mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
110 lines
3.3 KiB
C
110 lines
3.3 KiB
C
/*
|
|
* Pinnacle TARGA CineWave YUV16 decoder
|
|
* Copyright (c) 2012 Carl Eugen Hoyos
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser 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
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "internal.h"
|
|
|
|
static av_cold int y216_decode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV422P16;
|
|
avctx->bits_per_raw_sample = 14;
|
|
|
|
avctx->coded_frame = avcodec_alloc_frame();
|
|
|
|
if (!avctx->coded_frame) {
|
|
av_log(avctx, AV_LOG_ERROR, "Could not allocate frame.\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int y216_decode_frame(AVCodecContext *avctx, void *data,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
AVFrame *pic = avctx->coded_frame;
|
|
const uint16_t *src = (uint16_t *)avpkt->data;
|
|
uint16_t *y, *u, *v, aligned_width = FFALIGN(avctx->width, 4);
|
|
int i, j;
|
|
|
|
if (pic->data[0])
|
|
avctx->release_buffer(avctx, pic);
|
|
|
|
if (avpkt->size < 4 * avctx->height * aligned_width) {
|
|
av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
pic->reference = 0;
|
|
|
|
if (ff_get_buffer(avctx, pic) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "Could not allocate buffer.\n");
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
pic->key_frame = 1;
|
|
pic->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
y = (uint16_t *)pic->data[0];
|
|
u = (uint16_t *)pic->data[1];
|
|
v = (uint16_t *)pic->data[2];
|
|
|
|
for (i = 0; i < avctx->height; i++) {
|
|
for (j = 0; j < avctx->width >> 1; j++) {
|
|
u[ j ] = src[4 * j ] << 2 | src[4 * j ] >> 14;
|
|
y[2 * j ] = src[4 * j + 1] << 2 | src[4 * j + 1] >> 14;
|
|
v[ j ] = src[4 * j + 2] << 2 | src[4 * j + 2] >> 14;
|
|
y[2 * j + 1] = src[4 * j + 3] << 2 | src[4 * j + 3] >> 14;
|
|
}
|
|
|
|
y += pic->linesize[0] >> 1;
|
|
u += pic->linesize[1] >> 1;
|
|
v += pic->linesize[2] >> 1;
|
|
src += aligned_width << 1;
|
|
}
|
|
|
|
*got_frame = 1;
|
|
*(AVFrame *)data = *pic;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
static av_cold int y216_decode_close(AVCodecContext *avctx)
|
|
{
|
|
if (avctx->coded_frame->data[0])
|
|
avctx->release_buffer(avctx, avctx->coded_frame);
|
|
|
|
av_freep(&avctx->coded_frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_targa_y216_decoder = {
|
|
.name = "targa_y216",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = AV_CODEC_ID_TARGA_Y216,
|
|
.init = y216_decode_init,
|
|
.decode = y216_decode_frame,
|
|
.close = y216_decode_close,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Pinnacle TARGA CineWave YUV16"),
|
|
};
|