216 lines
7.0 KiB
C
216 lines
7.0 KiB
C
/*
|
|
* Raw Video Decoder
|
|
* Copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Raw Video Decoder
|
|
*/
|
|
|
|
#include "avcodec.h"
|
|
#include "imgconvert.h"
|
|
#include "raw.h"
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/imgutils.h"
|
|
|
|
typedef struct RawVideoContext {
|
|
uint32_t palette[AVPALETTE_COUNT];
|
|
unsigned char * buffer; /* block of memory for holding one frame */
|
|
int length; /* number of bytes in buffer */
|
|
int flip;
|
|
AVFrame pic; ///< AVCodecContext.coded_frame
|
|
} RawVideoContext;
|
|
|
|
static const PixelFormatTag pix_fmt_bps_avi[] = {
|
|
{ PIX_FMT_PAL8, 4 },
|
|
{ PIX_FMT_PAL8, 8 },
|
|
{ PIX_FMT_RGB444, 12 },
|
|
{ PIX_FMT_RGB555, 15 },
|
|
{ PIX_FMT_RGB555, 16 },
|
|
{ PIX_FMT_BGR24, 24 },
|
|
{ PIX_FMT_RGB32, 32 },
|
|
{ PIX_FMT_NONE, 0 },
|
|
};
|
|
|
|
static const PixelFormatTag pix_fmt_bps_mov[] = {
|
|
{ PIX_FMT_MONOWHITE, 1 },
|
|
{ PIX_FMT_PAL8, 2 },
|
|
{ PIX_FMT_PAL8, 4 },
|
|
{ PIX_FMT_PAL8, 8 },
|
|
// FIXME swscale does not support 16 bit in .mov, sample 16bit.mov
|
|
// http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html
|
|
{ PIX_FMT_RGB555BE, 16 },
|
|
{ PIX_FMT_RGB24, 24 },
|
|
{ PIX_FMT_ARGB, 32 },
|
|
{ PIX_FMT_MONOWHITE,33 },
|
|
{ PIX_FMT_NONE, 0 },
|
|
};
|
|
|
|
enum PixelFormat ff_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
|
|
{
|
|
while (tags->pix_fmt >= 0) {
|
|
if (tags->fourcc == fourcc)
|
|
return tags->pix_fmt;
|
|
tags++;
|
|
}
|
|
return PIX_FMT_YUV420P;
|
|
}
|
|
|
|
static av_cold int raw_init_decoder(AVCodecContext *avctx)
|
|
{
|
|
RawVideoContext *context = avctx->priv_data;
|
|
|
|
if (avctx->codec_tag == MKTAG('r','a','w',' '))
|
|
avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_mov, avctx->bits_per_coded_sample);
|
|
else if (avctx->codec_tag)
|
|
avctx->pix_fmt = ff_find_pix_fmt(ff_raw_pix_fmt_tags, avctx->codec_tag);
|
|
else if (avctx->pix_fmt == PIX_FMT_NONE && avctx->bits_per_coded_sample)
|
|
avctx->pix_fmt = ff_find_pix_fmt(pix_fmt_bps_avi, avctx->bits_per_coded_sample);
|
|
|
|
ff_set_systematic_pal2(context->palette, avctx->pix_fmt);
|
|
context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
|
|
if((avctx->bits_per_coded_sample == 4 || avctx->bits_per_coded_sample == 2) &&
|
|
avctx->pix_fmt==PIX_FMT_PAL8 &&
|
|
(!avctx->codec_tag || avctx->codec_tag == MKTAG('r','a','w',' '))){
|
|
context->buffer = av_malloc(context->length);
|
|
if (!context->buffer)
|
|
return -1;
|
|
}
|
|
context->pic.pict_type = AV_PICTURE_TYPE_I;
|
|
context->pic.key_frame = 1;
|
|
|
|
avctx->coded_frame= &context->pic;
|
|
|
|
if((avctx->extradata_size >= 9 && !memcmp(avctx->extradata + avctx->extradata_size - 9, "BottomUp", 9)) ||
|
|
avctx->codec_tag == MKTAG( 3 , 0 , 0 , 0 ))
|
|
context->flip=1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void flip(AVCodecContext *avctx, AVPicture * picture){
|
|
picture->data[0] += picture->linesize[0] * (avctx->height-1);
|
|
picture->linesize[0] *= -1;
|
|
}
|
|
|
|
static int raw_decode(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
RawVideoContext *context = avctx->priv_data;
|
|
|
|
AVFrame * frame = (AVFrame *) data;
|
|
AVPicture * picture = (AVPicture *) data;
|
|
|
|
frame->pict_type = avctx->coded_frame->pict_type;
|
|
frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
|
|
frame->top_field_first = avctx->coded_frame->top_field_first;
|
|
frame->reordered_opaque = avctx->reordered_opaque;
|
|
frame->pkt_pts = avctx->pkt->pts;
|
|
frame->pkt_pos = avctx->pkt->pos;
|
|
|
|
//2bpp and 4bpp raw in avi and mov (yes this is ugly ...)
|
|
if (context->buffer) {
|
|
int i;
|
|
uint8_t *dst = context->buffer;
|
|
buf_size = context->length - 256*4;
|
|
if (avctx->bits_per_coded_sample == 4){
|
|
for(i=0; 2*i+1 < buf_size; i++){
|
|
dst[2*i+0]= buf[i]>>4;
|
|
dst[2*i+1]= buf[i]&15;
|
|
}
|
|
} else
|
|
for(i=0; 4*i+3 < buf_size; i++){
|
|
dst[4*i+0]= buf[i]>>6;
|
|
dst[4*i+1]= buf[i]>>4&3;
|
|
dst[4*i+2]= buf[i]>>2&3;
|
|
dst[4*i+3]= buf[i] &3;
|
|
}
|
|
buf= dst;
|
|
}
|
|
|
|
if(avctx->codec_tag == MKTAG('A', 'V', '1', 'x') ||
|
|
avctx->codec_tag == MKTAG('A', 'V', 'u', 'p'))
|
|
buf += buf_size - context->length;
|
|
|
|
if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
|
|
return -1;
|
|
|
|
avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
|
|
if((avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length) ||
|
|
(avctx->pix_fmt!=PIX_FMT_PAL8 &&
|
|
(av_pix_fmt_descriptors[avctx->pix_fmt].flags & PIX_FMT_PAL))){
|
|
frame->data[1]= context->palette;
|
|
}
|
|
if (avctx->pix_fmt == PIX_FMT_PAL8) {
|
|
const uint8_t *pal = av_packet_get_side_data(avpkt, AV_PKT_DATA_PALETTE, NULL);
|
|
|
|
if (pal) {
|
|
memcpy(frame->data[1], pal, AVPALETTE_SIZE);
|
|
frame->palette_has_changed = 1;
|
|
}
|
|
}
|
|
if(avctx->pix_fmt==PIX_FMT_BGR24 && ((frame->linesize[0]+3)&~3)*avctx->height <= buf_size)
|
|
frame->linesize[0] = (frame->linesize[0]+3)&~3;
|
|
|
|
if(context->flip)
|
|
flip(avctx, picture);
|
|
|
|
if ( avctx->codec_tag == MKTAG('Y', 'V', '1', '2')
|
|
|| avctx->codec_tag == MKTAG('Y', 'V', 'U', '9'))
|
|
FFSWAP(uint8_t *, picture->data[1], picture->data[2]);
|
|
|
|
if(avctx->codec_tag == AV_RL32("yuv2") &&
|
|
avctx->pix_fmt == PIX_FMT_YUYV422) {
|
|
int x, y;
|
|
uint8_t *line = picture->data[0];
|
|
for(y = 0; y < avctx->height; y++) {
|
|
for(x = 0; x < avctx->width; x++)
|
|
line[2*x + 1] ^= 0x80;
|
|
line += picture->linesize[0];
|
|
}
|
|
}
|
|
|
|
*data_size = sizeof(AVPicture);
|
|
return buf_size;
|
|
}
|
|
|
|
static av_cold int raw_close_decoder(AVCodecContext *avctx)
|
|
{
|
|
RawVideoContext *context = avctx->priv_data;
|
|
|
|
av_freep(&context->buffer);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec ff_rawvideo_decoder = {
|
|
"rawvideo",
|
|
AVMEDIA_TYPE_VIDEO,
|
|
CODEC_ID_RAWVIDEO,
|
|
sizeof(RawVideoContext),
|
|
raw_init_decoder,
|
|
NULL,
|
|
raw_close_decoder,
|
|
raw_decode,
|
|
.long_name = NULL_IF_CONFIG_SMALL("raw video"),
|
|
};
|