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FFmpeg/libavcodec/v210dec.c
Andreas Rheinhardt 423b6a7e49 avutil/imgutils: Add wrapper for av_image_copy() to avoid casts 
av_image_copy() accepts const uint8_t* const * as source;
lots of user have uint8_t* const * and therefore either
cast (the majority) or copy the array of pointers.

This commit changes this by adding a static inline wrapper
for av_image_copy() that casts between the two types
so that we do not need to add casts everywhere else.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2023-09-12 09:42:27 +02:00

248 lines
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/*
* V210 decoder
*
* Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
*
* 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 "codec_internal.h"
#include "v210dec.h"
#include "v210dec_init.h"
#include "libavutil/bswap.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "thread.h"
typedef struct ThreadData {
AVFrame *frame;
const uint8_t *buf;
int stride;
} ThreadData;
static av_cold int decode_init(AVCodecContext *avctx)
{
V210DecContext *s = avctx->priv_data;
avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
avctx->bits_per_raw_sample = 10;
s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
s->aligned_input = 0;
ff_v210dec_init(s);
return 0;
}
static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width,
void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
{
uint32_t val;
int w = (FFMAX(0, width - 12) / 12) * 12;
unpack_frame(src, y, u, v, w);
y += w;
u += w >> 1;
v += w >> 1;
src += (w << 1) / 3;
while (w < width - 5) {
READ_PIXELS(u, y, v);
READ_PIXELS(y, u, y);
READ_PIXELS(v, y, u);
READ_PIXELS(y, v, y);
w += 6;
}
if (w++ < width) {
READ_PIXELS(u, y, v);
if (w++ < width) {
val = av_le2ne32(*src++);
*y++ = val & 0x3FF;
if (w++ < width) {
*u++ = (val >> 10) & 0x3FF;
*y++ = (val >> 20) & 0x3FF;
val = av_le2ne32(*src++);
*v++ = val & 0x3FF;
if (w++ < width) {
*y++ = (val >> 10) & 0x3FF;
if (w++ < width) {
*u++ = (val >> 20) & 0x3FF;
val = av_le2ne32(*src++);
*y++ = val & 0x3FF;
*v++ = (val >> 10) & 0x3FF;
if (w++ < width)
*y++ = (val >> 20) & 0x3FF;
}
}
}
}
}
}
static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
{
V210DecContext *s = avctx->priv_data;
ThreadData *td = arg;
AVFrame *frame = td->frame;
int stride = td->stride;
int slice_start = (avctx->height * jobnr) / s->thread_count;
int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
const uint8_t *psrc = td->buf + stride * slice_start;
int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;
for (int h = slice_start; h < slice_end; h++) {
decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
psrc += stride;
py += frame->linesize[0] / 2;
pu += frame->linesize[1] / 2;
pv += frame->linesize[2] / 2;
}
return 0;
}
static int v210_stride(int width, int align) {
int aligned_width = ((width + align - 1) / align) * align;
return aligned_width * 8 / 3;
}
static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
int *got_frame, AVPacket *avpkt)
{
V210DecContext *s = avctx->priv_data;
ThreadData td;
int ret, stride, aligned_input;
const uint8_t *psrc = avpkt->data;
if (s->custom_stride )
stride = s->custom_stride > 0 ? s->custom_stride : 0;
else {
stride = v210_stride(avctx->width, 48);
if (avpkt->size < stride * avctx->height) {
int align;
for (align = 24; align >= 6; align >>= 1) {
int small_stride = v210_stride(avctx->width, align);
if (avpkt->size == small_stride * avctx->height) {
stride = small_stride;
if (!s->stride_warning_shown)
av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
s->stride_warning_shown = 1;
break;
}
}
if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
stride = 0;
}
}
if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
return AVERROR_INVALIDDATA;
}
if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height ||
stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return AVERROR_INVALIDDATA;
}
if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
&& avpkt->size > 64
&& AV_RN32(psrc) == AV_RN32("INFO")
&& avpkt->size - 64 >= stride * avctx->height)
psrc += 64;
aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
if (aligned_input != s->aligned_input) {
s->aligned_input = aligned_input;
ff_v210dec_init(s);
}
if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
return ret;
pic->pict_type = AV_PICTURE_TYPE_I;
pic->flags |= AV_FRAME_FLAG_KEY;
if (stride) {
td.stride = stride;
td.buf = psrc;
td.frame = pic;
avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
} else {
uint8_t *pointers[4];
int linesizes[4];
int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
if (ret < 0)
return ret;
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);
av_image_copy2(pic->data, pic->linesize, pointers, linesizes,
avctx->pix_fmt, avctx->width, avctx->height);
av_freep(&pointers[0]);
}
if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
/* we have interlaced material flagged in container */
pic->flags |= AV_FRAME_FLAG_INTERLACED;
if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
pic->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
}
*got_frame = 1;
return avpkt->size;
}
#define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
static const AVOption v210dec_options[] = {
{"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
{.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
{NULL}
};
static const AVClass v210dec_class = {
.class_name = "V210 Decoder",
.item_name = av_default_item_name,
.option = v210dec_options,
.version = LIBAVUTIL_VERSION_INT,
};
const FFCodec ff_v210_decoder = {
.p.name = "v210",
CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
.p.type = AVMEDIA_TYPE_VIDEO,
.p.id = AV_CODEC_ID_V210,
.priv_data_size = sizeof(V210DecContext),
.init = decode_init,
FF_CODEC_DECODE_CB(decode_frame),
.p.capabilities = AV_CODEC_CAP_DR1 |
AV_CODEC_CAP_SLICE_THREADS |
AV_CODEC_CAP_FRAME_THREADS,
.p.priv_class = &v210dec_class,
};
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