Release synfig_0_61_05

[synfig.git] / synfig-core / tags / synfig_0_61_05 / synfig-core / src / modules / mod_libavcodec / libavcodec / raw.c

diff --git a/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/raw.c b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/raw.c
new file mode 100644 (file)
index 0000000..ee4b6fd
--- /dev/null
+++ b/synfig-core/tags/synfig_0_61_05/synfig-core/src/modules/mod_libavcodec/libavcodec/raw.c
@@ -0,0 +1,176 @@
+/*
+ * Raw Video Codec
+ * Copyright (c) 2001 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+ 
+/**
+ * @file raw.c
+ * Raw Video Codec
+ */
+ 
+#include "avcodec.h"
+
+typedef struct RawVideoContext {
+    unsigned char * buffer;  /* block of memory for holding one frame */
+    unsigned char * p;       /* current position in buffer */
+    int             length;  /* number of bytes in buffer */
+    AVFrame pic;             ///< AVCodecContext.coded_frame
+} RawVideoContext;
+
+typedef struct PixleFormatTag {
+    int pix_fmt;
+    unsigned int fourcc;
+} PixelFormatTag;
+
+const PixelFormatTag pixelFormatTags[] = {
+    { PIX_FMT_YUV420P, MKTAG('I', '4', '2', '0') }, /* Planar formats */
+    { PIX_FMT_YUV420P, MKTAG('I', 'Y', 'U', 'V') },
+    { PIX_FMT_YUV410P, MKTAG('Y', 'U', 'V', '9') },
+    { PIX_FMT_YUV411P, MKTAG('Y', '4', '1', 'B') },
+    { PIX_FMT_YUV422P, MKTAG('Y', '4', '2', 'B') },
+    { PIX_FMT_GRAY8,   MKTAG('Y', '8', '0', '0') },
+    { PIX_FMT_GRAY8,   MKTAG(' ', ' ', 'Y', '8') },
+
+
+    { PIX_FMT_YUV422,  MKTAG('Y', '4', '2', '2') }, /* Packed formats */
+    { PIX_FMT_YUV422,  MKTAG('U', 'Y', 'V', 'Y') },
+    { PIX_FMT_GRAY8,   MKTAG('G', 'R', 'E', 'Y') },
+
+    { -1, 0 },
+};
+
+static int findPixelFormat(unsigned int fourcc)
+{
+    const PixelFormatTag * tags = pixelFormatTags;
+    while (tags->pix_fmt >= 0) {
+        if (tags->fourcc == fourcc)
+            return tags->pix_fmt;
+        tags++;
+    }
+    return PIX_FMT_YUV420P;
+}
+
+static unsigned int findFourCC(int fmt)
+{
+    const PixelFormatTag * tags = pixelFormatTags;
+    while (tags->pix_fmt >= 0) {
+        if (tags->pix_fmt == fmt)
+           return tags->fourcc;
+       tags++; 
+    }
+    return 0;
+}
+
+/* RAW Decoder Implementation */
+
+static int raw_init_decoder(AVCodecContext *avctx)
+{
+    RawVideoContext *context = avctx->priv_data;
+
+    if (avctx->codec_tag)
+        avctx->pix_fmt = findPixelFormat(avctx->codec_tag);
+    
+    context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+    context->buffer = av_malloc(context->length);
+    context->p      = context->buffer;
+    context->pic.pict_type = FF_I_TYPE;
+    context->pic.key_frame = 1;
+    
+    avctx->coded_frame= &context->pic;
+    
+    if (!context->buffer)
+        return -1;
+   
+    return 0;
+}
+
+static int raw_decode(AVCodecContext *avctx,
+                           void *data, int *data_size,
+                           uint8_t *buf, int buf_size)
+{
+    RawVideoContext *context = avctx->priv_data;
+    int bytesNeeded;
+
+    AVPicture * picture = (AVPicture *) data;
+
+    /* Early out without copy if packet size == frame size */
+    if (buf_size == context->length  &&  context->p == context->buffer) {
+        avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
+        *data_size = sizeof(AVPicture);
+        return buf_size;
+    }
+
+    bytesNeeded = context->length - (context->p - context->buffer);
+    if (buf_size < bytesNeeded) {
+        memcpy(context->p, buf, buf_size);
+        context->p += buf_size;
+        *data_size = 0;
+        return buf_size;
+    }
+
+    memcpy(context->p, buf, bytesNeeded);
+    context->p = context->buffer;
+    avpicture_fill(picture, context->buffer, avctx->pix_fmt, avctx->width, avctx->height);
+    *data_size = sizeof(AVPicture);
+    return bytesNeeded;
+}
+
+static int raw_close_decoder(AVCodecContext *avctx)
+{
+    RawVideoContext *context = avctx->priv_data;
+    
+    av_freep(&context->buffer);
+    return 0;
+}
+
+/* RAW Encoder Implementation */
+
+static int raw_init_encoder(AVCodecContext *avctx)
+{
+    avctx->coded_frame = (AVFrame *)avctx->priv_data;
+    avctx->coded_frame->pict_type = FF_I_TYPE;
+    avctx->coded_frame->key_frame = 1;
+    avctx->codec_tag = findFourCC(avctx->pix_fmt);
+    return 0;
+}
+
+static int raw_encode(AVCodecContext *avctx,
+                           unsigned char *frame, int buf_size, void *data)
+{
+    return avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
+                                               avctx->height, frame, buf_size);
+}
+
+AVCodec rawvideo_encoder = {
+    "rawvideo",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_RAWVIDEO,
+    sizeof(AVFrame),
+    raw_init_encoder,
+    raw_encode,
+};
+
+AVCodec rawvideo_decoder = {
+    "rawvideo",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_RAWVIDEO,
+    sizeof(RawVideoContext),
+    raw_init_decoder,
+    NULL,
+    raw_close_decoder,
+    raw_decode,
+};