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272 lines
8.1 KiB
272 lines
8.1 KiB
/* |
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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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* 'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709) |
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*/ |
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extern "C" { |
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#include "avcodec.h" |
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#include "libavutil/imgutils.h" |
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} |
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#include "libutvideo.h" |
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#include "get_bits.h" |
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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 format; |
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int begin_ret; |
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if (avctx->extradata_size != 16 && avctx->extradata_size != 8 ) { |
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av_log(avctx, AV_LOG_ERROR, "Extradata size (%d) mismatch.\n", avctx->extradata_size); |
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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.frameinfo_size = AV_RL32(avctx->extradata + 8); |
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info.flags = AV_RL32(avctx->extradata + 12); |
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/* Pick format based on FOURCC */ |
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switch (avctx->codec_tag) { |
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#ifdef UTV_BT709 |
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case MKTAG('U', 'L', 'H', '0'): |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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avctx->colorspace = AVCOL_SPC_BT709; |
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format = UTVF_YV12; |
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break; |
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case MKTAG('U', 'L', 'H', '2'): |
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avctx->pix_fmt = AV_PIX_FMT_YUYV422; |
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avctx->colorspace = AVCOL_SPC_BT709; |
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format = UTVF_YUY2; |
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break; |
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#endif |
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case MKTAG('U', 'L', 'Y', '0'): |
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avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
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format = UTVF_YV12; |
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break; |
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case MKTAG('U', 'L', 'Y', '2'): |
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avctx->pix_fmt = AV_PIX_FMT_YUYV422; |
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format = UTVF_YUY2; |
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break; |
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case MKTAG('U', 'L', 'R', 'G'): |
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avctx->pix_fmt = AV_PIX_FMT_BGR24; |
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format = UTVF_NFCC_BGR_BU; |
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break; |
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case MKTAG('U', 'L', 'R', 'A'): |
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avctx->pix_fmt = AV_PIX_FMT_RGB32; |
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format = UTVF_NFCC_BGRA_BU; |
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break; |
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#ifdef UTVF_UQY2 |
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case MKTAG('U', 'Q', 'Y', '2'): |
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avctx->pix_fmt = AV_PIX_FMT_YUV422P10; |
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format = UTVF_v210; |
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break; |
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#endif |
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default: |
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av_log(avctx, AV_LOG_ERROR, |
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"Not a Ut Video FOURCC: %X\n", avctx->codec_tag); |
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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 = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1); |
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#ifdef UTVF_UQY2 |
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if (format == UTVF_v210) |
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utv->buf_size += avctx->height * ((avctx->width + 47) / 48) * 128; // the linesize used by the decoder, this does not seem to be exported |
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#endif |
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utv->buffer = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t)); |
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if (utv->buffer == NULL) { |
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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 = av_frame_alloc(); |
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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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begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height, |
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CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra)); |
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/* Check to see if the decoder initlized properly */ |
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if (begin_ret != 0) { |
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av_log(avctx, AV_LOG_ERROR, |
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"Could not initialize decoder: %d\n", begin_ret); |
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return -1; |
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} |
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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 *got_frame, 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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int w = avctx->width, h = avctx->height; |
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/* Set flags */ |
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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->buffer, 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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case AV_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->buffer; |
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pic->data[2] = utv->buffer + (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 AV_PIX_FMT_YUYV422: |
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pic->linesize[0] = w * 2; |
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pic->data[0] = utv->buffer; |
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break; |
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case AV_PIX_FMT_YUV422P10: { |
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uint16_t *y, *u, *v; |
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int i,j; |
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int linesize = ((w + 47) / 48) * 128; |
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pic->linesize[0] = w * 2; |
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pic->linesize[1] = |
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pic->linesize[2] = w; |
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pic->data[0] = utv->buffer + linesize * h; |
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pic->data[1] = pic->data[0] + h*pic->linesize[0]; |
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pic->data[2] = pic->data[1] + h*pic->linesize[1]; |
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y = (uint16_t*)pic->data[0]; |
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u = (uint16_t*)pic->data[1]; |
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v = (uint16_t*)pic->data[2]; |
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for (j = 0; j < h; j++) { |
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const uint8_t *in = utv->buffer + j * linesize; |
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for (i = 0; i + 1 < w; i += 6, in += 4) { |
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unsigned a,b; |
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a = AV_RL32(in); |
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in += 4; |
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b = AV_RL32(in); |
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*u++ = (a ) & 0x3FF; |
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*y++ = (a>>10) & 0x3FF; |
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*v++ = (a>>20) & 0x3FF; |
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*y++ = (b ) & 0x3FF; |
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if (i + 3 >= w) |
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break; |
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in += 4; |
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a = AV_RL32(in); |
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*u++ = (b>>10) & 0x3FF; |
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*y++ = (b>>20) & 0x3FF; |
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*v++ = (a ) & 0x3FF; |
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*y++ = (a>>10) & 0x3FF; |
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if (i + 5 >= w) |
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break; |
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in += 4; |
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b = AV_RL32(in); |
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*u++ = (a>>20) & 0x3FF; |
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*y++ = (b ) & 0x3FF; |
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*v++ = (b>>10) & 0x3FF; |
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*y++ = (b>>20) & 0x3FF; |
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} |
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} |
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break; |
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} |
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case AV_PIX_FMT_BGR24: |
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case AV_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 == AV_PIX_FMT_BGR24 ? 3 : 4); |
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pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0]; |
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break; |
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} |
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*got_frame = 1; |
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av_frame_move_ref((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_frame_free(&avctx->coded_frame); |
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av_freep(&utv->buffer); |
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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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"libutvideo", |
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NULL_IF_CONFIG_SMALL("Ut Video"), |
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AVMEDIA_TYPE_VIDEO, |
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AV_CODEC_ID_UTVIDEO, |
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0, //capabilities |
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NULL, //supported_framerates |
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NULL, //pix_fmts |
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NULL, //supported_samplerates |
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NULL, //sample_fmts |
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NULL, //channel_layouts |
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0, //max_lowres |
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NULL, //priv_class |
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NULL, //profiles |
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sizeof(UtVideoContext), |
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NULL, //next |
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NULL, //init_thread_copy |
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NULL, //update_thread_context |
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NULL, //defaults |
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NULL, //init_static_data |
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utvideo_decode_init, |
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NULL, //encode |
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NULL, //encode2 |
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utvideo_decode_frame, |
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utvideo_decode_close, |
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};
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