making act segmenter

1 files changed, 334 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/asvdec.c b/ffmpeg/libavcodec/asvdec.c
new file mode 100644
index 0000000..7dca22b
--- /dev/null
+++ b/ffmpeg/libavcodec/asvdec.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright (c) 2003 Michael Niedermayer
+ *
+ * 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
+ * ASUS V1/V2 decoder.
+ */
+
+#include "libavutil/attributes.h"
+#include "libavutil/mem.h"
+
+#include "asv.h"
+#include "avcodec.h"
+#include "put_bits.h"
+#include "internal.h"
+#include "mathops.h"
+#include "mpeg12data.h"
+
+#define VLC_BITS 6
+#define ASV2_LEVEL_VLC_BITS 10
+
+static VLC ccp_vlc;
+static VLC level_vlc;
+static VLC dc_ccp_vlc;
+static VLC ac_ccp_vlc;
+static VLC asv2_level_vlc;
+
+static av_cold void init_vlcs(ASV1Context *a)
+{
+    static int done = 0;
+
+    if (!done) {
+        done = 1;
+
+        INIT_VLC_STATIC(&ccp_vlc, VLC_BITS, 17,
+                        &ff_asv_ccp_tab[0][1], 2, 1,
+                        &ff_asv_ccp_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&dc_ccp_vlc, VLC_BITS, 8,
+                        &ff_asv_dc_ccp_tab[0][1], 2, 1,
+                        &ff_asv_dc_ccp_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&ac_ccp_vlc, VLC_BITS, 16,
+                        &ff_asv_ac_ccp_tab[0][1], 2, 1,
+                        &ff_asv_ac_ccp_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&level_vlc,  VLC_BITS, 7,
+                        &ff_asv_level_tab[0][1], 2, 1,
+                        &ff_asv_level_tab[0][0], 2, 1, 64);
+        INIT_VLC_STATIC(&asv2_level_vlc, ASV2_LEVEL_VLC_BITS, 63,
+                        &ff_asv2_level_tab[0][1], 2, 1,
+                        &ff_asv2_level_tab[0][0], 2, 1, 1024);
+    }
+}
+
+//FIXME write a reversed bitstream reader to avoid the double reverse
+static inline int asv2_get_bits(GetBitContext *gb, int n)
+{
+    return ff_reverse[get_bits(gb, n) << (8-n)];
+}
+
+static inline int asv1_get_level(GetBitContext *gb)
+{
+    int code = get_vlc2(gb, level_vlc.table, VLC_BITS, 1);
+
+    if (code == 3)
+        return get_sbits(gb, 8);
+    else
+        return code - 3;
+}
+
+static inline int asv2_get_level(GetBitContext *gb)
+{
+    int code = get_vlc2(gb, asv2_level_vlc.table, ASV2_LEVEL_VLC_BITS, 1);
+
+    if (code == 31)
+        return (int8_t)asv2_get_bits(gb, 8);
+    else
+        return code - 31;
+}
+
+static inline int asv1_decode_block(ASV1Context *a, int16_t block[64])
+{
+    int i;
+
+    block[0] = 8 * get_bits(&a->gb, 8);
+
+    for (i = 0; i < 11; i++) {
+        const int ccp = get_vlc2(&a->gb, ccp_vlc.table, VLC_BITS, 1);
+
+        if (ccp) {
+            if (ccp == 16)
+                break;
+            if (ccp < 0 || i >= 10) {
+                av_log(a->avctx, AV_LOG_ERROR, "coded coeff pattern damaged\n");
+                return AVERROR_INVALIDDATA;
+            }
+
+            if (ccp & 8)
+                block[a->scantable.permutated[4 * i + 0]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 0]) >> 4;
+            if (ccp & 4)
+                block[a->scantable.permutated[4 * i + 1]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 1]) >> 4;
+            if (ccp & 2)
+                block[a->scantable.permutated[4 * i + 2]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 2]) >> 4;
+            if (ccp & 1)
+                block[a->scantable.permutated[4 * i + 3]] = (asv1_get_level(&a->gb) * a->intra_matrix[4 * i + 3]) >> 4;
+        }
+    }
+
+    return 0;
+}
+
+static inline int asv2_decode_block(ASV1Context *a, int16_t block[64])
+{
+    int i, count, ccp;
+
+    count = asv2_get_bits(&a->gb, 4);
+
+    block[0] = 8 * asv2_get_bits(&a->gb, 8);
+
+    ccp = get_vlc2(&a->gb, dc_ccp_vlc.table, VLC_BITS, 1);
+    if (ccp) {
+        if (ccp & 4)
+            block[a->scantable.permutated[1]] = (asv2_get_level(&a->gb) * a->intra_matrix[1]) >> 4;
+        if (ccp & 2)
+            block[a->scantable.permutated[2]] = (asv2_get_level(&a->gb) * a->intra_matrix[2]) >> 4;
+        if (ccp & 1)
+            block[a->scantable.permutated[3]] = (asv2_get_level(&a->gb) * a->intra_matrix[3]) >> 4;
+    }
+
+    for (i = 1; i < count + 1; i++) {
+        const int ccp = get_vlc2(&a->gb, ac_ccp_vlc.table, VLC_BITS, 1);
+
+        if (ccp) {
+            if (ccp & 8)
+                block[a->scantable.permutated[4*i + 0]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 0]) >> 4;
+            if (ccp & 4)
+                block[a->scantable.permutated[4*i + 1]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 1]) >> 4;
+            if (ccp & 2)
+                block[a->scantable.permutated[4*i + 2]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 2]) >> 4;
+            if (ccp & 1)
+                block[a->scantable.permutated[4*i + 3]] = (asv2_get_level(&a->gb) * a->intra_matrix[4*i + 3]) >> 4;
+        }
+    }
+
+    return 0;
+}
+
+static inline int decode_mb(ASV1Context *a, int16_t block[6][64])
+{
+    int i;
+
+    a->dsp.clear_blocks(block[0]);
+
+    if (a->avctx->codec_id == AV_CODEC_ID_ASV1) {
+        for (i = 0; i < 6; i++) {
+            if (asv1_decode_block(a, block[i]) < 0)
+                return -1;
+        }
+    } else {
+        for (i = 0; i < 6; i++) {
+            if (asv2_decode_block(a, block[i]) < 0)
+                return -1;
+        }
+    }
+    return 0;
+}
+
+static inline void idct_put(ASV1Context *a, AVFrame *frame, int mb_x, int mb_y)
+{
+    int16_t (*block)[64] = a->block;
+    int 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;
+
+    a->dsp.idct_put(dest_y                 , linesize, block[0]);
+    a->dsp.idct_put(dest_y              + 8, linesize, block[1]);
+    a->dsp.idct_put(dest_y + 8*linesize    , linesize, block[2]);
+    a->dsp.idct_put(dest_y + 8*linesize + 8, linesize, block[3]);
+
+    if (!(a->avctx->flags&CODEC_FLAG_GRAY)) {
+        a->dsp.idct_put(dest_cb, frame->linesize[1], block[4]);
+        a->dsp.idct_put(dest_cr, frame->linesize[2], block[5]);
+    }
+}
+
+static int decode_frame(AVCodecContext *avctx,
+                        void *data, int *got_frame,
+                        AVPacket *avpkt)
+{
+    ASV1Context * const a = avctx->priv_data;
+    const uint8_t *buf    = avpkt->data;
+    int buf_size          = avpkt->size;
+    AVFrame * const p     = data;
+    int mb_x, mb_y, ret;
+
+    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
+        return ret;
+    p->pict_type = AV_PICTURE_TYPE_I;
+    p->key_frame = 1;
+
+    av_fast_padded_malloc(&a->bitstream_buffer, &a->bitstream_buffer_size,
+                          buf_size);
+    if (!a->bitstream_buffer)
+        return AVERROR(ENOMEM);
+
+    if (avctx->codec_id == AV_CODEC_ID_ASV1)
+        a->dsp.bswap_buf((uint32_t*)a->bitstream_buffer, (const uint32_t*)buf, buf_size/4);
+    else {
+        int i;
+        for (i = 0; i < buf_size; i++)
+            a->bitstream_buffer[i] = ff_reverse[buf[i]];
+    }
+
+    init_get_bits(&a->gb, a->bitstream_buffer, buf_size*8);
+
+    for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
+        for (mb_x = 0; mb_x < a->mb_width2; mb_x++) {
+            if ((ret = decode_mb(a, a->block)) < 0)
+                return ret;
+
+            idct_put(a, p, mb_x, mb_y);
+        }
+    }
+
+    if (a->mb_width2 != a->mb_width) {
+        mb_x = a->mb_width2;
+        for (mb_y = 0; mb_y < a->mb_height2; mb_y++) {
+            if ((ret = decode_mb(a, a->block)) < 0)
+                return ret;
+
+            idct_put(a, p, mb_x, mb_y);
+        }
+    }
+
+    if (a->mb_height2 != a->mb_height) {
+        mb_y = a->mb_height2;
+        for (mb_x = 0; mb_x < a->mb_width; mb_x++) {
+            if ((ret = decode_mb(a, a->block)) < 0)
+                return ret;
+
+            idct_put(a, p, mb_x, mb_y);
+        }
+    }
+
+    *got_frame = 1;
+
+    emms_c();
+
+    return (get_bits_count(&a->gb) + 31) / 32 * 4;
+}
+
+static av_cold int decode_init(AVCodecContext *avctx)
+{
+    ASV1Context * const a = avctx->priv_data;
+    const int scale       = avctx->codec_id == AV_CODEC_ID_ASV1 ? 1 : 2;
+    int i;
+
+    ff_asv_common_init(avctx);
+    init_vlcs(a);
+    ff_init_scantable(a->dsp.idct_permutation, &a->scantable, ff_asv_scantab);
+    avctx->pix_fmt = AV_PIX_FMT_YUV420P;
+
+    if (avctx->extradata_size < 1 || (a->inv_qscale = avctx->extradata[0]) == 0) {
+        av_log(avctx, AV_LOG_ERROR, "illegal qscale 0\n");
+        if (avctx->codec_id == AV_CODEC_ID_ASV1)
+            a->inv_qscale = 6;
+        else
+            a->inv_qscale = 10;
+    }
+
+    for (i = 0; i < 64; i++) {
+        int index = ff_asv_scantab[i];
+
+        a->intra_matrix[i] = 64 * scale * ff_mpeg1_default_intra_matrix[index] / a->inv_qscale;
+    }
+
+    return 0;
+}
+
+static av_cold int decode_end(AVCodecContext *avctx)
+{
+    ASV1Context * const a = avctx->priv_data;
+
+    av_freep(&a->bitstream_buffer);
+    a->bitstream_buffer_size = 0;
+
+    return 0;
+}
+
+#if CONFIG_ASV1_DECODER
+AVCodec ff_asv1_decoder = {
+    .name           = "asv1",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_ASV1,
+    .priv_data_size = sizeof(ASV1Context),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V1"),
+};
+#endif
+
+#if CONFIG_ASV2_DECODER
+AVCodec ff_asv2_decoder = {
+    .name           = "asv2",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_ASV2,
+    .priv_data_size = sizeof(ASV1Context),
+    .init           = decode_init,
+    .close          = decode_end,
+    .decode         = decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("ASUS V2"),
+};
+#endif
+