mirror of https://github.com/FFmpeg/FFmpeg.git
Add a wrapper for libutvideo's decoder.
This supports decoding the following FOURCCs:
ULY0 - 4:2:0 YCbCr
ULY2 - 4:2:2 YCbCr
ULRG - RGB
ULRA - RGBA
Also, bump version.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
pull/2/head
Derek Buitenhuis
13 years ago
committed by
Michael Niedermayer
parent
fe87b2e79c
commit
1de357d6da
7 changed files with 244 additions and 2 deletions
@ -0,0 +1,230 @@ |
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/*
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* Copyright (c) 2011 Derek Buitenhuis |
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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 General Public |
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* License as published by the Free Software Foundation; |
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* version 2 of the License. |
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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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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU 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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/**
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* @file |
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* Known FOURCCs: |
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* 'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA) |
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*/ |
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extern "C" { |
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#include "avcodec.h" |
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} |
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#include <stdlib.h> |
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#include <utvideo/utvideo.h> |
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#include <utvideo/Codec.h> |
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#include "get_bits.h" |
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typedef struct { |
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uint32_t version; |
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uint32_t original_format; |
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uint32_t stripes; |
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uint32_t flags; |
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} UtVideoExtra; |
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typedef struct { |
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CCodec *codec; |
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unsigned int buf_size; |
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uint8_t *output; |
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} UtVideoContext; |
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static av_cold int utvideo_decode_init(AVCodecContext *avctx) |
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{ |
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UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
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UtVideoExtra info; |
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int defined_fourcc = 0; |
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if(avctx->extradata_size != 4*4) |
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{ |
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av_log(avctx, AV_LOG_ERROR, "Extradata size mismatch.\n"); |
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return -1; |
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} |
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/* Read extradata */ |
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info.version = AV_RL32(avctx->extradata); |
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info.original_format = AV_RL32(avctx->extradata + 4); |
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info.stripes = AV_RL32(avctx->extradata + 8); |
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info.flags = AV_RL32(avctx->extradata + 12); |
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/* Try to output the original format */ |
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switch(UNFCC(info.original_format)) |
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{ |
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case UTVF_YV12: |
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avctx->pix_fmt = PIX_FMT_YUV420P; |
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break; |
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case UTVF_YUY2: |
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case UTVF_YUYV: |
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case UTVF_YUNV: |
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avctx->pix_fmt = PIX_FMT_YUYV422; |
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break; |
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case UTVF_UYVY: |
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case UTVF_UYNV: |
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avctx->pix_fmt = PIX_FMT_UYVY422; |
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break; |
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case UTVF_RGB24_WIN: |
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avctx->pix_fmt = PIX_FMT_BGR24; |
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break; |
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case UTVF_RGB32_WIN: |
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avctx->pix_fmt = PIX_FMT_RGB32; |
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break; |
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case UTVF_ARGB32_WIN: |
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avctx->pix_fmt = PIX_FMT_ARGB; |
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break; |
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case 0: |
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/* Fall back on FOURCC */ |
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switch(UNFCC(avctx->codec_tag)) |
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{ |
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case UTVF_ULY0: |
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avctx->pix_fmt = PIX_FMT_YUV420P; |
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defined_fourcc = UTVF_YV12; |
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break; |
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case UTVF_ULY2: |
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avctx->pix_fmt = PIX_FMT_YUYV422; |
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defined_fourcc = UTVF_YUY2; |
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break; |
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case UTVF_ULRG: |
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avctx->pix_fmt = PIX_FMT_BGR24; |
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defined_fourcc = UTVF_RGB24_WIN; |
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break; |
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case UTVF_ULRA: |
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avctx->pix_fmt = PIX_FMT_RGB32; |
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defined_fourcc = UTVF_RGB32_WIN; |
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break; |
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} |
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break; |
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default: |
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av_log(avctx, AV_LOG_ERROR, |
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"Codec ExtraData is Corrupt or Invalid: %X\n", info.original_format); |
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return -1; |
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} |
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/* Only allocate the buffer once */ |
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utv->buf_size = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height); |
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utv->output = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t)); |
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if(utv->output == NULL) |
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{ |
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av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n"); |
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return -1; |
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} |
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/* Allocate the output frame */ |
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avctx->coded_frame = avcodec_alloc_frame(); |
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/* Ut Video only supports 8-bit */ |
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avctx->bits_per_raw_sample = 8; |
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/* Is it interlaced? */ |
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avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0; |
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/* Apparently Ut Video doesn't store this info... */ |
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avctx->coded_frame->top_field_first = 1; |
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/*
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* Create a Ut Video instance. Since the function wants |
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* an "interface name" string, pass it the name of the lib. |
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*/ |
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utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec"); |
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/* Initialize Decoding */ |
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utv->codec->DecodeBegin(defined_fourcc ? defined_fourcc : UNFCC(info.original_format), |
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avctx->width, avctx->height, CBGROSSWIDTH_WINDOWS, &info, |
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sizeof(UtVideoExtra)); |
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return 0; |
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} |
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static int utvideo_decode_frame(AVCodecContext *avctx, void *data, |
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int *data_size, AVPacket *avpkt) |
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{ |
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UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
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AVFrame *pic = avctx->coded_frame; |
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unsigned int w = avctx->width, h = avctx->height; |
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/* Set flags */ |
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pic->reference = 0; |
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pic->pict_type = AV_PICTURE_TYPE_I; |
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pic->key_frame = 1; |
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/* Decode the frame */ |
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utv->codec->DecodeFrame(utv->output, avpkt->data, true); |
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/* Set the output data depending on the colorspace */ |
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switch(avctx->pix_fmt) |
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{ |
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case PIX_FMT_YUV420P: |
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pic->linesize[0] = w; |
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pic->linesize[1] = pic->linesize[2] = w / 2; |
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pic->data[0] = utv->output; |
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pic->data[2] = utv->output + (w * h); |
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pic->data[1] = pic->data[2] + (w * h / 4); |
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break; |
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case PIX_FMT_YUYV422: |
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case PIX_FMT_UYVY422: |
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pic->linesize[0] = w * 2; |
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pic->data[0] = utv->output; |
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break; |
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case PIX_FMT_BGR24: |
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case PIX_FMT_RGB32: |
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/* Make the linesize negative, since Ut Video uses bottom-up BGR */ |
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pic->linesize[0] = -1 * w * (avctx->pix_fmt == PIX_FMT_BGR24 ? 3 : 4); |
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pic->data[0] = utv->output + utv->buf_size + pic->linesize[0]; |
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break; |
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} |
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*data_size = sizeof(AVFrame); |
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*(AVFrame *)data = *pic; |
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return avpkt->size; |
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} |
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static av_cold int utvideo_decode_close(AVCodecContext *avctx) |
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{ |
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UtVideoContext *utv = (UtVideoContext *)avctx->priv_data; |
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/* Free output */ |
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av_freep(&avctx->coded_frame); |
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av_freep(&utv->output); |
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/* Finish decoding and clean up the instance */ |
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utv->codec->DecodeEnd(); |
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CCodec::DeleteInstance(utv->codec); |
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return 0; |
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} |
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AVCodec ff_libutvideo_decoder = { |
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"utvideo", |
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AVMEDIA_TYPE_VIDEO, |
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CODEC_ID_UTVIDEO, |
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sizeof(UtVideoContext), |
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utvideo_decode_init, |
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NULL, |
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utvideo_decode_close, |
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utvideo_decode_frame, |
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CODEC_CAP_LOSSLESS, |
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NULL, |
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NULL, |
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NULL, |
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NULL, |
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NULL_IF_CONFIG_SMALL("Ut Video"), |
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}; |
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