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libavcodec/v308enc.c

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00001 /*
00002  * v308 encoder
00003  *
00004  * Copyright (c) 2011 Carl Eugen Hoyos
00005  *
00006  * This file is part of FFmpeg.
00007  *
00008  * FFmpeg is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU Lesser General Public
00010  * License as published by the Free Software Foundation; either
00011  * version 2.1 of the License, or (at your option) any later version.
00012  *
00013  * FFmpeg is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * Lesser General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU Lesser General Public
00019  * License along with FFmpeg; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  */
00022 
00023 #include "libavutil/intreadwrite.h"
00024 #include "avcodec.h"
00025 
00026 static av_cold int v308_encode_init(AVCodecContext *avctx)
00027 {
00028     if (avctx->width & 1) {
00029         av_log(avctx, AV_LOG_ERROR, "v308 requires width to be even.\n");
00030         return AVERROR_INVALIDDATA;
00031     }
00032 
00033     avctx->coded_frame = avcodec_alloc_frame();
00034 
00035     if (!avctx->coded_frame) {
00036         av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
00037         return AVERROR(ENOMEM);
00038     }
00039 
00040     return 0;
00041 }
00042 
00043 static int v308_encode_frame(AVCodecContext *avctx, uint8_t *buf,
00044                              int buf_size, void *data)
00045 {
00046     AVFrame *pic = data;
00047     uint8_t *dst = buf;
00048     uint8_t *y, *u, *v;
00049     int i, j;
00050     int output_size = 0;
00051 
00052     if (buf_size < avctx->width * avctx->height * 3) {
00053         av_log(avctx, AV_LOG_ERROR, "Out buffer is too small.\n");
00054         return AVERROR(ENOMEM);
00055     }
00056 
00057     avctx->coded_frame->reference = 0;
00058     avctx->coded_frame->key_frame = 1;
00059     avctx->coded_frame->pict_type = AV_PICTURE_TYPE_I;
00060 
00061     y = pic->data[0];
00062     u = pic->data[1];
00063     v = pic->data[2];
00064 
00065     for (i = 0; i < avctx->height; i++) {
00066         for (j = 0; j < avctx->width; j++) {
00067             *dst++ = v[j];
00068             *dst++ = y[j];
00069             *dst++ = u[j];
00070             output_size += 3;
00071         }
00072         y += pic->linesize[0];
00073         u += pic->linesize[1];
00074         v += pic->linesize[2];
00075     }
00076 
00077     return output_size;
00078 }
00079 
00080 static av_cold int v308_encode_close(AVCodecContext *avctx)
00081 {
00082     av_freep(&avctx->coded_frame);
00083 
00084     return 0;
00085 }
00086 
00087 AVCodec ff_v308_encoder = {
00088     .name         = "v308",
00089     .type         = AVMEDIA_TYPE_VIDEO,
00090     .id           = CODEC_ID_V308,
00091     .init         = v308_encode_init,
00092     .encode       = v308_encode_frame,
00093     .close        = v308_encode_close,
00094     .pix_fmts     = (const enum PixelFormat[]){ PIX_FMT_YUV444P, PIX_FMT_NONE },
00095     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed packed 4:4:4"),
00096 };
Generated on Fri Feb 1 2013 14:34:45 for FFmpeg by doxygen 1.7.1