move sp5x decoder in its own file

Originally committed as revision 9071 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 198 insertions, 0 deletions

diff --git a/libavcodec/sp5xdec.c b/libavcodec/sp5xdec.c
new file mode 100644
index 0000000000..9553943bbd
--- /dev/null
+++ b/libavcodec/sp5xdec.c
@@ -0,0 +1,198 @@
+/*
+ * Sunplus JPEG decoder (SP5X)
+ * Copyright (c) 2003 Alex Beregszaszi
+ *
+ * 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 sp5xdec.c
+ * Sunplus JPEG decoder (SP5X).
+ */
+
+#include "avcodec.h"
+#include "mjpeg.h"
+#include "mjpegdec.h"
+#include "sp5x.h"
+
+
+static int sp5x_decode_frame(AVCodecContext *avctx,
+                              void *data, int *data_size,
+                              uint8_t *buf, int buf_size)
+{
+#if 0
+    MJpegDecodeContext *s = avctx->priv_data;
+#endif
+    const int qscale = 5;
+    uint8_t *buf_ptr, *buf_end, *recoded;
+    int i = 0, j = 0;
+
+    if (!avctx->width || !avctx->height)
+        return -1;
+
+    buf_ptr = buf;
+    buf_end = buf + buf_size;
+
+#if 1
+    recoded = av_mallocz(buf_size + 1024);
+    if (!recoded)
+        return -1;
+
+    /* SOI */
+    recoded[j++] = 0xFF;
+    recoded[j++] = 0xD8;
+
+    memcpy(recoded+j, &sp5x_data_dqt[0], sizeof(sp5x_data_dqt));
+    memcpy(recoded+j+5, &sp5x_quant_table[qscale * 2], 64);
+    memcpy(recoded+j+70, &sp5x_quant_table[(qscale * 2) + 1], 64);
+    j += sizeof(sp5x_data_dqt);
+
+    memcpy(recoded+j, &sp5x_data_dht[0], sizeof(sp5x_data_dht));
+    j += sizeof(sp5x_data_dht);
+
+    memcpy(recoded+j, &sp5x_data_sof[0], sizeof(sp5x_data_sof));
+    recoded[j+5] = (avctx->coded_height >> 8) & 0xFF;
+    recoded[j+6] = avctx->coded_height & 0xFF;
+    recoded[j+7] = (avctx->coded_width >> 8) & 0xFF;
+    recoded[j+8] = avctx->coded_width & 0xFF;
+    j += sizeof(sp5x_data_sof);
+
+    memcpy(recoded+j, &sp5x_data_sos[0], sizeof(sp5x_data_sos));
+    j += sizeof(sp5x_data_sos);
+
+    for (i = 14; i < buf_size && j < buf_size+1024-2; i++)
+    {
+        recoded[j++] = buf[i];
+        if (buf[i] == 0xff)
+            recoded[j++] = 0;
+    }
+
+    /* EOI */
+    recoded[j++] = 0xFF;
+    recoded[j++] = 0xD9;
+
+    i = ff_mjpeg_decode_frame(avctx, data, data_size, recoded, j);
+
+    av_free(recoded);
+
+#else
+    /* SOF */
+    s->bits = 8;
+    s->width  = avctx->coded_width;
+    s->height = avctx->coded_height;
+    s->nb_components = 3;
+    s->component_id[0] = 0;
+    s->h_count[0] = 2;
+    s->v_count[0] = 2;
+    s->quant_index[0] = 0;
+    s->component_id[1] = 1;
+    s->h_count[1] = 1;
+    s->v_count[1] = 1;
+    s->quant_index[1] = 1;
+    s->component_id[2] = 2;
+    s->h_count[2] = 1;
+    s->v_count[2] = 1;
+    s->quant_index[2] = 1;
+    s->h_max = 2;
+    s->v_max = 2;
+
+    s->qscale_table = av_mallocz((s->width+15)/16);
+    avctx->pix_fmt = s->cs_itu601 ? PIX_FMT_YUV420P : PIX_FMT_YUVJ420;
+    s->interlaced = 0;
+
+    s->picture.reference = 0;
+    if (avctx->get_buffer(avctx, &s->picture) < 0)
+    {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return -1;
+    }
+
+    s->picture.pict_type = I_TYPE;
+    s->picture.key_frame = 1;
+
+    for (i = 0; i < 3; i++)
+        s->linesize[i] = s->picture.linesize[i] << s->interlaced;
+
+    /* DQT */
+    for (i = 0; i < 64; i++)
+    {
+        j = s->scantable.permutated[i];
+        s->quant_matrixes[0][j] = sp5x_quant_table[(qscale * 2) + i];
+    }
+    s->qscale[0] = FFMAX(
+        s->quant_matrixes[0][s->scantable.permutated[1]],
+        s->quant_matrixes[0][s->scantable.permutated[8]]) >> 1;
+
+    for (i = 0; i < 64; i++)
+    {
+        j = s->scantable.permutated[i];
+        s->quant_matrixes[1][j] = sp5x_quant_table[(qscale * 2) + 1 + i];
+    }
+    s->qscale[1] = FFMAX(
+        s->quant_matrixes[1][s->scantable.permutated[1]],
+        s->quant_matrixes[1][s->scantable.permutated[8]]) >> 1;
+
+    /* DHT */
+
+    /* SOS */
+    s->comp_index[0] = 0;
+    s->nb_blocks[0] = s->h_count[0] * s->v_count[0];
+    s->h_scount[0] = s->h_count[0];
+    s->v_scount[0] = s->v_count[0];
+    s->dc_index[0] = 0;
+    s->ac_index[0] = 0;
+
+    s->comp_index[1] = 1;
+    s->nb_blocks[1] = s->h_count[1] * s->v_count[1];
+    s->h_scount[1] = s->h_count[1];
+    s->v_scount[1] = s->v_count[1];
+    s->dc_index[1] = 1;
+    s->ac_index[1] = 1;
+
+    s->comp_index[2] = 2;
+    s->nb_blocks[2] = s->h_count[2] * s->v_count[2];
+    s->h_scount[2] = s->h_count[2];
+    s->v_scount[2] = s->v_count[2];
+    s->dc_index[2] = 1;
+    s->ac_index[2] = 1;
+
+    for (i = 0; i < 3; i++)
+        s->last_dc[i] = 1024;
+
+    s->mb_width = (s->width * s->h_max * 8 -1) / (s->h_max * 8);
+    s->mb_height = (s->height * s->v_max * 8 -1) / (s->v_max * 8);
+
+    init_get_bits(&s->gb, buf+14, (buf_size-14)*8);
+
+    return mjpeg_decode_scan(s);
+#endif
+
+    return i;
+}
+
+AVCodec sp5x_decoder = {
+    "sp5x",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_SP5X,
+    sizeof(MJpegDecodeContext),
+    ff_mjpeg_decode_init,
+    NULL,
+    ff_mjpeg_decode_end,
+    sp5x_decode_frame,
+    CODEC_CAP_DR1,
+    NULL
+};