split rawvideo encoder and decoder in their own files

Originally committed as revision 9560 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 151 insertions, 0 deletions

diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c
new file mode 100644
index 0000000000..87fa295641
--- /dev/null
+++ b/libavcodec/rawdec.c
@@ -0,0 +1,151 @@
+/*
+ * Raw Video Decoder
+ * Copyright (c) 2001 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
+ */
+
+/**
+ * @file rawdec.c
+ * Raw Video Decoder
+ */
+
+#include "avcodec.h"
+#include "raw.h"
+
+typedef struct RawVideoContext {
+    unsigned char * buffer;  /* block of memory for holding one frame */
+    int             length;  /* number of bytes in buffer */
+    AVFrame pic;             ///< AVCodecContext.coded_frame
+} RawVideoContext;
+
+static const PixelFormatTag pixelFormatBpsAVI[] = {
+    { PIX_FMT_PAL8,    8 },
+    { PIX_FMT_RGB555, 15 },
+    { PIX_FMT_RGB555, 16 },
+    { PIX_FMT_BGR24,  24 },
+    { PIX_FMT_RGB32,  32 },
+    { -1, 0 },
+};
+
+static const PixelFormatTag pixelFormatBpsMOV[] = {
+    /* FIXME fix swscaler to support those */
+    /* http://developer.apple.com/documentation/QuickTime/QTFF/QTFFChap3/chapter_4_section_2.html */
+    { PIX_FMT_PAL8,      8 },
+    { PIX_FMT_BGR555,   16 },
+    { PIX_FMT_RGB24,    24 },
+    { PIX_FMT_BGR32_1,  32 },
+    { -1, 0 },
+};
+
+static int findPixelFormat(const PixelFormatTag *tags, unsigned int fourcc)
+{
+    while (tags->pix_fmt >= 0) {
+        if (tags->fourcc == fourcc)
+            return tags->pix_fmt;
+        tags++;
+    }
+    return PIX_FMT_YUV420P;
+}
+
+static int raw_init_decoder(AVCodecContext *avctx)
+{
+    RawVideoContext *context = avctx->priv_data;
+
+    if (avctx->codec_tag == MKTAG('r','a','w',' '))
+        avctx->pix_fmt = findPixelFormat(pixelFormatBpsMOV, avctx->bits_per_sample);
+    else if (avctx->codec_tag)
+        avctx->pix_fmt = findPixelFormat(ff_raw_pixelFormatTags, avctx->codec_tag);
+    else if (avctx->bits_per_sample)
+        avctx->pix_fmt = findPixelFormat(pixelFormatBpsAVI, avctx->bits_per_sample);
+
+    context->length = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
+    context->buffer = av_malloc(context->length);
+    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 void flip(AVCodecContext *avctx, AVPicture * picture){
+    if(!avctx->codec_tag && avctx->bits_per_sample && picture->linesize[2]==0){
+        picture->data[0] += picture->linesize[0] * (avctx->height-1);
+        picture->linesize[0] *= -1;
+    }
+}
+
+static int raw_decode(AVCodecContext *avctx,
+                            void *data, int *data_size,
+                            uint8_t *buf, int buf_size)
+{
+    RawVideoContext *context = avctx->priv_data;
+
+    AVFrame * frame = (AVFrame *) data;
+    AVPicture * picture = (AVPicture *) data;
+
+    frame->interlaced_frame = avctx->coded_frame->interlaced_frame;
+    frame->top_field_first = avctx->coded_frame->top_field_first;
+
+    if(buf_size < context->length - (avctx->pix_fmt==PIX_FMT_PAL8 ? 256*4 : 0))
+        return -1;
+
+    avpicture_fill(picture, buf, avctx->pix_fmt, avctx->width, avctx->height);
+    if(avctx->pix_fmt==PIX_FMT_PAL8 && buf_size < context->length){
+        frame->data[1]= context->buffer;
+    }
+    if (avctx->palctrl && avctx->palctrl->palette_changed) {
+        memcpy(frame->data[1], avctx->palctrl->palette, AVPALETTE_SIZE);
+        avctx->palctrl->palette_changed = 0;
+    }
+
+    flip(avctx, picture);
+
+    if (avctx->codec_tag == MKTAG('Y', 'V', '1', '2'))
+    {
+        // swap fields
+        unsigned char *tmp = picture->data[1];
+        picture->data[1] = picture->data[2];
+        picture->data[2] = tmp;
+    }
+
+    *data_size = sizeof(AVPicture);
+    return buf_size;
+}
+
+static int raw_close_decoder(AVCodecContext *avctx)
+{
+    RawVideoContext *context = avctx->priv_data;
+
+    av_freep(&context->buffer);
+    return 0;
+}
+
+AVCodec rawvideo_decoder = {
+    "rawvideo",
+    CODEC_TYPE_VIDEO,
+    CODEC_ID_RAWVIDEO,
+    sizeof(RawVideoContext),
+    raw_init_decoder,
+    NULL,
+    raw_close_decoder,
+    raw_decode,
+};