Initial revision

Originally committed as revision 5 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 288 insertions, 0 deletions

diff --git a/libav/raw.c b/libav/raw.c
new file mode 100644
index 0000000000..47dfa3b0fe
--- /dev/null
+++ b/libav/raw.c
@@ -0,0 +1,288 @@
+/* 
+ * RAW encoder and decoder
+ * Copyright (c) 2001 Gerard Lantau.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <errno.h>
+#include "avformat.h"
+
+/* simple formats */
+int raw_write_header(struct AVFormatContext *s)
+{
+    return 0;
+}
+
+int raw_write_packet(struct AVFormatContext *s, 
+                     int stream_index,
+                     unsigned char *buf, int size)
+{
+    put_buffer(&s->pb, buf, size);
+    put_flush_packet(&s->pb);
+    return 0;
+}
+
+int raw_write_trailer(struct AVFormatContext *s)
+{
+    return 0;
+}
+
+/* raw input */
+static int raw_read_header(AVFormatContext *s,
+                           AVFormatParameters *ap)
+{
+    AVStream *st;
+
+    st = malloc(sizeof(AVStream));
+    if (!st)
+        return -1;
+    s->nb_streams = 1;
+    s->streams[0] = st;
+
+    st->id = 0;
+
+    if (ap) {
+        if (s->format->audio_codec != CODEC_ID_NONE) {
+            st->codec.codec_type = CODEC_TYPE_AUDIO;
+            st->codec.codec_id = s->format->audio_codec;
+        } else if (s->format->video_codec != CODEC_ID_NONE) {
+            st->codec.codec_type = CODEC_TYPE_VIDEO;
+            st->codec.codec_id = s->format->video_codec;
+        } else {
+            free(st);
+            return -1;
+        }
+        
+        switch(st->codec.codec_type) {
+        case CODEC_TYPE_AUDIO:
+            st->codec.sample_rate = ap->sample_rate;
+            st->codec.channels = ap->channels;
+            /* XXX: endianness */
+            break;
+        case CODEC_TYPE_VIDEO:
+            st->codec.frame_rate = ap->frame_rate;
+            st->codec.width = ap->width;
+            st->codec.height = ap->height;
+            break;
+        default:
+            abort();
+            break;
+        }
+    } else {
+        abort();
+    }
+    return 0;
+}
+
+#define MIN_SIZE 1024
+
+int raw_read_packet(AVFormatContext *s,
+                    AVPacket *pkt)
+{
+    int packet_size, n, ret;
+
+    if (url_feof(&s->pb))
+        return -EIO;
+
+    packet_size = url_get_packet_size(&s->pb);
+    n = MIN_SIZE / packet_size;
+    if (n <= 0)
+        n = 1;
+    if (av_new_packet(pkt, n * packet_size) < 0)
+        return -EIO;
+
+    pkt->stream_index = 0;
+    ret = get_buffer(&s->pb, pkt->data, pkt->size);
+    if (ret < 0)
+        av_free_packet(pkt);
+    return ret;
+}
+
+int raw_read_close(AVFormatContext *s)
+{
+    return 0;
+}
+
+/* mp3 read */
+static int mp3_read_header(AVFormatContext *s,
+                           AVFormatParameters *ap)
+{
+    AVStream *st;
+
+    st = malloc(sizeof(AVStream));
+    if (!st)
+        return -1;
+    s->nb_streams = 1;
+    s->streams[0] = st;
+
+    st->id = 0;
+
+    st->codec.codec_type = CODEC_TYPE_AUDIO;
+    st->codec.codec_id = CODEC_ID_MP2;
+    /* XXX: read the first frame and extract rate and channels */
+    st->codec.sample_rate = 44100;
+    st->codec.channels = 2;
+    return 0;
+}
+
+/* mpeg1/h263 input */
+static int video_read_header(AVFormatContext *s,
+                             AVFormatParameters *ap)
+{
+    AVStream *st;
+
+    st = av_mallocz(sizeof(AVStream));
+    if (!st)
+        return -1;
+    s->nb_streams = 1;
+    s->streams[0] = st;
+
+    st->codec.codec_type = CODEC_TYPE_VIDEO;
+    st->codec.codec_id = s->format->video_codec;
+    return 0;
+}
+
+AVFormat mp2_format = {
+    "mp2",
+    "MPEG audio",
+    "audio/x-mpeg",
+    "mp2,mp3",
+    CODEC_ID_MP2,
+    0,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+
+    mp3_read_header,
+    raw_read_packet,
+    raw_read_close,
+};
+
+AVFormat ac3_format = {
+    "ac3",
+    "raw ac3",
+    "audio/x-ac3", 
+    "ac3",
+    CODEC_ID_AC3,
+    0,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+AVFormat h263_format = {
+    "h263",
+    "raw h263",
+    "video/x-h263",
+    "h263",
+    0,
+    CODEC_ID_H263,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+    video_read_header,
+    raw_read_packet,
+    raw_read_close,
+};
+
+AVFormat mpeg1video_format = {
+    "mpegvideo",
+    "MPEG video",
+    "video/x-mpeg",
+    "mpg,mpeg",
+    0,
+    CODEC_ID_MPEG1VIDEO,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+    video_read_header,
+    raw_read_packet,
+    raw_read_close,
+};
+
+AVFormat pcm_format = {
+    "pcm",
+    "pcm raw format",
+    NULL,
+    "sw",
+    CODEC_ID_PCM,
+    0,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+
+    raw_read_header,
+    raw_read_packet,
+    raw_read_close,
+};
+
+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;
+
+    switch(st->codec.pix_fmt) {
+    case PIX_FMT_YUV420P:
+        packet_size = (width * height * 3) / 2;
+        break;
+    case PIX_FMT_YUV422:
+        packet_size = (width * height * 2);
+        break;
+    case PIX_FMT_BGR24:
+    case PIX_FMT_RGB24:
+        packet_size = (width * height * 3);
+        break;
+    default:
+        abort();
+        break;
+    }
+
+    if (av_new_packet(pkt, packet_size) < 0)
+        return -EIO;
+
+    pkt->stream_index = 0;
+    /* bypass buffered I/O */
+    ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
+    if (ret != pkt->size) {
+        av_free_packet(pkt);
+        return -EIO;
+    } else {
+        return 0;
+    }
+}
+
+AVFormat rawvideo_format = {
+    "rawvideo",
+    "raw video format",
+    NULL,
+    "yuv",
+    CODEC_ID_NONE,
+    CODEC_ID_RAWVIDEO,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+
+    raw_read_header,
+    rawvideo_read_packet,
+    raw_read_close,
+};