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

 /*
  * Copyright (c) 2011 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 "avcodec.h"
 #include "libavutil/imgutils.h"
 }

 #include "libutvideo.h"
 #include "get_bits.h"

 static av_cold int utvideo_decode_init(AVCodecContext *avctx)
 {
     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
     UtVideoExtra info;
     int format;
     int begin_ret;

     if (avctx->extradata_size != 16 && avctx->extradata_size != 8 ) {
         av_log(avctx, AV_LOG_ERROR, "Extradata size (%d) mismatch.\n", avctx->extradata_size);
         return -1;
     }

     /* Read extradata */
     info.version = AV_RL32(avctx->extradata);
     info.original_format = AV_RL32(avctx->extradata + 4);
     info.frameinfo_size = AV_RL32(avctx->extradata + 8);
     info.flags = AV_RL32(avctx->extradata + 12);

     /* Pick format based on FOURCC */
     switch (avctx->codec_tag) {
 #ifdef UTV_BT709
     case MKTAG('U', 'L', 'H', '0'):
         avctx->pix_fmt = AV_PIX_FMT_YUV420P;
         avctx->colorspace = AVCOL_SPC_BT709;
         format = UTVF_YV12;
         break;
     case MKTAG('U', 'L', 'H', '2'):
         avctx->pix_fmt = AV_PIX_FMT_YUYV422;
         avctx->colorspace = AVCOL_SPC_BT709;
         format = UTVF_YUY2;
         break;
 #endif
     case MKTAG('U', 'L', 'Y', '0'):
         avctx->pix_fmt = AV_PIX_FMT_YUV420P;
         format = UTVF_YV12;
         break;
     case MKTAG('U', 'L', 'Y', '2'):
         avctx->pix_fmt = AV_PIX_FMT_YUYV422;
         format = UTVF_YUY2;
         break;
     case MKTAG('U', 'L', 'R', 'G'):
         avctx->pix_fmt = AV_PIX_FMT_BGR24;
         format = UTVF_NFCC_BGR_BU;
         break;
     case MKTAG('U', 'L', 'R', 'A'):
         avctx->pix_fmt = AV_PIX_FMT_RGB32;
         format = UTVF_NFCC_BGRA_BU;
         break;
 #ifdef UTVF_UQY2
     case MKTAG('U', 'Q', 'Y', '2'):
         avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
         format = UTVF_v210;
         break;
 #endif
     default:
         av_log(avctx, AV_LOG_ERROR,
               "Not a Ut Video FOURCC: %X\n", avctx->codec_tag);
         return -1;
     }

     /* Only allocate the buffer once */
     utv->buf_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
 #ifdef UTVF_UQY2
     if (format == UTVF_v210)
         utv->buf_size += avctx->height * ((avctx->width + 47) / 48) * 128; // the linesize used by the decoder, this does not seem to be exported
 #endif
     utv->buffer = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t));

     if (utv->buffer == NULL) {
         av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n");
         return -1;
     }

     /* Allocate the output frame */
     avctx->coded_frame = av_frame_alloc();

     /* Ut Video only supports 8-bit */
     avctx->bits_per_raw_sample = 8;

     /* Is it interlaced? */
     avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0;

     /* Apparently Ut Video doesn't store this info... */
     avctx->coded_frame->top_field_first = 1;

     /*
      * 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 Decoding */
     begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height,
                             CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra));

     /* Check to see if the decoder initlized properly */
     if (begin_ret != 0) {
         av_log(avctx, AV_LOG_ERROR,
                "Could not initialize decoder: %d\n", begin_ret);
         return -1;
     }

     return 0;
 }

 static int utvideo_decode_frame(AVCodecContext *avctx, void *data,
                                 int *got_frame, AVPacket *avpkt)
 {
     UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
     AVFrame *pic = avctx->coded_frame;
     int w = avctx->width, h = avctx->height;

     /* Set flags */
     pic->pict_type = AV_PICTURE_TYPE_I;
     pic->key_frame = 1;

     /* Decode the frame */
     utv->codec->DecodeFrame(utv->buffer, avpkt->data, true);

     /* Set the output data depending on the colorspace */
     switch (avctx->pix_fmt) {
     case AV_PIX_FMT_YUV420P:
         pic->linesize[0] = w;
         pic->linesize[1] = pic->linesize[2] = w / 2;
         pic->data[0] = utv->buffer;
         pic->data[2] = utv->buffer + (w * h);
         pic->data[1] = pic->data[2] + (w * h / 4);
         break;
     case AV_PIX_FMT_YUYV422:
         pic->linesize[0] = w * 2;
         pic->data[0] = utv->buffer;
         break;
     case AV_PIX_FMT_YUV422P10: {
         uint16_t *y, *u, *v;
         int i,j;
         int linesize = ((w + 47) / 48) * 128;

         pic->linesize[0] = w * 2;
         pic->linesize[1] =
         pic->linesize[2] = w;
         pic->data[0] = utv->buffer + linesize * h;
         pic->data[1] = pic->data[0] + h*pic->linesize[0];
         pic->data[2] = pic->data[1] + h*pic->linesize[1];
         y = (uint16_t*)pic->data[0];
         u = (uint16_t*)pic->data[1];
         v = (uint16_t*)pic->data[2];
         for (j = 0; j < h; j++) {
             const uint8_t *in = utv->buffer + j * linesize;

             for (i = 0; i + 1 < w; i += 6, in += 4) {
                 unsigned a,b;
                 a = AV_RL32(in);
                 in += 4;
                 b = AV_RL32(in);
                 *u++ = (a    ) & 0x3FF;
                 *y++ = (a>>10) & 0x3FF;
                 *v++ = (a>>20) & 0x3FF;
                 *y++ = (b    ) & 0x3FF;

                 if (i + 3 >= w)
                     break;

                 in += 4;
                 a = AV_RL32(in);
                 *u++ = (b>>10) & 0x3FF;
                 *y++ = (b>>20) & 0x3FF;
                 *v++ = (a    ) & 0x3FF;
                 *y++ = (a>>10) & 0x3FF;

                 if (i + 5 >= w)
                     break;

                 in += 4;
                 b = AV_RL32(in);
                 *u++ = (a>>20) & 0x3FF;
                 *y++ = (b    ) & 0x3FF;
                 *v++ = (b>>10) & 0x3FF;
                 *y++ = (b>>20) & 0x3FF;
             }
         }
         break;
     }
     case AV_PIX_FMT_BGR24:
     case AV_PIX_FMT_RGB32:
         /* Make the linesize negative, since Ut Video uses bottom-up BGR */
         pic->linesize[0] = -1 * w * (avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4);
         pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0];
         break;
     }

     *got_frame = 1;
     av_frame_move_ref((AVFrame*)data, pic);

     return avpkt->size;
 }

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

     /* Free output */
     av_frame_free(&avctx->coded_frame);
     av_freep(&utv->buffer);

     /* Finish decoding and clean up the instance */
     utv->codec->DecodeEnd();
     CCodec::DeleteInstance(utv->codec);

     return 0;
 }

 AVCodec ff_libutvideo_decoder = {
     "libutvideo",
     NULL_IF_CONFIG_SMALL("Ut Video"),
     AVMEDIA_TYPE_VIDEO,
     AV_CODEC_ID_UTVIDEO,
     0,    //capabilities
     NULL, //supported_framerates
     NULL, //pix_fmts
     NULL, //supported_samplerates
     NULL, //sample_fmts
     NULL, //channel_layouts
     0,    //max_lowres
     NULL, //priv_class
     NULL, //profiles
     sizeof(UtVideoContext),
     NULL, //next
     NULL, //init_thread_copy
     NULL, //update_thread_context
     NULL, //defaults
     NULL, //init_static_data
     utvideo_decode_init,
     NULL, //encode
     NULL, //encode2
     utvideo_decode_frame,
     utvideo_decode_close,
 };
	/*
	* Copyright (c) 2011 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 "avcodec.h"
	#include "libavutil/imgutils.h"
	}

	#include "libutvideo.h"
	#include "get_bits.h"

	static av_cold int utvideo_decode_init(AVCodecContext *avctx)
	{
	UtVideoContext utv = (UtVideoContext )avctx->priv_data;
	UtVideoExtra info;
	int format;
	int begin_ret;

	if (avctx->extradata_size != 16 && avctx->extradata_size != 8 ) {
	av_log(avctx, AV_LOG_ERROR, "Extradata size (%d) mismatch.\n", avctx->extradata_size);
	return -1;
	}

	/* Read extradata */
	info.version = AV_RL32(avctx->extradata);
	info.original_format = AV_RL32(avctx->extradata + 4);
	info.frameinfo_size = AV_RL32(avctx->extradata + 8);
	info.flags = AV_RL32(avctx->extradata + 12);

	/* Pick format based on FOURCC */
	switch (avctx->codec_tag) {
	#ifdef UTV_BT709
	case MKTAG('U', 'L', 'H', '0'):
	avctx->pix_fmt = AV_PIX_FMT_YUV420P;
	avctx->colorspace = AVCOL_SPC_BT709;
	format = UTVF_YV12;
	break;
	case MKTAG('U', 'L', 'H', '2'):
	avctx->pix_fmt = AV_PIX_FMT_YUYV422;
	avctx->colorspace = AVCOL_SPC_BT709;
	format = UTVF_YUY2;
	break;
	#endif
	case MKTAG('U', 'L', 'Y', '0'):
	avctx->pix_fmt = AV_PIX_FMT_YUV420P;
	format = UTVF_YV12;
	break;
	case MKTAG('U', 'L', 'Y', '2'):
	avctx->pix_fmt = AV_PIX_FMT_YUYV422;
	format = UTVF_YUY2;
	break;
	case MKTAG('U', 'L', 'R', 'G'):
	avctx->pix_fmt = AV_PIX_FMT_BGR24;
	format = UTVF_NFCC_BGR_BU;
	break;
	case MKTAG('U', 'L', 'R', 'A'):
	avctx->pix_fmt = AV_PIX_FMT_RGB32;
	format = UTVF_NFCC_BGRA_BU;
	break;
	#ifdef UTVF_UQY2
	case MKTAG('U', 'Q', 'Y', '2'):
	avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
	format = UTVF_v210;
	break;
	#endif
	default:
	av_log(avctx, AV_LOG_ERROR,
	"Not a Ut Video FOURCC: %X\n", avctx->codec_tag);
	return -1;
	}

	/* Only allocate the buffer once */
	utv->buf_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
	#ifdef UTVF_UQY2
	if (format == UTVF_v210)
	utv->buf_size += avctx->height * ((avctx->width + 47) / 48) * 128; // the linesize used by the decoder, this does not seem to be exported
	#endif
	utv->buffer = (uint8_t )av_malloc(utv->buf_size sizeof(uint8_t));

	if (utv->buffer == NULL) {
	av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n");
	return -1;
	}

	/* Allocate the output frame */
	avctx->coded_frame = av_frame_alloc();

	/* Ut Video only supports 8-bit */
	avctx->bits_per_raw_sample = 8;

	/* Is it interlaced? */
	avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0;

	/* Apparently Ut Video doesn't store this info... */
	avctx->coded_frame->top_field_first = 1;

	/*
	* 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 Decoding */
	begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height,
	CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra));

	/* Check to see if the decoder initlized properly */
	if (begin_ret != 0) {
	av_log(avctx, AV_LOG_ERROR,
	"Could not initialize decoder: %d\n", begin_ret);
	return -1;
	}

	return 0;
	}

	static int utvideo_decode_frame(AVCodecContext avctx, void data,
	int got_frame, AVPacket avpkt)
	{
	UtVideoContext utv = (UtVideoContext )avctx->priv_data;
	AVFrame *pic = avctx->coded_frame;
	int w = avctx->width, h = avctx->height;

	/* Set flags */
	pic->pict_type = AV_PICTURE_TYPE_I;
	pic->key_frame = 1;

	/* Decode the frame */
	utv->codec->DecodeFrame(utv->buffer, avpkt->data, true);

	/* Set the output data depending on the colorspace */
	switch (avctx->pix_fmt) {
	case AV_PIX_FMT_YUV420P:
	pic->linesize[0] = w;
	pic->linesize[1] = pic->linesize[2] = w / 2;
	pic->data[0] = utv->buffer;
	pic->data[2] = utv->buffer + (w * h);
	pic->data[1] = pic->data[2] + (w * h / 4);
	break;
	case AV_PIX_FMT_YUYV422:
	pic->linesize[0] = w * 2;
	pic->data[0] = utv->buffer;
	break;
	case AV_PIX_FMT_YUV422P10: {
	uint16_t y, u, *v;
	int i,j;
	int linesize = ((w + 47) / 48) * 128;

	pic->linesize[0] = w * 2;
	pic->linesize[1] =
	pic->linesize[2] = w;
	pic->data[0] = utv->buffer + linesize * h;
	pic->data[1] = pic->data[0] + h*pic->linesize[0];
	pic->data[2] = pic->data[1] + h*pic->linesize[1];
	y = (uint16_t*)pic->data[0];
	u = (uint16_t*)pic->data[1];
	v = (uint16_t*)pic->data[2];
	for (j = 0; j < h; j++) {
	const uint8_t in = utv->buffer + j linesize;

	for (i = 0; i + 1 < w; i += 6, in += 4) {
	unsigned a,b;
	a = AV_RL32(in);
	in += 4;
	b = AV_RL32(in);
	*u++ = (a ) & 0x3FF;
	*y++ = (a>>10) & 0x3FF;
	*v++ = (a>>20) & 0x3FF;
	*y++ = (b ) & 0x3FF;

	if (i + 3 >= w)
	break;

	in += 4;
	a = AV_RL32(in);
	*u++ = (b>>10) & 0x3FF;
	*y++ = (b>>20) & 0x3FF;
	*v++ = (a ) & 0x3FF;
	*y++ = (a>>10) & 0x3FF;

	if (i + 5 >= w)
	break;

	in += 4;
	b = AV_RL32(in);
	*u++ = (a>>20) & 0x3FF;
	*y++ = (b ) & 0x3FF;
	*v++ = (b>>10) & 0x3FF;
	*y++ = (b>>20) & 0x3FF;
	}
	}
	break;
	}
	case AV_PIX_FMT_BGR24:
	case AV_PIX_FMT_RGB32:
	/* Make the linesize negative, since Ut Video uses bottom-up BGR */
	pic->linesize[0] = -1 * w * (avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4);
	pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0];
	break;
	}

	*got_frame = 1;
	av_frame_move_ref((AVFrame*)data, pic);

	return avpkt->size;
	}

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

	/* Free output */
	av_frame_free(&avctx->coded_frame);
	av_freep(&utv->buffer);

	/* Finish decoding and clean up the instance */
	utv->codec->DecodeEnd();
	CCodec::DeleteInstance(utv->codec);

	return 0;
	}

	AVCodec ff_libutvideo_decoder = {
	"libutvideo",
	NULL_IF_CONFIG_SMALL("Ut Video"),
	AVMEDIA_TYPE_VIDEO,
	AV_CODEC_ID_UTVIDEO,
	0, //capabilities
	NULL, //supported_framerates
	NULL, //pix_fmts
	NULL, //supported_samplerates
	NULL, //sample_fmts
	NULL, //channel_layouts
	0, //max_lowres
	NULL, //priv_class
	NULL, //profiles
	sizeof(UtVideoContext),
	NULL, //next
	NULL, //init_thread_copy
	NULL, //update_thread_context
	NULL, //defaults
	NULL, //init_static_data
	utvideo_decode_init,
	NULL, //encode
	NULL, //encode2
	utvideo_decode_frame,
	utvideo_decode_close,
	};