* 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>
*
* http://wiki.multimedia.cx/index.php?title=Electronic_Arts_TGQ
*/
+#define BITSTREAM_READER_LE
+#include "aandcttab.h"
#include "avcodec.h"
-#define ALT_BITSTREAM_READER_LE
-#include "get_bits.h"
+#include "bitstream.h"
#include "bytestream.h"
-#include "dsputil.h"
-#include "aandcttab.h"
+#include "eaidct.h"
+#include "idctdsp.h"
+#include "internal.h"
typedef struct TgqContext {
AVCodecContext *avctx;
- DSPContext dsp;
- AVFrame frame;
- int width,height;
+ int width, height;
ScanTable scantable;
int qtable[64];
+ DECLARE_ALIGNED(16, int16_t, block)[6][64];
+ GetByteContext gb;
} TgqContext;
-static av_cold int tgq_decode_init(AVCodecContext *avctx){
+static av_cold int tgq_decode_init(AVCodecContext *avctx)
+{
TgqContext *s = avctx->priv_data;
+ uint8_t idct_permutation[64];
s->avctx = avctx;
- if(avctx->idct_algo==FF_IDCT_AUTO)
- avctx->idct_algo=FF_IDCT_EA;
- 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;
+ ff_init_scantable_permutation(idct_permutation, FF_IDCT_PERM_NONE);
+ ff_init_scantable(idct_permutation, &s->scantable, ff_zigzag_direct);
+ avctx->framerate = (AVRational){ 15, 1 };
+ avctx->pix_fmt = AV_PIX_FMT_YUV420P;
return 0;
}
-static void tgq_decode_block(TgqContext *s, DCTELEM block[64], GetBitContext *gb){
+static void tgq_decode_block(TgqContext *s, int16_t block[64], BitstreamContext *bc)
+{
uint8_t *perm = s->scantable.permutated;
- int i,j,value;
- block[0] = get_sbits(gb,8) * s->qtable[0];
- for(i=1; i<64; ) {
- switch(show_bits(gb,3)) {
+ int i, j, value;
+ block[0] = bitstream_read_signed(bc, 8) * s->qtable[0];
+ for (i = 1; i < 64;) {
+ switch (bitstream_peek(bc, 3)) {
case 4:
block[perm[i++]] = 0;
case 0:
block[perm[i++]] = 0;
- skip_bits(gb,3);
+ bitstream_skip(bc, 3);
break;
case 5:
case 1:
- skip_bits(gb,2);
- value = get_bits(gb,6);
- for(j=0; j<value; j++)
+ bitstream_skip(bc, 2);
+ value = bitstream_read(bc, 6);
+ for (j = 0; j < value; j++)
block[perm[i++]] = 0;
break;
case 6:
- skip_bits(gb,3);
+ bitstream_skip(bc, 3);
block[perm[i]] = -s->qtable[perm[i]];
i++;
break;
case 2:
- skip_bits(gb,3);
+ bitstream_skip(bc, 3);
block[perm[i]] = s->qtable[perm[i]];
i++;
break;
case 7: // 111b
case 3: // 011b
- skip_bits(gb,2);
- if (show_bits(gb,6)==0x3F) {
- skip_bits(gb, 6);
- block[perm[i]] = get_sbits(gb,8)*s->qtable[perm[i]];
- }else{
- block[perm[i]] = get_sbits(gb,6)*s->qtable[perm[i]];
+ bitstream_skip(bc, 2);
+ if (bitstream_peek(bc, 6) == 0x3F) {
+ bitstream_skip(bc, 6);
+ block[perm[i]] = bitstream_read_signed(bc, 8) * s->qtable[perm[i]];
+ } else {
+ block[perm[i]] = bitstream_read_signed(bc, 6) * s->qtable[perm[i]];
}
i++;
break;
}
}
- block[0] += 128<<4;
+ block[0] += 128 << 4;
}
-static void tgq_idct_put_mb(TgqContext *s, DCTELEM (*block)[64], int mb_x, int mb_y){
- int linesize= s->frame.linesize[0];
- uint8_t *dest_y = s->frame.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
- uint8_t *dest_cb = s->frame.data[1] + (mb_y * 8 * s->frame.linesize[1]) + mb_x * 8;
- uint8_t *dest_cr = s->frame.data[2] + (mb_y * 8 * s->frame.linesize[2]) + mb_x * 8;
-
- s->dsp.idct_put(dest_y , linesize, block[0]);
- s->dsp.idct_put(dest_y + 8, linesize, block[1]);
- s->dsp.idct_put(dest_y + 8*linesize , linesize, block[2]);
- s->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
- if(!(s->avctx->flags&CODEC_FLAG_GRAY)){
- s->dsp.idct_put(dest_cb, s->frame.linesize[1], block[4]);
- s->dsp.idct_put(dest_cr, s->frame.linesize[2], block[5]);
+static void tgq_idct_put_mb(TgqContext *s, int16_t (*block)[64], AVFrame *frame,
+ int mb_x, int mb_y)
+{
+ ptrdiff_t linesize = frame->linesize[0];
+ uint8_t *dest_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
+ uint8_t *dest_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
+ uint8_t *dest_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
+
+ ff_ea_idct_put_c(dest_y , linesize, block[0]);
+ ff_ea_idct_put_c(dest_y + 8, linesize, block[1]);
+ ff_ea_idct_put_c(dest_y + 8 * linesize , linesize, block[2]);
+ ff_ea_idct_put_c(dest_y + 8 * linesize + 8, linesize, block[3]);
+ if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
+ ff_ea_idct_put_c(dest_cb, frame->linesize[1], block[4]);
+ ff_ea_idct_put_c(dest_cr, frame->linesize[2], block[5]);
}
}
-static inline void tgq_dconly(TgqContext *s, unsigned char *dst, int dst_stride, int dc){
- int level = av_clip_uint8((dc*s->qtable[0] + 2056)>>4);
+static inline void tgq_dconly(TgqContext *s, unsigned char *dst,
+ ptrdiff_t dst_stride, int dc)
+{
+ int level = av_clip_uint8((dc*s->qtable[0] + 2056) >> 4);
int j;
- for(j=0;j<8;j++)
- memset(dst+j*dst_stride, level, 8);
+ for (j = 0; j < 8; j++)
+ memset(dst + j * dst_stride, level, 8);
}
-static void tgq_idct_put_mb_dconly(TgqContext *s, int mb_x, int mb_y, const int8_t *dc)
+static void tgq_idct_put_mb_dconly(TgqContext *s, AVFrame *frame,
+ int mb_x, int mb_y, const int8_t *dc)
{
- int linesize= s->frame.linesize[0];
- uint8_t *dest_y = s->frame.data[0] + (mb_y * 16* linesize ) + mb_x * 16;
- uint8_t *dest_cb = s->frame.data[1] + (mb_y * 8 * s->frame.linesize[1]) + mb_x * 8;
- uint8_t *dest_cr = s->frame.data[2] + (mb_y * 8 * s->frame.linesize[2]) + mb_x * 8;
- tgq_dconly(s,dest_y , linesize, dc[0]);
- tgq_dconly(s,dest_y + 8, linesize, dc[1]);
- tgq_dconly(s,dest_y + 8*linesize , linesize, dc[2]);
- tgq_dconly(s,dest_y + 8*linesize + 8, linesize, dc[3]);
- if(!(s->avctx->flags&CODEC_FLAG_GRAY)) {
- tgq_dconly(s,dest_cb, s->frame.linesize[1], dc[4]);
- tgq_dconly(s,dest_cr, s->frame.linesize[2], dc[5]);
+ ptrdiff_t linesize = frame->linesize[0];
+ uint8_t *dest_y = frame->data[0] + (mb_y * 16 * linesize) + mb_x * 16;
+ uint8_t *dest_cb = frame->data[1] + (mb_y * 8 * frame->linesize[1]) + mb_x * 8;
+ uint8_t *dest_cr = frame->data[2] + (mb_y * 8 * frame->linesize[2]) + mb_x * 8;
+ tgq_dconly(s, dest_y, linesize, dc[0]);
+ tgq_dconly(s, dest_y + 8, linesize, dc[1]);
+ tgq_dconly(s, dest_y + 8 * linesize, linesize, dc[2]);
+ tgq_dconly(s, dest_y + 8 * linesize + 8, linesize, dc[3]);
+ if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
+ tgq_dconly(s, dest_cb, frame->linesize[1], dc[4]);
+ tgq_dconly(s, dest_cr, frame->linesize[2], dc[5]);
}
}
-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, AVFrame *frame, 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;
- }
- if (mode>12) {
- GetBitContext gb;
- init_get_bits(&gb, *bs, 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);
- }else{
- if (mode==3) {
- memset(dc, (*bs)[0], 4);
- dc[4] = (*bs)[1];
- dc[5] = (*bs)[2];
- }else if (mode==6) {
- memcpy(dc, *bs, 6);
- }else if (mode==12) {
- for(i=0; i<6; i++)
- dc[i] = (*bs)[i*2];
- }else{
+ mode = bytestream2_get_byte(&s->gb);
+ if (mode > 12) {
+ BitstreamContext bc;
+ bitstream_init(&bc, s->gb.buffer, FFMIN(s->gb.buffer_end - s->gb.buffer, mode) * 8);
+ for (i = 0; i < 6; i++)
+ tgq_decode_block(s, s->block[i], &bc);
+ tgq_idct_put_mb(s, s->block, frame, mb_x, mb_y);
+ bytestream2_skip(&s->gb, mode);
+ } else {
+ if (mode == 3) {
+ 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) {
+ bytestream2_get_buffer(&s->gb, dc, 6);
+ } else if (mode == 12) {
+ 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);
+ tgq_idct_put_mb_dconly(s, frame, mb_x, mb_y, dc);
}
- *bs += mode;
}
-static void tgq_calculate_qtable(TgqContext *s, int quant){
- int i,j;
- const int a = (14*(100-quant))/100 + 1;
- const int b = (11*(100-quant))/100 + 4;
- for(j=0;j<8;j++)
- for(i=0;i<8;i++)
- if (s->avctx->idct_algo==FF_IDCT_EA)
- s->qtable[j*8+i] = ((a*(j+i)/(7+7) + b)*ff_inv_aanscales[j*8+i])>>(14-4);
- else
- s->qtable[j*8+i] = (a*(j+i)/(7+7) + b)<<3;
+static void tgq_calculate_qtable(TgqContext *s, int quant)
+{
+ int i, j;
+ const int a = (14 * (100 - quant)) / 100 + 1;
+ const int b = (11 * (100 - quant)) / 100 + 4;
+ for (j = 0; j < 8; j++)
+ for (i = 0; i < 8; i++)
+ s->qtable[j * 8 + i] = ((a * (j + i) / (7 + 7) + b) *
+ ff_inv_aanscales[j * 8 + i]) >> (14 - 4);
}
static int tgq_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- AVPacket *avpkt){
+ void *data, int *got_frame,
+ 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 buf_size = avpkt->size;
+ TgqContext *s = avctx->priv_data;
+ AVFrame *frame = data;
+ int x, y, ret;
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;
+ return AVERROR_INVALIDDATA;
}
- s->width = big_endian ? AV_RB16(&buf[0]) : AV_RL16(&buf[0]);
- s->height = big_endian ? AV_RB16(&buf[2]) : AV_RL16(&buf[2]);
-
- 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);
+ 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);
}
- tgq_calculate_qtable(s, buf[4]);
- buf += 8;
- if (!s->frame.data[0]) {
- s->frame.key_frame = 1;
- s->frame.pict_type = FF_I_TYPE;
- 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");
- return -1;
- }
- }
+ ret = ff_set_dimensions(s->avctx, s->width, s->height);
+ if (ret < 0)
+ return ret;
- 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);
+ tgq_calculate_qtable(s, bytestream2_get_byteu(&s->gb));
+ bytestream2_skip(&s->gb, 3);
- *data_size = sizeof(AVFrame);
- *(AVFrame*)data = s->frame;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ frame->key_frame = 1;
+ frame->pict_type = AV_PICTURE_TYPE_I;
- return buf-buf_start;
-}
+ for (y = 0; y < FFALIGN(avctx->height, 16) >> 4; y++)
+ for (x = 0; x < FFALIGN(avctx->width, 16) >> 4; x++)
+ tgq_decode_mb(s, frame, y, x);
-static av_cold int tgq_decode_end(AVCodecContext *avctx){
- TgqContext *s = avctx->priv_data;
- if (s->frame.data[0])
- s->avctx->release_buffer(avctx, &s->frame);
- return 0;
+ *got_frame = 1;
+
+ return avpkt->size;
}
-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",
+ .long_name = NULL_IF_CONFIG_SMALL("Electronic Arts TGQ video"),
+ .type = AVMEDIA_TYPE_VIDEO,
+ .id = AV_CODEC_ID_TGQ,
+ .priv_data_size = sizeof(TgqContext),
+ .init = tgq_decode_init,
+ .decode = tgq_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
};
projects / ffmpeg / blobdiff