mirror of https://git.ffmpeg.org/ffmpeg.git
247 lines
8.2 KiB
C
247 lines
8.2 KiB
C
/*
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* V210 decoder
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*
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* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
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* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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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 "avcodec.h"
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#include "codec_internal.h"
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#include "v210dec.h"
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#include "v210dec_init.h"
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#include "libavutil/bswap.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/intreadwrite.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 decode_init(AVCodecContext *avctx)
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{
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V210DecContext *s = avctx->priv_data;
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avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
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avctx->bits_per_raw_sample = 10;
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s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
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s->aligned_input = 0;
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ff_v210dec_init(s);
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return 0;
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}
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static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width,
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void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
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{
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uint32_t val;
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int w = (FFMAX(0, width - 12) / 12) * 12;
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unpack_frame(src, y, u, v, w);
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y += w;
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u += w >> 1;
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v += w >> 1;
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src += (w << 1) / 3;
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while (w < width - 5) {
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READ_PIXELS(u, y, v);
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READ_PIXELS(y, u, y);
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READ_PIXELS(v, y, u);
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READ_PIXELS(y, v, y);
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w += 6;
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}
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if (w++ < width) {
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READ_PIXELS(u, y, v);
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if (w++ < width) {
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val = av_le2ne32(*src++);
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*y++ = val & 0x3FF;
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if (w++ < width) {
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*u++ = (val >> 10) & 0x3FF;
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*y++ = (val >> 20) & 0x3FF;
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val = av_le2ne32(*src++);
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*v++ = val & 0x3FF;
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if (w++ < width) {
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*y++ = (val >> 10) & 0x3FF;
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if (w++ < width) {
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*u++ = (val >> 20) & 0x3FF;
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val = av_le2ne32(*src++);
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*y++ = val & 0x3FF;
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*v++ = (val >> 10) & 0x3FF;
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if (w++ < width)
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*y++ = (val >> 20) & 0x3FF;
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}
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}
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}
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}
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}
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}
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static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
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{
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V210DecContext *s = avctx->priv_data;
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ThreadData *td = arg;
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AVFrame *frame = td->frame;
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int stride = td->stride;
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int slice_start = (avctx->height * jobnr) / s->thread_count;
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int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
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uint8_t *psrc = td->buf + stride * slice_start;
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int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
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int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
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int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;
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for (int h = slice_start; h < slice_end; h++) {
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decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
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psrc += stride;
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py += frame->linesize[0] / 2;
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pu += frame->linesize[1] / 2;
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pv += frame->linesize[2] / 2;
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}
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return 0;
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}
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static int v210_stride(int width, int align) {
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int aligned_width = ((width + align - 1) / align) * align;
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return aligned_width * 8 / 3;
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}
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static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
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int *got_frame, AVPacket *avpkt)
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{
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V210DecContext *s = avctx->priv_data;
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ThreadData td;
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int ret, stride, aligned_input;
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const uint8_t *psrc = avpkt->data;
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if (s->custom_stride )
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stride = s->custom_stride > 0 ? s->custom_stride : 0;
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else {
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stride = v210_stride(avctx->width, 48);
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if (avpkt->size < stride * avctx->height) {
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int align;
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for (align = 24; align >= 6; align >>= 1) {
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int small_stride = v210_stride(avctx->width, align);
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if (avpkt->size == small_stride * avctx->height) {
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stride = small_stride;
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if (!s->stride_warning_shown)
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av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
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s->stride_warning_shown = 1;
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break;
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}
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}
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if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
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stride = 0;
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}
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}
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if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
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av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
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return AVERROR_INVALIDDATA;
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}
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if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height ||
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stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
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av_log(avctx, AV_LOG_ERROR, "packet too small\n");
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return AVERROR_INVALIDDATA;
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}
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if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
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&& avpkt->size > 64
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&& AV_RN32(psrc) == AV_RN32("INFO")
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&& avpkt->size - 64 >= stride * avctx->height)
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psrc += 64;
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aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
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if (aligned_input != s->aligned_input) {
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s->aligned_input = aligned_input;
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ff_v210dec_init(s);
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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->pict_type = AV_PICTURE_TYPE_I;
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pic->key_frame = 1;
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if (stride) {
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td.stride = stride;
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td.buf = (uint8_t*)psrc;
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td.frame = pic;
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avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
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} else {
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uint8_t *pointers[4];
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int linesizes[4];
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int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
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if (ret < 0)
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return ret;
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decode_row((const uint32_t *)psrc, (uint16_t *)pointers[0], (uint16_t *)pointers[1], (uint16_t *)pointers[2], avctx->width * avctx->height, s->unpack_frame);
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av_image_copy(pic->data, pic->linesize, (const uint8_t **)pointers, linesizes, avctx->pix_fmt, avctx->width, avctx->height);
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av_freep(&pointers[0]);
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}
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if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
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/* we have interlaced material flagged in container */
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pic->interlaced_frame = 1;
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if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
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pic->top_field_first = 1;
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}
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*got_frame = 1;
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return avpkt->size;
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}
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#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption v210dec_options[] = {
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{"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
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{.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
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{NULL}
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};
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static const AVClass v210dec_class = {
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.class_name = "V210 Decoder",
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.item_name = av_default_item_name,
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.option = v210dec_options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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const FFCodec ff_v210_decoder = {
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.p.name = "v210",
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.p.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
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.p.type = AVMEDIA_TYPE_VIDEO,
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.p.id = AV_CODEC_ID_V210,
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.priv_data_size = sizeof(V210DecContext),
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.init = decode_init,
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FF_CODEC_DECODE_CB(decode_frame),
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.p.capabilities = AV_CODEC_CAP_DR1 |
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AV_CODEC_CAP_SLICE_THREADS |
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AV_CODEC_CAP_FRAME_THREADS,
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.p.priv_class = &v210dec_class,
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};
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