mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-29 10:52:20 +00:00
127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
|
|
* v410 decoder
|
|
*
|
|
* Copyright (c) 2011 Derek Buitenhuis
|
|
*
|
|
* 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 "libavutil/common.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "avcodec.h"
|
|
#include "codec_internal.h"
|
|
#include "thread.h"
|
|
|
|
typedef struct ThreadData {
|
|
AVFrame *frame;
|
|
const uint8_t *buf;
|
|
int stride;
|
|
} ThreadData;
|
|
|
|
static av_cold int v410_decode_init(AVCodecContext *avctx)
|
|
{
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
|
|
avctx->bits_per_raw_sample = 10;
|
|
|
|
if (avctx->width & 1) {
|
|
if (avctx->err_recognition & AV_EF_EXPLODE) {
|
|
av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
|
|
return AVERROR_INVALIDDATA;
|
|
} else {
|
|
av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
|
|
{
|
|
ThreadData *td = arg;
|
|
AVFrame *pic = td->frame;
|
|
int stride = td->stride;
|
|
int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
|
|
int slice_start = (avctx->height * jobnr) / thread_count;
|
|
int slice_end = (avctx->height * (jobnr+1)) / thread_count;
|
|
const uint8_t *src = td->buf + stride * slice_start;
|
|
uint16_t *y, *u, *v;
|
|
uint32_t val;
|
|
int i, j;
|
|
|
|
y = (uint16_t*)pic->data[0] + slice_start * (pic->linesize[0] >> 1);
|
|
u = (uint16_t*)pic->data[1] + slice_start * (pic->linesize[1] >> 1);
|
|
v = (uint16_t*)pic->data[2] + slice_start * (pic->linesize[2] >> 1);
|
|
|
|
for (i = slice_start; i < slice_end; i++) {
|
|
for (j = 0; j < avctx->width; j++) {
|
|
val = AV_RL32(src);
|
|
|
|
u[j] = (val >> 2) & 0x3FF;
|
|
y[j] = (val >> 12) & 0x3FF;
|
|
v[j] = (val >> 22);
|
|
|
|
src += 4;
|
|
}
|
|
|
|
y += pic->linesize[0] >> 1;
|
|
u += pic->linesize[1] >> 1;
|
|
v += pic->linesize[2] >> 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int v410_decode_frame(AVCodecContext *avctx, AVFrame *pic,
|
|
int *got_frame, AVPacket *avpkt)
|
|
{
|
|
ThreadData td;
|
|
const uint8_t *src = avpkt->data;
|
|
int ret;
|
|
int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
|
|
|
|
td.stride = avctx->width * 4;
|
|
if (avpkt->size < 4 * avctx->height * avctx->width) {
|
|
av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
|
|
return ret;
|
|
|
|
pic->flags |= AV_FRAME_FLAG_KEY;
|
|
pic->pict_type = AV_PICTURE_TYPE_I;
|
|
|
|
td.buf = src;
|
|
td.frame = pic;
|
|
avctx->execute2(avctx, v410_decode_slice, &td, NULL, thread_count);
|
|
|
|
*got_frame = 1;
|
|
|
|
return avpkt->size;
|
|
}
|
|
|
|
const FFCodec ff_v410_decoder = {
|
|
.p.name = "v410",
|
|
CODEC_LONG_NAME("Uncompressed 4:4:4 10-bit"),
|
|
.p.type = AVMEDIA_TYPE_VIDEO,
|
|
.p.id = AV_CODEC_ID_V410,
|
|
.init = v410_decode_init,
|
|
FF_CODEC_DECODE_CB(v410_decode_frame),
|
|
.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
|
|
AV_CODEC_CAP_FRAME_THREADS,
|
|
};
|