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authorAurelien Jacobs <aurel@gnuage.org>2007-07-09 16:26:11 +0000
committerAurelien Jacobs <aurel@gnuage.org>2007-07-09 16:26:11 +0000
commit3a763f0f0b8e18ed3999400e063ca425333c77fe (patch)
treefe99222c767581c7a5bc521cac58615e3fe737cd /libavcodec/rawdec.c
parent0d336e44db6ea55a83fae82f955976bfbc6e0565 (diff)
downloadffmpeg-3a763f0f0b8e18ed3999400e063ca425333c77fe.tar.gz
split rawvideo encoder and decoder in their own files
Originally committed as revision 9560 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/rawdec.c')
-rw-r--r--libavcodec/rawdec.c151
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,
+};