examples/decode_video: switch to the new decoding API

[ffmpeg] / libavformat / rawvideodec.c

diff --git a/libavformat/rawvideodec.c b/libavformat/rawvideodec.c
index 1609875854aa889e6e0ccbbb5ffab0091e1d6940..cea1b0bc845ff89f0e787a57fac553f2492652f5 100644 (file)
--- a/libavformat/rawvideodec.c
+++ b/libavformat/rawvideodec.c
@@ -2,41 +2,96 @@
  * RAW video demuxer
  * Copyright (c) 2001 Fabrice Bellard
  *
- * This file is part of FFmpeg.
+ * This file is part of Libav.
  *
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "libavutil/imgutils.h"
+#include "libavutil/parseutils.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+#include "internal.h"
 #include "avformat.h"
-#include "raw.h"
+
+typedef struct RawVideoDemuxerContext {
+    const AVClass *class;     /**< Class for private options. */
+    char *video_size;         /**< String describing video size, set by a private option. */
+    char *pixel_format;       /**< Set by a private option. */
+    char *framerate;          /**< String describing framerate, set by a private option. */
+} RawVideoDemuxerContext;
+
+
+static int rawvideo_read_header(AVFormatContext *ctx)
+{
+    RawVideoDemuxerContext *s = ctx->priv_data;
+    int width = 0, height = 0, ret = 0;
+    enum AVPixelFormat pix_fmt;
+    AVRational framerate;
+    AVStream *st;
+
+    st = avformat_new_stream(ctx, NULL);
+    if (!st)
+        return AVERROR(ENOMEM);
+
+    st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
+
+    st->codecpar->codec_id = ctx->iformat->raw_codec_id;
+
+    if (s->video_size &&
+        (ret = av_parse_video_size(&width, &height, s->video_size)) < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Couldn't parse video size.\n");
+        return ret;
+    }
+
+    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);
+    }
+
+    if ((ret = av_parse_video_rate(&framerate, s->framerate)) < 0) {
+        av_log(ctx, AV_LOG_ERROR, "Could not parse framerate: %s.\n",
+               s->framerate);
+        return ret;
+    }
+
+    avpriv_set_pts_info(st, 64, framerate.den, framerate.num);
+
+    st->codecpar->width  = width;
+    st->codecpar->height = height;
+    st->codecpar->format = pix_fmt;
+
+    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;
+    width = st->codecpar->width;
+    height = st->codecpar->height;
 
-    packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
+    packet_size = av_image_get_buffer_size(st->codecpar->format, width, height, 1);
     if (packet_size < 0)
         return -1;
 
-    ret= av_get_packet(s->pb, pkt, packet_size);
-    pkt->pts=
-    pkt->dts= pkt->pos / packet_size;
+    ret = av_get_packet(s->pb, pkt, packet_size);
+    pkt->pts = pkt->dts = pkt->pos / packet_size;
 
     pkt->stream_index = 0;
     if (ret < 0)
@@ -44,14 +99,30 @@ static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
     return 0;
 }
 
-AVInputFormat rawvideo_demuxer = {
-    "rawvideo",
-    NULL_IF_CONFIG_SMALL("raw video format"),
-    0,
-    NULL,
-    ff_raw_read_header,
-    rawvideo_read_packet,
-    .flags= AVFMT_GENERIC_INDEX,
-    .extensions = "yuv,cif,qcif,rgb",
-    .value = CODEC_ID_RAWVIDEO,
+#define OFFSET(x) offsetof(RawVideoDemuxerContext, x)
+#define DEC AV_OPT_FLAG_DECODING_PARAM
+static const AVOption rawvideo_options[] = {
+    { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, DEC },
+    { "pixel_format", "", OFFSET(pixel_format), AV_OPT_TYPE_STRING, {.str = "yuv420p"}, 0, 0, DEC },
+    { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.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,
 };