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FFmpeg/libavcodec/r210dec.c
Andreas Rheinhardt a247ac640d avcodec: Constify AVCodecs
Given that the AVCodec.next pointer has now been removed, most of the
AVCodecs are not modified at all any more and can therefore be made
const (as this patch does); the only exceptions are the very few codecs
for external libraries that have a init_static_data callback.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
2021-04-27 10:43:15 -03:00

140 lines
4.5 KiB
C

/*
* R210 decoder
*
* Copyright (c) 2009 Reimar Doeffinger <Reimar.Doeffinger@gmx.de>
*
* 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"
#include "libavutil/bswap.h"
#include "libavutil/common.h"
static av_cold int decode_init(AVCodecContext *avctx)
{
avctx->pix_fmt = AV_PIX_FMT_GBRP10;
avctx->bits_per_raw_sample = 10;
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
AVPacket *avpkt)
{
int h, w, ret;
AVFrame *pic = data;
const uint32_t *src = (const uint32_t *)avpkt->data;
int aligned_width = FFALIGN(avctx->width,
avctx->codec_id == AV_CODEC_ID_R10K ? 1 : 64);
uint8_t *g_line, *b_line, *r_line;
int r10 = (avctx->codec_tag & 0xFFFFFF) == MKTAG('r', '1', '0', 0);
int le = avctx->codec_tag == MKTAG('R', '1', '0', 'k') &&
avctx->extradata_size >= 12 && !memcmp(&avctx->extradata[4], "DpxE", 4) &&
!avctx->extradata[11];
if (avpkt->size < 4 * aligned_width * avctx->height) {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return AVERROR_INVALIDDATA;
}
if ((ret = ff_get_buffer(avctx, pic, 0)) < 0)
return ret;
pic->pict_type = AV_PICTURE_TYPE_I;
pic->key_frame = 1;
g_line = pic->data[0];
b_line = pic->data[1];
r_line = pic->data[2];
for (h = 0; h < avctx->height; h++) {
uint16_t *dstg = (uint16_t *)g_line;
uint16_t *dstb = (uint16_t *)b_line;
uint16_t *dstr = (uint16_t *)r_line;
for (w = 0; w < avctx->width; w++) {
uint32_t pixel;
uint16_t r, g, b;
if (avctx->codec_id == AV_CODEC_ID_AVRP || r10 || le) {
pixel = av_le2ne32(*src++);
} else {
pixel = av_be2ne32(*src++);
}
if (avctx->codec_id == AV_CODEC_ID_R210) {
b = pixel & 0x3ff;
g = (pixel >> 10) & 0x3ff;
r = (pixel >> 20) & 0x3ff;
} else if (r10) {
r = pixel & 0x3ff;
g = (pixel >> 10) & 0x3ff;
b = (pixel >> 20) & 0x3ff;
} else {
b = (pixel >> 2) & 0x3ff;
g = (pixel >> 12) & 0x3ff;
r = (pixel >> 22) & 0x3ff;
}
*dstr++ = r;
*dstg++ = g;
*dstb++ = b;
}
src += aligned_width - avctx->width;
g_line += pic->linesize[0];
b_line += pic->linesize[1];
r_line += pic->linesize[2];
}
*got_frame = 1;
return avpkt->size;
}
#if CONFIG_R210_DECODER
const AVCodec ff_r210_decoder = {
.name = "r210",
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed RGB 10-bit"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_R210,
.init = decode_init,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
#if CONFIG_R10K_DECODER
const AVCodec ff_r10k_decoder = {
.name = "r10k",
.long_name = NULL_IF_CONFIG_SMALL("AJA Kona 10-bit RGB Codec"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_R10K,
.init = decode_init,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif
#if CONFIG_AVRP_DECODER
const AVCodec ff_avrp_decoder = {
.name = "avrp",
.long_name = NULL_IF_CONFIG_SMALL("Avid 1:1 10-bit RGB Packer"),
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_AVRP,
.init = decode_init,
.decode = decode_frame,
.capabilities = AV_CODEC_CAP_DR1,
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
#endif