renamed libav to libavformat

Originally committed as revision 1276 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 509 insertions, 0 deletions

diff --git a/libavformat/raw.c b/libavformat/raw.c
new file mode 100644
index 0000000000..518206ea56
--- /dev/null
+++ b/libavformat/raw.c
@@ -0,0 +1,509 @@
+/* 
+ * RAW encoder and decoder
+ * Copyright (c) 2001 Fabrice Bellard.
+ *
+ * This library 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#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, int force_pts)
+{
+    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;
+    int id;
+
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR_NOMEM;
+    if (ap) {
+        id = s->iformat->value;
+        if (id == CODEC_ID_RAWVIDEO) {
+            st->codec.codec_type = CODEC_TYPE_VIDEO;
+        } else {
+            st->codec.codec_type = CODEC_TYPE_AUDIO;
+        }
+        st->codec.codec_id = id;
+
+        switch(st->codec.codec_type) {
+        case CODEC_TYPE_AUDIO:
+            st->codec.sample_rate = ap->sample_rate;
+            st->codec.channels = ap->channels;
+            break;
+        case CODEC_TYPE_VIDEO:
+            st->codec.frame_rate = ap->frame_rate;
+            st->codec.width = ap->width;
+            st->codec.height = ap->height;
+            break;
+        default:
+            return -1;
+        }
+    } else {
+        return -1;
+    }
+    return 0;
+}
+
+#define RAW_PACKET_SIZE 1024
+
+int raw_read_packet(AVFormatContext *s,
+                    AVPacket *pkt)
+{
+    int ret, size;
+    AVStream *st = s->streams[0];
+    
+    size= RAW_PACKET_SIZE;
+
+    if (av_new_packet(pkt, size) < 0)
+        return -EIO;
+
+    pkt->stream_index = 0;
+    ret = get_buffer(&s->pb, pkt->data, size);
+    if (ret <= 0) {
+        av_free_packet(pkt);
+        return -EIO;
+    }
+    /* note: we need to modify the packet size here to handle the last
+       packet */
+    pkt->size = ret;
+    return ret;
+}
+
+int raw_read_close(AVFormatContext *s)
+{
+    return 0;
+}
+
+/* mp3 read */
+static int mp3_read_header(AVFormatContext *s,
+                           AVFormatParameters *ap)
+{
+    AVStream *st;
+
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR_NOMEM;
+
+    st->codec.codec_type = CODEC_TYPE_AUDIO;
+    st->codec.codec_id = CODEC_ID_MP2;
+    /* the parameters will be extracted from the compressed bitstream */
+    return 0;
+}
+
+/* mpeg1/h263 input */
+static int video_read_header(AVFormatContext *s,
+                             AVFormatParameters *ap)
+{
+    AVStream *st;
+
+    st = av_new_stream(s, 0);
+    if (!st)
+        return AVERROR_NOMEM;
+
+    st->codec.codec_type = CODEC_TYPE_VIDEO;
+    st->codec.codec_id = s->iformat->value;
+    /* for mjpeg, specify frame rate */
+    /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
+    if (st->codec.codec_id == CODEC_ID_MJPEG || st->codec.codec_id == CODEC_ID_MPEG4) {
+        if (ap) {
+            st->codec.frame_rate = ap->frame_rate;
+        } else {
+            st->codec.frame_rate = 25 * FRAME_RATE_BASE;
+        }
+    }
+    return 0;
+}
+
+#define SEQ_START_CODE		0x000001b3
+#define GOP_START_CODE		0x000001b8
+#define PICTURE_START_CODE	0x00000100
+
+/* XXX: improve that by looking at several start codes */
+static int mpegvideo_probe(AVProbeData *p)
+{
+    int code, c, i;
+    code = 0xff;
+
+    /* we search the first start code. If it is a sequence, gop or
+       picture start code then we decide it is an mpeg video
+       stream. We do not send highest value to give a chance to mpegts */
+    for(i=0;i<p->buf_size;i++) {
+        c = p->buf[i];
+        code = (code << 8) | c;
+        if ((code & 0xffffff00) == 0x100) {
+            if (code == SEQ_START_CODE ||
+                code == GOP_START_CODE ||
+                code == PICTURE_START_CODE)
+                return 50 - 1;
+            else
+                return 0;
+        }
+    }
+    return 0;
+}
+
+AVInputFormat mp3_iformat = {
+    "mp3",
+    "MPEG audio",
+    0,
+    NULL,
+    mp3_read_header,
+    raw_read_packet,
+    raw_read_close,
+    .extensions = "mp2,mp3", /* XXX: use probe */
+};
+
+AVOutputFormat mp2_oformat = {
+    "mp2",
+    "MPEG audio layer 2",
+    "audio/x-mpeg",
+    "mp2,mp3",
+    0,
+    CODEC_ID_MP2,
+    0,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+
+AVInputFormat ac3_iformat = {
+    "ac3",
+    "raw ac3",
+    0,
+    NULL,
+    raw_read_header,
+    raw_read_packet,
+    raw_read_close,
+    .extensions = "ac3",
+    .value = CODEC_ID_AC3,
+};
+
+AVOutputFormat ac3_oformat = {
+    "ac3",
+    "raw ac3",
+    "audio/x-ac3", 
+    "ac3",
+    0,
+    CODEC_ID_AC3,
+    0,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+AVOutputFormat h263_oformat = {
+    "h263",
+    "raw h263",
+    "video/x-h263",
+    "h263",
+    0,
+    0,
+    CODEC_ID_H263,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+AVInputFormat m4v_iformat = {
+    "m4v",
+    "raw MPEG4 video format",
+    0,
+    NULL /*mpegvideo_probe*/,
+    video_read_header,
+    raw_read_packet,
+    raw_read_close,
+    .extensions = "m4v", //FIXME remove after writing mpeg4_probe
+    .value = CODEC_ID_MPEG4,
+};
+
+AVOutputFormat m4v_oformat = {
+    "m4v",
+    "raw MPEG4 video format",
+    NULL,
+    "m4v",
+    0,
+    CODEC_ID_NONE,
+    CODEC_ID_MPEG4,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+AVInputFormat mpegvideo_iformat = {
+    "mpegvideo",
+    "MPEG video",
+    0,
+    mpegvideo_probe,
+    video_read_header,
+    raw_read_packet,
+    raw_read_close,
+    .value = CODEC_ID_MPEG1VIDEO,
+};
+
+AVOutputFormat mpeg1video_oformat = {
+    "mpeg1video",
+    "MPEG video",
+    "video/x-mpeg",
+    "mpg,mpeg",
+    0,
+    0,
+    CODEC_ID_MPEG1VIDEO,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+AVInputFormat mjpeg_iformat = {
+    "mjpeg",
+    "MJPEG video",
+    0,
+    NULL,
+    video_read_header,
+    raw_read_packet,
+    raw_read_close,
+    .extensions = "mjpg,mjpeg",
+    .value = CODEC_ID_MJPEG,
+};
+
+AVOutputFormat mjpeg_oformat = {
+    "mjpeg",
+    "MJPEG video",
+    "video/x-mjpeg",
+    "mjpg,mjpeg",
+    0,
+    0,
+    CODEC_ID_MJPEG,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+/* pcm formats */
+
+#define PCMDEF(name, long_name, ext, codec) \
+AVInputFormat pcm_ ## name ## _iformat = {\
+    #name,\
+    long_name,\
+    0,\
+    NULL,\
+    raw_read_header,\
+    raw_read_packet,\
+    raw_read_close,\
+    .extensions = ext,\
+    .value = codec,\
+};\
+\
+AVOutputFormat pcm_ ## name ## _oformat = {\
+    #name,\
+    long_name,\
+    NULL,\
+    ext,\
+    0,\
+    codec,\
+    0,\
+    raw_write_header,\
+    raw_write_packet,\
+    raw_write_trailer,\
+};
+
+#ifdef WORDS_BIGENDIAN
+#define BE_DEF(s) s
+#define LE_DEF(s) NULL
+#else
+#define BE_DEF(s) NULL
+#define LE_DEF(s) s
+#endif
+
+
+PCMDEF(s16le, "pcm signed 16 bit little endian format", 
+       LE_DEF("sw"), CODEC_ID_PCM_S16LE)
+
+PCMDEF(s16be, "pcm signed 16 bit big endian format", 
+       BE_DEF("sw"), CODEC_ID_PCM_S16BE)
+
+PCMDEF(u16le, "pcm unsigned 16 bit little endian format", 
+       LE_DEF("uw"), CODEC_ID_PCM_U16LE)
+
+PCMDEF(u16be, "pcm unsigned 16 bit big endian format", 
+       BE_DEF("uw"), CODEC_ID_PCM_U16BE)
+
+PCMDEF(s8, "pcm signed 8 bit format", 
+       "sb", CODEC_ID_PCM_S8)
+
+PCMDEF(u8, "pcm unsigned 8 bit format", 
+       "ub", CODEC_ID_PCM_U8)
+
+PCMDEF(mulaw, "pcm mu law format", 
+       "ul", CODEC_ID_PCM_MULAW)
+
+PCMDEF(alaw, "pcm A law format", 
+       "al", CODEC_ID_PCM_ALAW)
+
+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:
+        av_abort();
+        break;
+    }
+
+    if (av_new_packet(pkt, packet_size) < 0)
+        return -EIO;
+
+    pkt->stream_index = 0;
+#if 0
+    /* bypass buffered I/O */
+    ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
+#else
+    ret = get_buffer(&s->pb, pkt->data, pkt->size);
+#endif
+    if (ret != pkt->size) {
+        av_free_packet(pkt);
+        return -EIO;
+    } else {
+        return 0;
+    }
+}
+
+AVInputFormat rawvideo_iformat = {
+    "rawvideo",
+    "raw video format",
+    0,
+    NULL,
+    raw_read_header,
+    rawvideo_read_packet,
+    raw_read_close,
+    .extensions = "yuv",
+    .value = CODEC_ID_RAWVIDEO,
+};
+
+AVOutputFormat rawvideo_oformat = {
+    "rawvideo",
+    "raw video format",
+    NULL,
+    "yuv",
+    0,
+    CODEC_ID_NONE,
+    CODEC_ID_RAWVIDEO,
+    raw_write_header,
+    raw_write_packet,
+    raw_write_trailer,
+};
+
+static int null_write_packet(struct AVFormatContext *s, 
+                             int stream_index,
+                             unsigned char *buf, int size, int force_pts)
+{
+    return 0;
+}
+
+AVOutputFormat null_oformat = {
+    "null",
+    "null video format",
+    NULL,
+    NULL,
+    0,
+#ifdef WORDS_BIGENDIAN
+    CODEC_ID_PCM_S16BE,
+#else
+    CODEC_ID_PCM_S16LE,
+#endif
+    CODEC_ID_RAWVIDEO,
+    raw_write_header,
+    null_write_packet,
+    raw_write_trailer,
+    .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
+};
+
+int raw_init(void)
+{
+    av_register_input_format(&mp3_iformat);
+    av_register_output_format(&mp2_oformat);
+    
+    av_register_input_format(&ac3_iformat);
+    av_register_output_format(&ac3_oformat);
+
+    av_register_output_format(&h263_oformat);
+    
+    av_register_input_format(&m4v_iformat);
+    av_register_output_format(&m4v_oformat);
+
+    av_register_input_format(&mpegvideo_iformat);
+    av_register_output_format(&mpeg1video_oformat);
+
+    av_register_input_format(&mjpeg_iformat);
+    av_register_output_format(&mjpeg_oformat);
+
+    av_register_input_format(&pcm_s16le_iformat);
+    av_register_output_format(&pcm_s16le_oformat);
+    av_register_input_format(&pcm_s16be_iformat);
+    av_register_output_format(&pcm_s16be_oformat);
+    av_register_input_format(&pcm_u16le_iformat);
+    av_register_output_format(&pcm_u16le_oformat);
+    av_register_input_format(&pcm_u16be_iformat);
+    av_register_output_format(&pcm_u16be_oformat);
+    av_register_input_format(&pcm_s8_iformat);
+    av_register_output_format(&pcm_s8_oformat);
+    av_register_input_format(&pcm_u8_iformat);
+    av_register_output_format(&pcm_u8_oformat);
+    av_register_input_format(&pcm_mulaw_iformat);
+    av_register_output_format(&pcm_mulaw_oformat);
+    av_register_input_format(&pcm_alaw_iformat);
+    av_register_output_format(&pcm_alaw_oformat);
+
+    av_register_input_format(&rawvideo_iformat);
+    av_register_output_format(&rawvideo_oformat);
+
+    av_register_output_format(&null_oformat);
+    return 0;
+}