Split PAM encoder off into its own file.

Originally committed as revision 20395 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 120 insertions, 0 deletions

diff --git a/libavcodec/pamenc.c b/libavcodec/pamenc.c
new file mode 100644
index 0000000000..1239521a7a
--- /dev/null
+++ b/libavcodec/pamenc.c
@@ -0,0 +1,120 @@
+/*
+ * PAM 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 "bytestream.h"
+#include "pnm.h"
+
+
+static int pam_encode_frame(AVCodecContext *avctx, unsigned char *outbuf,
+                            int buf_size, void *data)
+{
+    PNMContext *s     = avctx->priv_data;
+    AVFrame *pict     = data;
+    AVFrame * const p = (AVFrame*)&s->picture;
+    int i, h, w, n, linesize, depth, maxval;
+    const char *tuple_type;
+    uint8_t *ptr;
+
+    if (buf_size < avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height) + 200) {
+        av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n");
+        return -1;
+    }
+
+    *p           = *pict;
+    p->pict_type = FF_I_TYPE;
+    p->key_frame = 1;
+
+    s->bytestream_start =
+    s->bytestream       = outbuf;
+    s->bytestream_end   = outbuf+buf_size;
+
+    h = avctx->height;
+    w = avctx->width;
+    switch (avctx->pix_fmt) {
+    case PIX_FMT_MONOWHITE:
+        n          = (w + 7) >> 3;
+        depth      = 1;
+        maxval     = 1;
+        tuple_type = "BLACKANDWHITE";
+        break;
+    case PIX_FMT_GRAY8:
+        n          = w;
+        depth      = 1;
+        maxval     = 255;
+        tuple_type = "GRAYSCALE";
+        break;
+    case PIX_FMT_RGB24:
+        n          = w * 3;
+        depth      = 3;
+        maxval     = 255;
+        tuple_type = "RGB";
+        break;
+    case PIX_FMT_RGB32:
+        n          = w * 4;
+        depth      = 4;
+        maxval     = 255;
+        tuple_type = "RGB_ALPHA";
+        break;
+    default:
+        return -1;
+    }
+    snprintf(s->bytestream, s->bytestream_end - s->bytestream,
+             "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLETYPE %s\nENDHDR\n",
+             w, h, depth, maxval, tuple_type);
+    s->bytestream += strlen(s->bytestream);
+
+    ptr      = p->data[0];
+    linesize = p->linesize[0];
+
+    if (avctx->pix_fmt == PIX_FMT_RGB32) {
+        int j;
+        unsigned int v;
+
+        for (i = 0; i < h; i++) {
+            for (j = 0; j < w; j++) {
+                v = ((uint32_t *)ptr)[j];
+                bytestream_put_be24(&s->bytestream, v);
+                *s->bytestream++ = v >> 24;
+            }
+            ptr += linesize;
+        }
+    } else {
+        for (i = 0; i < h; i++) {
+            memcpy(s->bytestream, ptr, n);
+            s->bytestream += n;
+            ptr           += linesize;
+        }
+    }
+    return s->bytestream - s->bytestream_start;
+}
+
+
+AVCodec pam_encoder = {
+    "pam",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_PAM,
+    sizeof(PNMContext),
+    ff_pnm_init,
+    pam_encode_frame,
+    .pix_fmts  = (const enum PixelFormat[]){PIX_FMT_RGB24, PIX_FMT_RGB32, PIX_FMT_GRAY8, PIX_FMT_MONOWHITE, PIX_FMT_NONE},
+    .long_name = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
+};