mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-22 09:15:06 +02:00
![Michael Niedermayer](/assets/img/avatar_default.png)
* qatar/master: rtpdec_asf: Set the no_resync_search option for the chained asf demuxer asfdec: Add an option for not searching for the packet markers cosmetics: Clean up the tiffenc pix_fmts declaration to match the style of others cosmetics: Align codec declarations cosmetics: Convert mimic.c to utf-8 avconv: remove an unused function parameter. avconv: remove now pointless variables. avconv: drop support for building without libavfilter. nellymoserenc: fix crash due to memsetting the wrong area. libavformat: Only require first packet to be known for audio/video streams avplay: Don't try to scale timestamps if the tb isn't set Conflicts: Changelog configure ffmpeg.c libavcodec/aacenc.c libavcodec/bmpenc.c libavcodec/dnxhddec.c libavcodec/dnxhdenc.c libavcodec/ffv1.c libavcodec/flacenc.c libavcodec/fraps.c libavcodec/huffyuv.c libavcodec/libopenjpegdec.c libavcodec/mpeg12enc.c libavcodec/mpeg4videodec.c libavcodec/pamenc.c libavcodec/pgssubdec.c libavcodec/pngenc.c libavcodec/qtrleenc.c libavcodec/rawdec.c libavcodec/sgienc.c libavcodec/tiffenc.c libavcodec/v210dec.c libavcodec/wmv2dec.c libavformat/utils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
208 lines
6.3 KiB
C
208 lines
6.3 KiB
C
/*
|
|
* Creative YUV (CYUV) Video Decoder
|
|
* by Mike Melanson (melanson@pcisys.net)
|
|
* based on "Creative YUV (CYUV) stream format for AVI":
|
|
* http://www.csse.monash.edu.au/~timf/videocodec/cyuv.txt
|
|
*
|
|
* Copyright (C) 2003 the ffmpeg project
|
|
*
|
|
* 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
|
|
* Creative YUV (CYUV) Video Decoder.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "avcodec.h"
|
|
#include "dsputil.h"
|
|
|
|
|
|
typedef struct CyuvDecodeContext {
|
|
AVCodecContext *avctx;
|
|
int width, height;
|
|
AVFrame frame;
|
|
} CyuvDecodeContext;
|
|
|
|
static av_cold int cyuv_decode_init(AVCodecContext *avctx)
|
|
{
|
|
CyuvDecodeContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
s->width = avctx->width;
|
|
/* width needs to be divisible by 4 for this codec to work */
|
|
if (s->width & 0x3)
|
|
return -1;
|
|
s->height = avctx->height;
|
|
avctx->pix_fmt = PIX_FMT_YUV411P;
|
|
avcodec_get_frame_defaults(&s->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cyuv_decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
AVPacket *avpkt)
|
|
{
|
|
const uint8_t *buf = avpkt->data;
|
|
int buf_size = avpkt->size;
|
|
CyuvDecodeContext *s=avctx->priv_data;
|
|
|
|
unsigned char *y_plane;
|
|
unsigned char *u_plane;
|
|
unsigned char *v_plane;
|
|
int y_ptr;
|
|
int u_ptr;
|
|
int v_ptr;
|
|
|
|
/* prediction error tables (make it clear that they are signed values) */
|
|
const signed char *y_table = (const signed char*)buf + 0;
|
|
const signed char *u_table = (const signed char*)buf + 16;
|
|
const signed char *v_table = (const signed char*)buf + 32;
|
|
|
|
unsigned char y_pred, u_pred, v_pred;
|
|
int stream_ptr;
|
|
unsigned char cur_byte;
|
|
int pixel_groups;
|
|
|
|
if (avctx->codec_id == CODEC_ID_AURA) {
|
|
y_table = u_table;
|
|
u_table = v_table;
|
|
}
|
|
/* sanity check the buffer size: A buffer has 3x16-bytes tables
|
|
* followed by (height) lines each with 3 bytes to represent groups
|
|
* of 4 pixels. Thus, the total size of the buffer ought to be:
|
|
* (3 * 16) + height * (width * 3 / 4) */
|
|
if (buf_size != 48 + s->height * (s->width * 3 / 4)) {
|
|
av_log(avctx, AV_LOG_ERROR, "got a buffer with %d bytes when %d were expected\n",
|
|
buf_size, 48 + s->height * (s->width * 3 / 4));
|
|
return -1;
|
|
}
|
|
|
|
/* pixel data starts 48 bytes in, after 3x16-byte tables */
|
|
stream_ptr = 48;
|
|
|
|
if (s->frame.data[0])
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
|
|
s->frame.reference = 0;
|
|
if (avctx->get_buffer(avctx, &s->frame) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
y_plane = s->frame.data[0];
|
|
u_plane = s->frame.data[1];
|
|
v_plane = s->frame.data[2];
|
|
|
|
/* iterate through each line in the height */
|
|
for (y_ptr = 0, u_ptr = 0, v_ptr = 0;
|
|
y_ptr < (s->height * s->frame.linesize[0]);
|
|
y_ptr += s->frame.linesize[0] - s->width,
|
|
u_ptr += s->frame.linesize[1] - s->width / 4,
|
|
v_ptr += s->frame.linesize[2] - s->width / 4) {
|
|
|
|
/* reset predictors */
|
|
cur_byte = buf[stream_ptr++];
|
|
u_plane[u_ptr++] = u_pred = cur_byte & 0xF0;
|
|
y_plane[y_ptr++] = y_pred = (cur_byte & 0x0F) << 4;
|
|
|
|
cur_byte = buf[stream_ptr++];
|
|
v_plane[v_ptr++] = v_pred = cur_byte & 0xF0;
|
|
y_pred += y_table[cur_byte & 0x0F];
|
|
y_plane[y_ptr++] = y_pred;
|
|
|
|
cur_byte = buf[stream_ptr++];
|
|
y_pred += y_table[cur_byte & 0x0F];
|
|
y_plane[y_ptr++] = y_pred;
|
|
y_pred += y_table[(cur_byte & 0xF0) >> 4];
|
|
y_plane[y_ptr++] = y_pred;
|
|
|
|
/* iterate through the remaining pixel groups (4 pixels/group) */
|
|
pixel_groups = s->width / 4 - 1;
|
|
while (pixel_groups--) {
|
|
|
|
cur_byte = buf[stream_ptr++];
|
|
u_pred += u_table[(cur_byte & 0xF0) >> 4];
|
|
u_plane[u_ptr++] = u_pred;
|
|
y_pred += y_table[cur_byte & 0x0F];
|
|
y_plane[y_ptr++] = y_pred;
|
|
|
|
cur_byte = buf[stream_ptr++];
|
|
v_pred += v_table[(cur_byte & 0xF0) >> 4];
|
|
v_plane[v_ptr++] = v_pred;
|
|
y_pred += y_table[cur_byte & 0x0F];
|
|
y_plane[y_ptr++] = y_pred;
|
|
|
|
cur_byte = buf[stream_ptr++];
|
|
y_pred += y_table[cur_byte & 0x0F];
|
|
y_plane[y_ptr++] = y_pred;
|
|
y_pred += y_table[(cur_byte & 0xF0) >> 4];
|
|
y_plane[y_ptr++] = y_pred;
|
|
|
|
}
|
|
}
|
|
|
|
*data_size=sizeof(AVFrame);
|
|
*(AVFrame*)data= s->frame;
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
static av_cold int cyuv_decode_end(AVCodecContext *avctx)
|
|
{
|
|
CyuvDecodeContext *s = avctx->priv_data;
|
|
|
|
if (s->frame.data[0])
|
|
avctx->release_buffer(avctx, &s->frame);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if CONFIG_AURA_DECODER
|
|
AVCodec ff_aura_decoder = {
|
|
.name = "aura",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_AURA,
|
|
.priv_data_size = sizeof(CyuvDecodeContext),
|
|
.init = cyuv_decode_init,
|
|
.close = cyuv_decode_end,
|
|
.decode = cyuv_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Auravision AURA"),
|
|
};
|
|
#endif
|
|
|
|
#if CONFIG_CYUV_DECODER
|
|
AVCodec ff_cyuv_decoder = {
|
|
.name = "cyuv",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.id = CODEC_ID_CYUV,
|
|
.priv_data_size = sizeof(CyuvDecodeContext),
|
|
.init = cyuv_decode_init,
|
|
.close = cyuv_decode_end,
|
|
.decode = cyuv_decode_frame,
|
|
.capabilities = CODEC_CAP_DR1,
|
|
.long_name = NULL_IF_CONFIG_SMALL("Creative YUV (CYUV)"),
|
|
};
|
|
#endif
|