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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 "v210dec.h"
#include "libavutil/bswap.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#define READ_PIXELS(a, b, c) \
do { \
val = av_le2ne32(*src++); \
*a++ = val & 0x3FF; \
*b++ = (val >> 10) & 0x3FF; \
*c++ = (val >> 20) & 0x3FF; \
} while (0)
static void v210_planar_unpack_c(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width)
{
uint32_t val;
int i;
for( i = 0; i < width-5; i += 6 ){
READ_PIXELS(u, y, v);
READ_PIXELS(y, u, y);
READ_PIXELS(v, y, u);
READ_PIXELS(y, v, y);
}
}
static av_cold int decode_init(AVCodecContext *avctx)
{
V210DecContext *s = avctx->priv_data;
if (avctx->width & 1) {
av_log(avctx, AV_LOG_ERROR, "v210 needs even width\n");
return -1;
}
avctx->pix_fmt = PIX_FMT_YUV422P10;
avctx->bits_per_raw_sample = 10;
avctx->coded_frame = avcodec_alloc_frame();
if (!avctx->coded_frame)
return AVERROR(ENOMEM);
s->unpack_frame = v210_planar_unpack_c;
if (HAVE_MMX)
v210_x86_init(s);
return 0;
}
static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
AVPacket *avpkt)
{
V210DecContext *s = avctx->priv_data;
int h, w, stride, aligned_input;
AVFrame *pic = avctx->coded_frame;
const uint8_t *psrc = avpkt->data;
uint16_t *y, *u, *v;
if (s->custom_stride )
stride = s->custom_stride;
else {
int aligned_width = ((avctx->width + 47) / 48) * 48;
stride = aligned_width * 8 / 3;
}
if (avpkt->size < stride * avctx->height) {
if ((((avctx->width + 23) / 24) * 24 * 8) / 3 * avctx->height == avpkt->size) {
stride = avpkt->size / avctx->height;
if (!s->stride_warning_shown)
av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (64 byte) detected\n");
s->stride_warning_shown = 1;
} else {
av_log(avctx, AV_LOG_ERROR, "packet too small\n");
return -1;
}
}
aligned_input = !((uintptr_t)psrc & 0xf) && !(stride & 0xf);
if (aligned_input != s->aligned_input) {
s->aligned_input = aligned_input;
if (HAVE_MMX)
v210_x86_init(s);
}
if (pic->data[0])
avctx->release_buffer(avctx, pic);
pic->reference = 0;
if (avctx->get_buffer(avctx, pic) < 0)
return -1;
y = (uint16_t*)pic->data[0];
u = (uint16_t*)pic->data[1];
v = (uint16_t*)pic->data[2];
pic->pict_type = AV_PICTURE_TYPE_I;
pic->key_frame = 1;
for (h = 0; h < avctx->height; h++) {
const uint32_t *src = (const uint32_t*)psrc;
uint32_t val;
w = (avctx->width / 6) * 6;
s->unpack_frame(src, y, u, v, w);
y += w;
u += w >> 1;
v += w >> 1;
src += (w << 1) / 3;
if (w < avctx->width - 1) {
READ_PIXELS(u, y, v);
val = av_le2ne32(*src++);
*y++ = val & 0x3FF;
if (w < avctx->width - 3) {
*u++ = (val >> 10) & 0x3FF;
*y++ = (val >> 20) & 0x3FF;
val = av_le2ne32(*src++);
*v++ = val & 0x3FF;
*y++ = (val >> 10) & 0x3FF;
}
}
psrc += stride;
y += pic->linesize[0] / 2 - avctx->width;
u += pic->linesize[1] / 2 - avctx->width / 2;
v += pic->linesize[2] / 2 - avctx->width / 2;
}
*data_size = sizeof(AVFrame);
*(AVFrame*)data = *avctx->coded_frame;
return avpkt->size;
}
static av_cold int decode_close(AVCodecContext *avctx)
{
AVFrame *pic = avctx->coded_frame;
if (pic->data[0])
avctx->release_buffer(avctx, pic);
av_freep(&avctx->coded_frame);
return 0;
}
#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), FF_OPT_TYPE_INT,
{.dbl = 0}, INT_MIN, INT_MAX, V210DEC_FLAGS},
{NULL}
};
static const AVClass v210dec_class = {
"V210 Decoder",
av_default_item_name,
v210dec_options,
LIBAVUTIL_VERSION_INT,
};
AVCodec ff_v210_decoder = {
.name = "v210",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_V210,
.priv_data_size = sizeof(V210DecContext),
.init = decode_init,
.close = decode_close,
.decode = decode_frame,
.capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:2:2 10-bit"),
.priv_class = &v210dec_class,
};
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