ffmpeg-2.1.1: move directory

git-svn-id: svn://kolibrios.org@6148 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/ffmpeg/ffmpeg-2.1/libavcodec/eatqi.c

@@ -0,0 +1,158 @@
+/*
+ * Electronic Arts TQI Video Decoder
+ * Copyright (c) 2007-2009 Peter Ross <pross@xvid.org>
+ *
+ * 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 St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/**
+ * @file
+ * Electronic Arts TQI Video Decoder
+ * @author Peter Ross <pross@xvid.org>
+ * @see http://wiki.multimedia.cx/index.php?title=Electronic_Arts_TQI
+ */
+
+#include "avcodec.h"
+#include "get_bits.h"
+#include "aandcttab.h"
+#include "eaidct.h"
+#include "internal.h"
+#include "mpeg12.h"
+#include "mpegvideo.h"
+
+typedef struct TqiContext {
+    MpegEncContext s;
+    void *bitstream_buf;
+    unsigned int bitstream_buf_size;
+    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_dsputil_init(&s->dsp, avctx);
+    ff_init_scantable_permutation(s->dsp.idct_permutation, FF_NO_IDCT_PERM);
+    ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable, ff_zigzag_direct);
+    s->qscale = 1;
+    avctx->time_base = (AVRational){1, 15};
+    avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+    ff_mpeg12_init_vlcs();
+    return 0;
+}
+
+static int tqi_decode_mb(MpegEncContext *s, int16_t (*block)[64])
+{
+    int n;
+    s->dsp.clear_blocks(block[0]);
+    for (n=0; n<6; n++)
+        if (ff_mpeg1_decode_block_intra(s, block[n], n) < 0)
+            return -1;
+
+    return 0;
+}
+
+static inline void tqi_idct_put(TqiContext *t, AVFrame *frame, int16_t (*block)[64])
+{
+    MpegEncContext *s = &t->s;
+    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;
+
+    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&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)
+{
+    const int qscale = (215 - 2*quant)*5;
+    int i;
+    s->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;
+}
+
+static int tqi_decode_frame(AVCodecContext *avctx,
+                            void *data, int *got_frame,
+                            AVPacket *avpkt)
+{
+    const uint8_t *buf = avpkt->data;
+    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;
+
+    s->width  = AV_RL16(&buf[0]);
+    s->height = AV_RL16(&buf[2]);
+    tqi_calculate_qtable(s, buf[4]);
+    buf += 8;
+
+    if (s->avctx->width!=s->width || s->avctx->height!=s->height)
+        avcodec_set_dimensions(s->avctx, s->width, s->height);
+
+    if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
+        return ret;
+
+    av_fast_padded_malloc(&t->bitstream_buf, &t->bitstream_buf_size,
+                          buf_end - buf);
+    if (!t->bitstream_buf)
+        return AVERROR(ENOMEM);
+    s->dsp.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);
+    }
+    end:
+
+    *got_frame = 1;
+    return buf_size;
+}
+
+static av_cold int tqi_decode_end(AVCodecContext *avctx)
+{
+    TqiContext *t = avctx->priv_data;
+    av_free(t->bitstream_buf);
+    return 0;
+}
+
+AVCodec ff_eatqi_decoder = {
+    .name           = "eatqi",
+    .long_name      = NULL_IF_CONFIG_SMALL("Electronic Arts TQI Video"),
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_TQI,
+    .priv_data_size = sizeof(TqiContext),
+    .init           = tqi_decode_init,
+    .close          = tqi_decode_end,
+    .decode         = tqi_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+};