adding ffmpeg specific version

1 files changed, 290 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/pnmdec.c b/ffmpeg1/libavcodec/pnmdec.c
new file mode 100644
index 0000000..d0c7295
--- /dev/null
+++ b/ffmpeg1/libavcodec/pnmdec.c
@@ -0,0 +1,290 @@
+/*
+ * PNM image format
+ * Copyright (c) 2002, 2003 Fabrice Bellard
+ *
+ * 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
+ */
+
+#include "avcodec.h"
+#include "internal.h"
+#include "put_bits.h"
+#include "pnm.h"
+
+
+static int pnm_decode_frame(AVCodecContext *avctx, void *data,
+                            int *got_frame, AVPacket *avpkt)
+{
+    const uint8_t *buf   = avpkt->data;
+    int buf_size         = avpkt->size;
+    PNMContext * const s = avctx->priv_data;
+    AVFrame * const p    = data;
+    int i, j, n, linesize, h, upgrade = 0, is_mono = 0;
+    unsigned char *ptr;
+    int components, sample_len, ret;
+
+    s->bytestream_start =
+    s->bytestream       = (uint8_t *)buf;
+    s->bytestream_end   = (uint8_t *)buf + buf_size;
+
+    if ((ret = ff_pnm_decode_header(avctx, s)) < 0)
+        return ret;
+
+    if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
+        return ret;
+    p->pict_type = AV_PICTURE_TYPE_I;
+    p->key_frame = 1;
+
+    switch (avctx->pix_fmt) {
+    default:
+        return AVERROR(EINVAL);
+    case AV_PIX_FMT_RGBA64BE:
+        n = avctx->width * 8;
+        components=4;
+        sample_len=16;
+        goto do_read;
+    case AV_PIX_FMT_RGB48BE:
+        n = avctx->width * 6;
+        components=3;
+        sample_len=16;
+        goto do_read;
+    case AV_PIX_FMT_RGBA:
+        n = avctx->width * 4;
+        components=4;
+        sample_len=8;
+        goto do_read;
+    case AV_PIX_FMT_RGB24:
+        n = avctx->width * 3;
+        components=3;
+        sample_len=8;
+        goto do_read;
+    case AV_PIX_FMT_GRAY8:
+        n = avctx->width;
+        components=1;
+        sample_len=8;
+        if (s->maxval < 255)
+            upgrade = 1;
+        goto do_read;
+    case AV_PIX_FMT_GRAY8A:
+        n = avctx->width * 2;
+        components=2;
+        sample_len=8;
+        goto do_read;
+    case AV_PIX_FMT_GRAY16BE:
+    case AV_PIX_FMT_GRAY16LE:
+        n = avctx->width * 2;
+        components=1;
+        sample_len=16;
+        if (s->maxval < 65535)
+            upgrade = 2;
+        goto do_read;
+    case AV_PIX_FMT_MONOWHITE:
+    case AV_PIX_FMT_MONOBLACK:
+        n = (avctx->width + 7) >> 3;
+        components=1;
+        sample_len=1;
+        is_mono = 1;
+    do_read:
+        ptr      = p->data[0];
+        linesize = p->linesize[0];
+        if (s->bytestream + n * avctx->height > s->bytestream_end)
+            return AVERROR_INVALIDDATA;
+        if(s->type < 4 || (is_mono && s->type==7)){
+            for (i=0; i<avctx->height; i++) {
+                PutBitContext pb;
+                init_put_bits(&pb, ptr, linesize);
+                for(j=0; j<avctx->width * components; j++){
+                    unsigned int c=0;
+                    int v=0;
+                    if(s->type < 4)
+                    while(s->bytestream < s->bytestream_end && (*s->bytestream < '0' || *s->bytestream > '9' ))
+                        s->bytestream++;
+                    if(s->bytestream >= s->bytestream_end)
+                        return AVERROR_INVALIDDATA;
+                    if (is_mono) {
+                        /* read a single digit */
+                        v = (*s->bytestream++)&1;
+                    } else {
+                        /* read a sequence of digits */
+                        do {
+                            v = 10*v + c;
+                            c = (*s->bytestream++) - '0';
+                        } while (c <= 9);
+                    }
+                    put_bits(&pb, sample_len, (((1<<sample_len)-1)*v + (s->maxval>>1))/s->maxval);
+                }
+                flush_put_bits(&pb);
+                ptr+= linesize;
+            }
+        }else{
+        for (i = 0; i < avctx->height; i++) {
+            if (!upgrade)
+                memcpy(ptr, s->bytestream, n);
+            else if (upgrade == 1) {
+                unsigned int j, f = (255 * 128 + s->maxval / 2) / s->maxval;
+                for (j = 0; j < n; j++)
+                    ptr[j] = (s->bytestream[j] * f + 64) >> 7;
+            } else if (upgrade == 2) {
+                unsigned int j, v, f = (65535 * 32768 + s->maxval / 2) / s->maxval;
+                for (j = 0; j < n / 2; j++) {
+                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
+                    ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
+                }
+            }
+            s->bytestream += n;
+            ptr           += linesize;
+        }
+        }
+        break;
+    case AV_PIX_FMT_YUV420P:
+    case AV_PIX_FMT_YUV420P9BE:
+    case AV_PIX_FMT_YUV420P10BE:
+        {
+            unsigned char *ptr1, *ptr2;
+
+            n        = avctx->width;
+            ptr      = p->data[0];
+            linesize = p->linesize[0];
+            if (s->maxval >= 256)
+                n *= 2;
+            if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
+                return AVERROR_INVALIDDATA;
+            for (i = 0; i < avctx->height; i++) {
+                memcpy(ptr, s->bytestream, n);
+                s->bytestream += n;
+                ptr           += linesize;
+            }
+            ptr1 = p->data[1];
+            ptr2 = p->data[2];
+            n >>= 1;
+            h = avctx->height >> 1;
+            for (i = 0; i < h; i++) {
+                memcpy(ptr1, s->bytestream, n);
+                s->bytestream += n;
+                memcpy(ptr2, s->bytestream, n);
+                s->bytestream += n;
+                ptr1 += p->linesize[1];
+                ptr2 += p->linesize[2];
+            }
+        }
+        break;
+    case AV_PIX_FMT_YUV420P16:
+        {
+            uint16_t *ptr1, *ptr2;
+            const int f = (65535 * 32768 + s->maxval / 2) / s->maxval;
+            unsigned int j, v;
+
+            n        = avctx->width * 2;
+            ptr      = p->data[0];
+            linesize = p->linesize[0];
+            if (s->bytestream + n * avctx->height * 3 / 2 > s->bytestream_end)
+                return AVERROR_INVALIDDATA;
+            for (i = 0; i < avctx->height; i++) {
+                for (j = 0; j < n / 2; j++) {
+                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
+                    ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
+                }
+                s->bytestream += n;
+                ptr           += linesize;
+            }
+            ptr1 = (uint16_t*)p->data[1];
+            ptr2 = (uint16_t*)p->data[2];
+            n >>= 1;
+            h = avctx->height >> 1;
+            for (i = 0; i < h; i++) {
+                for (j = 0; j < n / 2; j++) {
+                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
+                    ptr1[j] = (v * f + 16384) >> 15;
+                }
+                s->bytestream += n;
+
+                for (j = 0; j < n / 2; j++) {
+                    v = av_be2ne16(((uint16_t *)s->bytestream)[j]);
+                    ptr2[j] = (v * f + 16384) >> 15;
+                }
+                s->bytestream += n;
+
+                ptr1 += p->linesize[1] / 2;
+                ptr2 += p->linesize[2] / 2;
+            }
+        }
+        break;
+    }
+    *got_frame = 1;
+
+    return s->bytestream - s->bytestream_start;
+}
+
+
+#if CONFIG_PGM_DECODER
+AVCodec ff_pgm_decoder = {
+    .name           = "pgm",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_PGM,
+    .priv_data_size = sizeof(PNMContext),
+    .decode         = pnm_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("PGM (Portable GrayMap) image"),
+};
+#endif
+
+#if CONFIG_PGMYUV_DECODER
+AVCodec ff_pgmyuv_decoder = {
+    .name           = "pgmyuv",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_PGMYUV,
+    .priv_data_size = sizeof(PNMContext),
+    .decode         = pnm_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("PGMYUV (Portable GrayMap YUV) image"),
+};
+#endif
+
+#if CONFIG_PPM_DECODER
+AVCodec ff_ppm_decoder = {
+    .name           = "ppm",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_PPM,
+    .priv_data_size = sizeof(PNMContext),
+    .decode         = pnm_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("PPM (Portable PixelMap) image"),
+};
+#endif
+
+#if CONFIG_PBM_DECODER
+AVCodec ff_pbm_decoder = {
+    .name           = "pbm",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_PBM,
+    .priv_data_size = sizeof(PNMContext),
+    .decode         = pnm_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("PBM (Portable BitMap) image"),
+};
+#endif
+
+#if CONFIG_PAM_DECODER
+AVCodec ff_pam_decoder = {
+    .name           = "pam",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_PAM,
+    .priv_data_size = sizeof(PNMContext),
+    .decode         = pnm_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
+};
+#endif