#include "idctdsp.h"
#include "internal.h"
#include "mpeg12.h"
-#include "mpegvideo.h"
typedef struct TqiContext {
- MpegEncContext s;
+ AVCodecContext *avctx;
+ GetBitContext gb;
+ BlockDSPContext bdsp;
BswapDSPContext bsdsp;
+ IDCTDSPContext idsp;
+ ScanTable intra_scantable;
+
void *bitstream_buf;
unsigned int bitstream_buf_size;
+
+ int mb_x, mb_y;
+ uint16_t intra_matrix[64];
+ int last_dc[3];
+
DECLARE_ALIGNED(16, int16_t, block)[6][64];
} TqiContext;
static av_cold int tqi_decode_init(AVCodecContext *avctx)
{
TqiContext *t = avctx->priv_data;
- MpegEncContext *s = &t->s;
- s->avctx = avctx;
- ff_blockdsp_init(&s->bdsp, avctx);
+
+ ff_blockdsp_init(&t->bdsp, avctx);
ff_bswapdsp_init(&t->bsdsp);
- ff_idctdsp_init(&s->idsp, avctx);
- ff_init_scantable_permutation(s->idsp.idct_permutation, FF_IDCT_PERM_NONE);
- ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
- s->qscale = 1;
+ ff_idctdsp_init(&t->idsp, avctx);
+ ff_init_scantable_permutation(t->idsp.idct_permutation, FF_IDCT_PERM_NONE);
+ ff_init_scantable(t->idsp.idct_permutation, &t->intra_scantable, ff_zigzag_direct);
+
avctx->framerate = (AVRational){ 15, 1 };
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
ff_mpeg12_init_vlcs();
return 0;
}
-static int tqi_decode_mb(MpegEncContext *s, int16_t (*block)[64])
+static int tqi_decode_mb(TqiContext *t, int16_t (*block)[64])
{
int n;
- s->bdsp.clear_blocks(block[0]);
- for (n=0; n<6; n++)
- if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0)
+
+ t->bdsp.clear_blocks(block[0]);
+ for (n = 0; n < 6; n++) {
+ int ret = ff_mpeg1_decode_block_intra(&t->gb,
+ t->intra_matrix,
+ t->intra_scantable.permutated,
+ t->last_dc, block[n], n, 1);
+ if (ret < 0) {
+ av_log(t->avctx, AV_LOG_ERROR, "ac-tex damaged at %d %d\n",
+ t->mb_x, t->mb_y);
return -1;
+ }
+ }
return 0;
}
-static inline void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t (*block)[64])
+static inline void tqi_idct_put(AVCodecContext *avctx, AVFrame *frame,
+ int16_t (*block)[64])
{
- MpegEncContext *s = &t->s;
+ TqiContext *t = avctx->priv_data;
int linesize = frame->linesize[0];
- uint8_t *dest_y = frame->data[0] + (s->mb_y * 16* linesize ) + s->mb_x * 16;
- uint8_t *dest_cb = frame->data[1] + (s->mb_y * 8 * frame->linesize[1]) + s->mb_x * 8;
- uint8_t *dest_cr = frame->data[2] + (s->mb_y * 8 * frame->linesize[2]) + s->mb_x * 8;
+ uint8_t *dest_y = frame->data[0] + t->mb_y * 16 * linesize + t->mb_x * 16;
+ uint8_t *dest_cb = frame->data[1] + t->mb_y * 8 * frame->linesize[1] + t->mb_x * 8;
+ uint8_t *dest_cr = frame->data[2] + t->mb_y * 8 * frame->linesize[2] + t->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)) {
+
+ if (!(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 void tqi_calculate_qtable(MpegEncContext *s, int quant)
+static void tqi_calculate_qtable(TqiContext *t, int quant)
{
const int qscale = (215 - 2*quant)*5;
int i;
- s->intra_matrix[0] = (ff_inv_aanscales[0]*ff_mpeg1_default_intra_matrix[0])>>11;
+
+ t->intra_matrix[0] = (ff_inv_aanscales[0] * ff_mpeg1_default_intra_matrix[0]) >> 11;
for(i=1; i<64; i++)
- s->intra_matrix[i] = (ff_inv_aanscales[i]*ff_mpeg1_default_intra_matrix[i]*qscale + 32)>>14;
+ t->intra_matrix[i] = (ff_inv_aanscales[i] * ff_mpeg1_default_intra_matrix[i] * qscale + 32) >> 14;
}
static int tqi_decode_frame(AVCodecContext *avctx,
int buf_size = avpkt->size;
const uint8_t *buf_end = buf+buf_size;
TqiContext *t = avctx->priv_data;
- MpegEncContext *s = &t->s;
AVFrame *frame = data;
- int ret;
+ int ret, w, h;
+
+ t->avctx = avctx;
- s->width = AV_RL16(&buf[0]);
- s->height = AV_RL16(&buf[2]);
- tqi_calculate_qtable(s, buf[4]);
+ w = AV_RL16(&buf[0]);
+ h = AV_RL16(&buf[2]);
+ tqi_calculate_qtable(t, buf[4]);
buf += 8;
- ret = ff_set_dimensions(s->avctx, s->width, s->height);
+ ret = ff_set_dimensions(avctx, w, h);
if (ret < 0)
return ret;
return AVERROR(ENOMEM);
t->bsdsp.bswap_buf(t->bitstream_buf, (const uint32_t *) buf,
(buf_end - buf) / 4);
- init_get_bits(&s->gb, t->bitstream_buf, 8*(buf_end-buf));
-
- s->last_dc[0] = s->last_dc[1] = s->last_dc[2] = 0;
- for (s->mb_y=0; s->mb_y<(avctx->height+15)/16; s->mb_y++)
- for (s->mb_x=0; s->mb_x<(avctx->width+15)/16; s->mb_x++)
- {
- if (tqi_decode_mb(s, t->block) < 0)
- goto end;
- tqi_idct_put(t, frame, t->block);
+ init_get_bits(&t->gb, t->bitstream_buf, 8 * (buf_end - buf));
+
+ t->last_dc[0] =
+ t->last_dc[1] =
+ t->last_dc[2] = 0;
+ for (t->mb_y = 0; t->mb_y < (h + 15) / 16; t->mb_y++) {
+ for (t->mb_x = 0; t->mb_x < (w + 15) / 16; t->mb_x++) {
+ if (tqi_decode_mb(t, t->block) < 0)
+ goto end;
+ tqi_idct_put(avctx, frame, t->block);
+ }
}
end:
projects / ffmpeg / blobdiff