* Electronic Arts TGQ Video Decoder
* Copyright (c) 2007-2008 Peter Ross <pross@xvid.org>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/eatgq.c
+ * @file
* Electronic Arts TGQ Video Decoder
* @author Peter Ross <pross@xvid.org>
*
*/
#include "avcodec.h"
-#define ALT_BITSTREAM_READER_LE
-#include "bitstream.h"
+#define BITSTREAM_READER_LE
+#include "get_bits.h"
#include "bytestream.h"
#include "dsputil.h"
#include "aandcttab.h"
int width,height;
ScanTable scantable;
int qtable[64];
+ DECLARE_ALIGNED(16, DCTELEM, block)[6][64];
+ GetByteContext gb;
} TgqContext;
static av_cold int tgq_decode_init(AVCodecContext *avctx){
s->avctx = avctx;
if(avctx->idct_algo==FF_IDCT_AUTO)
avctx->idct_algo=FF_IDCT_EA;
- dsputil_init(&s->dsp, avctx);
+ ff_dsputil_init(&s->dsp, avctx);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
avctx->time_base = (AVRational){1, 15};
avctx->pix_fmt = PIX_FMT_YUV420P;
}
}
-static void tgq_decode_mb(TgqContext *s, int mb_y, int mb_x, const int8_t **bs, const int8_t *buf_end){
+static void tgq_decode_mb(TgqContext *s, int mb_y, int mb_x){
int mode;
int i;
int8_t dc[6];
- DCTELEM block[6][64];
-
- mode = bytestream_get_byte((const uint8_t**)bs);
- if (mode>buf_end-*bs) {
- av_log(s->avctx, AV_LOG_ERROR, "truncated macroblock\n");
- return;
- }
+ mode = bytestream2_get_byte(&s->gb);
if (mode>12) {
GetBitContext gb;
- init_get_bits(&gb, *bs, mode*8);
+ init_get_bits(&gb, s->gb.buffer, FFMIN(s->gb.buffer_end - s->gb.buffer, mode) * 8);
for(i=0; i<6; i++)
- tgq_decode_block(s, block[i], &gb);
- tgq_idct_put_mb(s, block, mb_x, mb_y);
+ tgq_decode_block(s, s->block[i], &gb);
+ tgq_idct_put_mb(s, s->block, mb_x, mb_y);
+ bytestream2_skip(&s->gb, mode);
}else{
if (mode==3) {
- memset(dc, (*bs)[0], 4);
- dc[4] = (*bs)[1];
- dc[5] = (*bs)[2];
+ memset(dc, bytestream2_get_byte(&s->gb), 4);
+ dc[4] = bytestream2_get_byte(&s->gb);
+ dc[5] = bytestream2_get_byte(&s->gb);
}else if (mode==6) {
- memcpy(dc, *bs, 6);
+ bytestream2_get_buffer(&s->gb, dc, 6);
}else if (mode==12) {
- for(i=0; i<6; i++)
- dc[i] = (*bs)[i*2];
+ for (i = 0; i < 6; i++) {
+ dc[i] = bytestream2_get_byte(&s->gb);
+ bytestream2_skip(&s->gb, 1);
+ }
}else{
av_log(s->avctx, AV_LOG_ERROR, "unsupported mb mode %i\n", mode);
}
tgq_idct_put_mb_dconly(s, mb_x, mb_y, dc);
}
- *bs += mode;
}
static void tgq_calculate_qtable(TgqContext *s, int quant){
AVPacket *avpkt){
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
- const uint8_t *buf_start = buf;
- const uint8_t *buf_end = buf + buf_size;
TgqContext *s = avctx->priv_data;
int x,y;
-
int big_endian = AV_RL32(&buf[4]) > 0x000FFFFF;
- buf += 8;
- if(8>buf_end-buf) {
+ if (buf_size < 16) {
av_log(avctx, AV_LOG_WARNING, "truncated header\n");
return -1;
}
- s->width = big_endian ? AV_RB16(&buf[0]) : AV_RL16(&buf[0]);
- s->height = big_endian ? AV_RB16(&buf[2]) : AV_RL16(&buf[2]);
+ bytestream2_init(&s->gb, buf + 8, buf_size - 8);
+ if (big_endian) {
+ s->width = bytestream2_get_be16u(&s->gb);
+ s->height = bytestream2_get_be16u(&s->gb);
+ } else {
+ s->width = bytestream2_get_le16u(&s->gb);
+ s->height = bytestream2_get_le16u(&s->gb);
+ }
if (s->avctx->width!=s->width || s->avctx->height!=s->height) {
avcodec_set_dimensions(s->avctx, s->width, s->height);
if (s->frame.data[0])
avctx->release_buffer(avctx, &s->frame);
}
- tgq_calculate_qtable(s, buf[4]);
- buf += 8;
+ tgq_calculate_qtable(s, bytestream2_get_byteu(&s->gb));
+ bytestream2_skip(&s->gb, 3);
if (!s->frame.data[0]) {
s->frame.key_frame = 1;
- s->frame.pict_type = FF_I_TYPE;
+ s->frame.pict_type = AV_PICTURE_TYPE_I;
s->frame.buffer_hints = FF_BUFFER_HINTS_VALID;
if (avctx->get_buffer(avctx, &s->frame)) {
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
}
}
- for (y=0; y<(avctx->height+15)/16; y++)
- for (x=0; x<(avctx->width+15)/16; x++)
- tgq_decode_mb(s, y, x, (const int8_t**)&buf, (const int8_t*)buf_end);
+ for (y = 0; y < FFALIGN(avctx->height, 16) >> 4; y++)
+ for (x = 0; x < FFALIGN(avctx->width, 16) >> 4; x++)
+ tgq_decode_mb(s, y, x);
*data_size = sizeof(AVFrame);
*(AVFrame*)data = s->frame;
- return buf-buf_start;
+ return avpkt->size;
}
static av_cold int tgq_decode_end(AVCodecContext *avctx){
return 0;
}
-AVCodec eatgq_decoder = {
- "eatgq",
- CODEC_TYPE_VIDEO,
- CODEC_ID_TGQ,
- sizeof(TgqContext),
- tgq_decode_init,
- NULL,
- tgq_decode_end,
- tgq_decode_frame,
- CODEC_CAP_DR1,
- .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TGQ video"),
+AVCodec ff_eatgq_decoder = {
+ .name = "eatgq",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = CODEC_ID_TGQ,
+ .priv_data_size = sizeof(TgqContext),
+ .init = tgq_decode_init,
+ .close = tgq_decode_end,
+ .decode = tgq_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
+ .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TGQ video"),
};
projects / ffmpeg / blobdiff