_fmt) {
     case AV_PIX_FMT_YUV420P:
         y = utv->buffer;
         u = y + w * h;
         v = u + w * h / 4;
         for (i = 0; i < h; i++) {
             memcpy(y, pic->data[0] + i * pic->linesize[0], w);
             y += w;
         }
         for (i = 0; i < h / 2; i++) {
             memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1);
             memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1);
             u += w >> 1;
             v += w >> 1;
         }
         break;
     case AV_PIX_FMT_YUYV422:
         for (i = 0; i < h; i++)
             memcpy(utv->buffer + i * (w << 1),
                    pic->data[0] + i * pic->linesize[0], w << 1);
         break;
     case AV_PIX_FMT_BGR24:
     case AV_PIX_FMT_RGB32:
         /* Ut Video takes bottom-up BGR */
         rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4;
         for (i = 0; i < h; i++)
             memcpy(utv->buffer + (h - i - 1) * w * rgb_size,
                    pic->data[0] + i * pic->linesize[0],
                    w * rgb_size);
         break;
     default:
         return AVERROR(EINVAL);
     }

     /* Encode frame */
     pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);

     if (!pkt->size) {
         av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
         return AVERROR_INVALIDDATA;
     }

     /*
      * Ut Video is intra-only and every frame is a keyframe,
      * and the API always returns true. In case something
      * durastic changes in the future, such as inter support,
      * assert that this is true.
      */
     av_assert2(keyframe == true);

     pkt->flags |= AV_PKT_FLAG_KEY;
     *got_packet = 1;
     return 0;
 }

 static av_cold int utvideo_encode_close(AVCodecContext *avctx)
 {
     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;

     av_freep(&avctx->extradata);
     av_freep(&utv->buffer);

     utv->codec->EncodeEnd();
     CCodec::DeleteInstance(utv->codec);

     return 0;
 }

 #define OFFSET(x) offsetof(UtVideoContext, x)
 #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
 static const AVOption options[] = {
     { "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, 0, 0, 2, VE, "pred" },
     { "left",   NULL, 0, AV_OPT_TYPE_CONST, 0, INT_MIN, INT_MAX, VE, "pred" },
     { "median",   NULL, 0, AV_OPT_TYPE_CONST, 2, INT_MIN, INT_MAX, VE, "pred" },
     { NULL },
 };

 static const AVClass utvideo_class = {
     "libutvideo",
     av_default_item_name,
     options,
     LIBAVUTIL_VERSION_INT,
     0,
     0,
     NULL,
     NULL,
     AV_CLASS_CATEGORY_NA,
     NULL,
     NULL,
 };

 AVCodec ff_libutvideo_encoder = {
     "libutvideo",
     NULL_IF_CONFIG_SMALL("Ut Video"),
     AVMEDIA_TYPE_VIDEO,
     AV_CODEC_ID_UTVIDEO,
     AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_LOSSLESS | AV_CODEC_CAP_INTRA_ONLY,
     NULL, /* supported_framerates */
     (const enum AVPixelFormat[]) {
         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24,
         AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
     },
     NULL, /* supported_samplerates */
     NULL, /* sample_fmts */
     NULL, /* channel_layouts */
     0,    /* max_lowres */
     &utvideo_class, /* priv_class */
     NULL, /* profiles */
     sizeof(UtVideoContext),
     NULL, /* next */
     NULL, /* init_thread_copy */
     NULL, /* update_thread_context */
     NULL, /* defaults */
     NULL, /* init_static_data */
     utvideo_encode_init,
     NULL, /* encode */
     utvideo_encode_frame,
     NULL, /* decode */
     utvideo_encode_close,
     NULL, /* flush */
 };
	/*
	* Copyright (c) 2012 Derek Buitenhuis
	*
	* This file is part of FFmpeg.
	*
	* FFmpeg is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public
	* License as published by the Free Software Foundation;
	* version 2 of the License.
	*
	* 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
	* General Public License for more details.
	*
	* You should have received a copy of the GNU 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
	* Known FOURCCs:
	* 'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA),
	* 'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
	*/

	extern "C" {
	#include "libavutil/opt.h"
	#include "libavutil/avassert.h"
	#include "libavutil/imgutils.h"
	#include "avcodec.h"
	#include "internal.h"
	}

	#include "libutvideo.h"
	#include "put_bits.h"

	static av_cold int utvideo_encode_init(AVCodecContext *avctx)
	{
	UtVideoContext utv = (UtVideoContext )avctx->priv_data;
	UtVideoExtra *info;
	uint32_t flags, in_format;
	int ret;

	switch (avctx->pix_fmt) {
	case AV_PIX_FMT_YUV420P:
	in_format = UTVF_YV12;
	avctx->bits_per_coded_sample = 12;
	if (avctx->colorspace == AVCOL_SPC_BT709)
	avctx->codec_tag = MKTAG('U', 'L', 'H', '0');
	else
	avctx->codec_tag = MKTAG('U', 'L', 'Y', '0');
	break;
	case AV_PIX_FMT_YUYV422:
	in_format = UTVF_YUYV;
	avctx->bits_per_coded_sample = 16;
	if (avctx->colorspace == AVCOL_SPC_BT709)
	avctx->codec_tag = MKTAG('U', 'L', 'H', '2');
	else
	avctx->codec_tag = MKTAG('U', 'L', 'Y', '2');
	break;
	case AV_PIX_FMT_BGR24:
	in_format = UTVF_NFCC_BGR_BU;
	avctx->bits_per_coded_sample = 24;
	avctx->codec_tag = MKTAG('U', 'L', 'R', 'G');
	break;
	case AV_PIX_FMT_RGB32:
	in_format = UTVF_NFCC_BGRA_BU;
	avctx->bits_per_coded_sample = 32;
	avctx->codec_tag = MKTAG('U', 'L', 'R', 'A');
	break;
	default:
	return AVERROR(EINVAL);
	}

	#if FF_API_PRIVATE_OPT
	FF_DISABLE_DEPRECATION_WARNINGS
	if (avctx->prediction_method)
	utv->pred = avctx->prediction_method;
	FF_ENABLE_DEPRECATION_WARNINGS
	#endif

	/* Check before we alloc anything */
	if (utv->pred != 0 && utv->pred != 2) {
	av_log(avctx, AV_LOG_ERROR, "Invalid prediction method.\n");
	return AVERROR(EINVAL);
	}

	flags = ((utv->pred + 1) << 8) \| (avctx->thread_count - 1);

	avctx->priv_data = utv;

	/* Alloc extradata buffer */
	info = (UtVideoExtra )av_malloc(sizeof(info));

	if (!info) {
	av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata buffer.\n");
	return AVERROR(ENOMEM);
	}

	/*
	* We use this buffer to hold the data that Ut Video returns,
	* since we cannot decode planes separately with it.
	*/
	ret = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
	if (ret < 0) {
	av_free(info);
	return ret;
	}
	utv->buf_size = ret;

	utv->buffer = (uint8_t *)av_malloc(utv->buf_size);

	if (utv->buffer == NULL) {
	av_log(avctx, AV_LOG_ERROR, "Could not allocate output buffer.\n");
	av_free(info);
	return AVERROR(ENOMEM);
	}

	/*
	* Create a Ut Video instance. Since the function wants
	* an "interface name" string, pass it the name of the lib.
	*/
	utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");

	/* Initialize encoder */
	utv->codec->EncodeBegin(in_format, avctx->width, avctx->height,
	CBGROSSWIDTH_WINDOWS);

	/* Get extradata from encoder */
	avctx->extradata_size = utv->codec->EncodeGetExtraDataSize();
	utv->codec->EncodeGetExtraData(info, avctx->extradata_size, in_format,
	avctx->width, avctx->height,
	CBGROSSWIDTH_WINDOWS);
	avctx->extradata = (uint8_t *)info;

	/* Set flags */
	utv->codec->SetState(&flags, sizeof(flags));

	return 0;
	}

	static int utvideo_encode_frame(AVCodecContext avctx, AVPacket pkt,
	const AVFrame pic, int got_packet)
	{
	UtVideoContext utv = (UtVideoContext )avctx->priv_data;
	int w = avctx->width, h = avctx->height;
	int ret, rgb_size, i;
	bool keyframe;
	uint8_t y, u, *v;
	uint8_t *dst;

	/* Alloc buffer */
	if ((ret = ff_alloc_packet2(avctx, pkt, utv->buf_size, 0)) < 0)
	return ret;

	dst = pkt->data;

	/* Move input if needed data into Ut Video friendly buffer */
	switch (avctx->pix_fmt) {
	case AV_PIX_FMT_YUV420P:
	y = utv->buffer;
	u = y + w * h;
	v = u + w * h / 4;
	for (i = 0; i < h; i++) {
	memcpy(y, pic->data[0] + i * pic->linesize[0], w);
	y += w;
	}
	for (i = 0; i < h / 2; i++) {
	memcpy(u, pic->data[2] + i * pic->linesize[2], w >> 1);
	memcpy(v, pic->data[1] + i * pic->linesize[1], w >> 1);
	u += w >> 1;
	v += w >> 1;
	}
	break;
	case AV_PIX_FMT_YUYV422:
	for (i = 0; i < h; i++)
	memcpy(utv->buffer + i * (w << 1),
	pic->data[0] + i * pic->linesize[0], w << 1);
	break;
	case AV_PIX_FMT_BGR24:
	case AV_PIX_FMT_RGB32:
	/* Ut Video takes bottom-up BGR */
	rgb_size = avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4;
	for (i = 0; i < h; i++)
	memcpy(utv->buffer + (h - i - 1) * w * rgb_size,
	pic->data[0] + i * pic->linesize[0],
	w * rgb_size);
	break;
	default:
	return AVERROR(EINVAL);
	}

	/* Encode frame */
	pkt->size = utv->codec->EncodeFrame(dst, &keyframe, utv->buffer);

	if (!pkt->size) {
	av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed!\n");
	return AVERROR_INVALIDDATA;
	}

	/*
	* Ut Video is intra-only and every frame is a keyframe,
	* and the API always returns true. In case something
	* durastic changes in the future, such as inter support,
	* assert that this is true.
	*/
	av_assert2(keyframe == true);

	pkt->flags \|= AV_PKT_FLAG_KEY;
	*got_packet = 1;
	return 0;
	}

	static av_cold int utvideo_encode_close(AVCodecContext *avctx)
	{
	UtVideoContext utv = (UtVideoContext )avctx->priv_data;

	av_freep(&avctx->extradata);
	av_freep(&utv->buffer);

	utv->codec->EncodeEnd();
	CCodec::DeleteInstance(utv->codec);

	return 0;
	}

	#define OFFSET(x) offsetof(UtVideoContext, x)
	#define VE AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_ENCODING_PARAM
	static const AVOption options[] = {
	{ "pred", "Prediction method", OFFSET(pred), AV_OPT_TYPE_INT, 0, 0, 2, VE, "pred" },
	{ "left", NULL, 0, AV_OPT_TYPE_CONST, 0, INT_MIN, INT_MAX, VE, "pred" },
	{ "median", NULL, 0, AV_OPT_TYPE_CONST, 2, INT_MIN, INT_MAX, VE, "pred" },
	{ NULL },
	};

	static const AVClass utvideo_class = {
	"libutvideo",
	av_default_item_name,
	options,
	LIBAVUTIL_VERSION_INT,
	0,
	0,
	NULL,
	NULL,
	AV_CLASS_CATEGORY_NA,
	NULL,
	NULL,
	};

	AVCodec ff_libutvideo_encoder = {
	"libutvideo",
	NULL_IF_CONFIG_SMALL("Ut Video"),
	AVMEDIA_TYPE_VIDEO,
	AV_CODEC_ID_UTVIDEO,
	AV_CODEC_CAP_AUTO_THREADS \| AV_CODEC_CAP_LOSSLESS \| AV_CODEC_CAP_INTRA_ONLY,
	NULL, /* supported_framerates */
	(const enum AVPixelFormat[]) {
	AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUYV422, AV_PIX_FMT_BGR24,
	AV_PIX_FMT_RGB32, AV_PIX_FMT_NONE
	},
	NULL, /* supported_samplerates */
	NULL, /* sample_fmts */
	NULL, /* channel_layouts */
	0, /* max_lowres */
	&utvideo_class, /* priv_class */
	NULL, /* profiles */
	sizeof(UtVideoContext),
	NULL, /* next */
	NULL, /* init_thread_copy */
	NULL, /* update_thread_context */
	NULL, /* defaults */
	NULL, /* init_static_data */
	utvideo_encode_init,
	NULL, /* encode */
	utvideo_encode_frame,
	NULL, /* decode */
	utvideo_encode_close,
	NULL, /* flush */
	};