diff ffmpeg/libavcodec/pamenc.c @ 10:6840f77b83aa

commit

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavcodec/pamenc.c	Sun Apr 21 10:55:35 2013 +0200
@@ -0,0 +1,143 @@
+/*
+ * 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 "internal.h"
+#include "pnm.h"
+
+
+static int pam_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                            const AVFrame *pict, int *got_packet)
+{
+    PNMContext *s     = avctx->priv_data;
+    AVFrame * const p = &s->picture;
+    int i, h, w, n, linesize, depth, maxval, ret;
+    const char *tuple_type;
+    uint8_t *ptr;
+
+    h = avctx->height;
+    w = avctx->width;
+    switch (avctx->pix_fmt) {
+    case AV_PIX_FMT_MONOBLACK:
+        n          = w;
+        depth      = 1;
+        maxval     = 1;
+        tuple_type = "BLACKANDWHITE";
+        break;
+    case AV_PIX_FMT_GRAY8:
+        n          = w;
+        depth      = 1;
+        maxval     = 255;
+        tuple_type = "GRAYSCALE";
+        break;
+    case AV_PIX_FMT_GRAY16BE:
+        n          = w * 2;
+        depth      = 1;
+        maxval     = 0xFFFF;
+        tuple_type = "GRAYSCALE";
+        break;
+    case AV_PIX_FMT_GRAY8A:
+        n          = w * 2;
+        depth      = 2;
+        maxval     = 255;
+        tuple_type = "GRAYSCALE_ALPHA";
+        break;
+    case AV_PIX_FMT_RGB24:
+        n          = w * 3;
+        depth      = 3;
+        maxval     = 255;
+        tuple_type = "RGB";
+        break;
+    case AV_PIX_FMT_RGBA:
+        n          = w * 4;
+        depth      = 4;
+        maxval     = 255;
+        tuple_type = "RGB_ALPHA";
+        break;
+    case AV_PIX_FMT_RGB48BE:
+        n          = w * 6;
+        depth      = 3;
+        maxval     = 0xFFFF;
+        tuple_type = "RGB";
+        break;
+    case AV_PIX_FMT_RGBA64BE:
+        n          = w * 8;
+        depth      = 4;
+        maxval     = 0xFFFF;
+        tuple_type = "RGB_ALPHA";
+        break;
+    default:
+        return -1;
+    }
+
+    if ((ret = ff_alloc_packet2(avctx, pkt, n*h + 200)) < 0)
+        return ret;
+
+    *p           = *pict;
+    p->pict_type = AV_PICTURE_TYPE_I;
+    p->key_frame = 1;
+
+    s->bytestream_start =
+    s->bytestream       = pkt->data;
+    s->bytestream_end   = pkt->data + pkt->size;
+
+    snprintf(s->bytestream, s->bytestream_end - s->bytestream,
+             "P7\nWIDTH %d\nHEIGHT %d\nDEPTH %d\nMAXVAL %d\nTUPLTYPE %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 == AV_PIX_FMT_MONOBLACK){
+        int j;
+        for (i = 0; i < h; i++) {
+            for (j = 0; j < w; j++)
+                *s->bytestream++ = ptr[j >> 3] >> (7 - j & 7) & 1;
+            ptr += linesize;
+        }
+    } else {
+        for (i = 0; i < h; i++) {
+            memcpy(s->bytestream, ptr, n);
+            s->bytestream += n;
+            ptr           += linesize;
+        }
+    }
+
+    pkt->size   = s->bytestream - s->bytestream_start;
+    pkt->flags |= AV_PKT_FLAG_KEY;
+    *got_packet = 1;
+    return 0;
+}
+
+
+AVCodec ff_pam_encoder = {
+    .name           = "pam",
+    .type           = AVMEDIA_TYPE_VIDEO,
+    .id             = AV_CODEC_ID_PAM,
+    .priv_data_size = sizeof(PNMContext),
+    .init           = ff_pnm_init,
+    .encode2        = pam_encode_frame,
+    .pix_fmts       = (const enum AVPixelFormat[]){
+        AV_PIX_FMT_RGB24, AV_PIX_FMT_RGBA, AV_PIX_FMT_RGB48BE, AV_PIX_FMT_RGBA64BE, AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_MONOBLACK, AV_PIX_FMT_NONE
+    },
+    .long_name      = NULL_IF_CONFIG_SMALL("PAM (Portable AnyMap) image"),
+};