diff ffmpeg/libavformat/rawvideodec.c @ 11:f445c3017523

new files

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ffmpeg/libavformat/rawvideodec.c	Sun Apr 21 11:16:23 2013 +0200
@@ -0,0 +1,115 @@
+/*
+ * RAW video demuxer
+ * 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
+ */
+
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+#include "internal.h"
+#include "avformat.h"
+
+typedef struct RawVideoDemuxerContext {
+    const AVClass *class;     /**< Class for private options. */
+    int width, height;        /**< Integers describing video size, set by a private option. */
+    char *pixel_format;       /**< Set by a private option. */
+    AVRational framerate;     /**< AVRational describing framerate, set by a private option. */
+} RawVideoDemuxerContext;
+
+
+static int rawvideo_read_header(AVFormatContext *ctx)
+{
+    RawVideoDemuxerContext *s = ctx->priv_data;
+    enum AVPixelFormat pix_fmt;
+    AVStream *st;
+
+    st = avformat_new_stream(ctx, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
+
+    st->codec->codec_id = ctx->iformat->raw_codec_id;
+
+    if ((pix_fmt = av_get_pix_fmt(s->pixel_format)) == AV_PIX_FMT_NONE) {
+        av_log(ctx, AV_LOG_ERROR, "No such pixel format: %s.\n",
+               s->pixel_format);
+        return AVERROR(EINVAL);
+    }
+
+    avpriv_set_pts_info(st, 64, s->framerate.den, s->framerate.num);
+
+    st->codec->width  = s->width;
+    st->codec->height = s->height;
+    st->codec->pix_fmt = pix_fmt;
+    st->codec->bit_rate = av_rescale_q(avpicture_get_size(st->codec->pix_fmt, s->width, s->height),
+                                       (AVRational){8,1}, st->time_base);
+
+    return 0;
+}
+
+
+static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+    int packet_size, ret, width, height;
+    AVStream *st = s->streams[0];
+
+    width = st->codec->width;
+    height = st->codec->height;
+
+    packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
+    if (packet_size < 0)
+        return -1;
+
+    ret = av_get_packet(s->pb, pkt, packet_size);
+    pkt->pts = pkt->dts = pkt->pos / packet_size;
+
+    pkt->stream_index = 0;
+    if (ret < 0)
+        return ret;
+    return 0;
+}
+
+#define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption rawvideo_options[] = {
+    { "video_size", "set frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, DEC },
+    { "pixel_format", "set pixel format", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
+    { "framerate", "set frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, 0, DEC },
+    { NULL },
+};
+
+static const AVClass rawvideo_demuxer_class = {
+    .class_name = "rawvideo demuxer",
+    .item_name  = av_default_item_name,
+    .option     = rawvideo_options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_rawvideo_demuxer = {
+    .name           = "rawvideo",
+    .long_name      = NULL_IF_CONFIG_SMALL("raw video"),
+    .priv_data_size = sizeof(RawVideoDemuxerContext),
+    .read_header    = rawvideo_read_header,
+    .read_packet    = rawvideo_read_packet,
+    .flags          = AVFMT_GENERIC_INDEX,
+    .extensions     = "yuv,cif,qcif,rgb",
+    .raw_codec_id   = AV_CODEC_ID_RAWVIDEO,
+    .priv_class     = &rawvideo_demuxer_class,
+};