mirror of
https://github.com/FFmpeg/FFmpeg.git
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127 lines
3.8 KiB
C
127 lines
3.8 KiB
C
/*
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* v410 decoder
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*
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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#include "libavutil/common.h"
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#include "libavutil/intreadwrite.h"
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#include "avcodec.h"
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#include "codec_internal.h"
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#include "thread.h"
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typedef struct ThreadData {
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AVFrame *frame;
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const uint8_t *buf;
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int stride;
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} ThreadData;
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static av_cold int v410_decode_init(AVCodecContext *avctx)
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{
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avctx->pix_fmt = AV_PIX_FMT_YUV444P10;
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avctx->bits_per_raw_sample = 10;
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if (avctx->width & 1) {
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if (avctx->err_recognition & AV_EF_EXPLODE) {
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av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
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return AVERROR_INVALIDDATA;
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} else {
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av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
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}
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}
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return 0;
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}
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static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
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{
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ThreadData *td = arg;
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AVFrame *pic = td->frame;
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int stride = td->stride;
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int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
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int slice_start = (avctx->height * jobnr) / thread_count;
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int slice_end = (avctx->height * (jobnr+1)) / thread_count;
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const uint8_t *src = td->buf + stride * slice_start;
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uint16_t *y, *u, *v;
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uint32_t val;
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int i, j;
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y = (uint16_t*)pic->data[0] + slice_start * (pic->linesize[0] >> 1);
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u = (uint16_t*)pic->data[1] + slice_start * (pic->linesize[1] >> 1);
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v = (uint16_t*)pic->data[2] + slice_start * (pic->linesize[2] >> 1);
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for (i = slice_start; i < slice_end; i++) {
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for (j = 0; j < avctx->width; j++) {
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val = AV_RL32(src);
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u[j] = (val >> 2) & 0x3FF;
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y[j] = (val >> 12) & 0x3FF;
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v[j] = (val >> 22);
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src += 4;
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}
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y += pic->linesize[0] >> 1;
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u += pic->linesize[1] >> 1;
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v += pic->linesize[2] >> 1;
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}
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return 0;
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}
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static int v410_decode_frame(AVCodecContext *avctx, AVFrame *pic,
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int *got_frame, AVPacket *avpkt)
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{
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ThreadData td;
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const uint8_t *src = avpkt->data;
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int ret;
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int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
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td.stride = avctx->width * 4;
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if (avpkt->size < 4 * avctx->height * avctx->width) {
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av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
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return AVERROR(EINVAL);
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}
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if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
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return ret;
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pic->flags |= AV_FRAME_FLAG_KEY;
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pic->pict_type = AV_PICTURE_TYPE_I;
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td.buf = src;
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td.frame = pic;
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avctx->execute2(avctx, v410_decode_slice, &td, NULL, thread_count);
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*got_frame = 1;
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return avpkt->size;
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}
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const FFCodec ff_v410_decoder = {
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.p.name = "v410",
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CODEC_LONG_NAME("Uncompressed 4:4:4 10-bit"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_V410,
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.init = v410_decode_init,
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FF_CODEC_DECODE_CB(v410_decode_frame),
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.p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
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AV_CODEC_CAP_FRAME_THREADS,
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};
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