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4243da4ff4
This is possible, because every given FFCodec has to implement exactly one of these. Doing so decreases sizeof(FFCodec) and therefore decreases the size of the binary. Notice that in case of position-independent code the decrease is in .data.rel.ro, so that this translates to decreased memory consumption. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
128 lines
3.8 KiB
C
128 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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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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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->key_frame = 1;
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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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.p.long_name = NULL_IF_CONFIG_SMALL("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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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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