-/*
+/*
* amr file format
* Copyright (c) 2001 ffmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of Libav.
+ *
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
Write and read amr data according to RFC3267, http://www.ietf.org/rfc/rfc3267.txt?number=3267
-Only amr narrowband (not amr-wb) is supported for now.
+Only mono files are supported.
*/
#include "avformat.h"
-#include "avi.h"
+#include "internal.h"
-static const unsigned char AMR_header [] = "#!AMR\n";
-
-/* AMR_FILE header */
-static int put_amr_header(ByteIOContext *pb, AVCodecContext *enc)
-{
- put_tag(pb, AMR_header); /* magic number */
- return 0;
-}
+static const char AMR_header [] = "#!AMR\n";
+static const char AMRWB_header [] = "#!AMR-WB\n";
+#if CONFIG_AMR_MUXER
static int amr_write_header(AVFormatContext *s)
{
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
+ AVCodecContext *enc = s->streams[0]->codec;
s->priv_data = NULL;
- /* format header */
- if (put_amr_header(pb, &s->streams[0]->codec) < 0) {
+ if (enc->codec_id == CODEC_ID_AMR_NB)
+ {
+ avio_write(pb, AMR_header, sizeof(AMR_header) - 1); /* magic number */
+ }
+ else if(enc->codec_id == CODEC_ID_AMR_WB)
+ {
+ avio_write(pb, AMRWB_header, sizeof(AMRWB_header) - 1); /* magic number */
+ }
+ else
+ {
return -1;
}
-
- put_flush_packet(pb);
-
+ avio_flush(pb);
return 0;
}
-static int amr_write_packet(AVFormatContext *s, int stream_index_ptr,
- uint8_t *buf, int size, int force_pts)
-{
- put_buffer(&s->pb, buf, size);
- put_flush_packet(&s->pb);
- return 0;
-}
-
-static int amr_write_trailer(AVFormatContext *s)
+static int amr_write_packet(AVFormatContext *s, AVPacket *pkt)
{
+ avio_write(s->pb, pkt->data, pkt->size);
+ avio_flush(s->pb);
return 0;
}
+#endif /* CONFIG_AMR_MUXER */
static int amr_probe(AVProbeData *p)
{
- /* check file header */
- if (p->buf_size < 6)
- return 0;
- if(memcmp(p->buf,AMR_header,6)==0)
+ //Only check for "#!AMR" which could be amr-wb, amr-nb.
+ //This will also trigger multichannel files: "#!AMR_MC1.0\n" and
+ //"#!AMR-WB_MC1.0\n" (not supported)
+
+ if(memcmp(p->buf,AMR_header,5)==0)
return AVPROBE_SCORE_MAX;
else
return 0;
}
/* amr input */
-static int amr_read_header(AVFormatContext *s,
- AVFormatParameters *ap)
+static int amr_read_header(AVFormatContext *s)
{
- ByteIOContext *pb = &s->pb;
+ AVIOContext *pb = s->pb;
AVStream *st;
- u_int8_t header[6];
+ uint8_t header[9];
- get_buffer(pb, header, 6);
+ avio_read(pb, header, 6);
+ st = avformat_new_stream(s, NULL);
+ if (!st)
+ {
+ return AVERROR(ENOMEM);
+ }
if(memcmp(header,AMR_header,6)!=0)
{
- return -1;
+ avio_read(pb, header+6, 3);
+ if(memcmp(header,AMRWB_header,9)!=0)
+ {
+ return -1;
+ }
+
+ st->codec->codec_tag = MKTAG('s', 'a', 'w', 'b');
+ st->codec->codec_id = CODEC_ID_AMR_WB;
+ st->codec->sample_rate = 16000;
}
+ else
+ {
+ st->codec->codec_tag = MKTAG('s', 'a', 'm', 'r');
+ st->codec->codec_id = CODEC_ID_AMR_NB;
+ st->codec->sample_rate = 8000;
+ }
+ st->codec->channels = 1;
+ st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
- st = av_new_stream(s, 0);
- if (!st)
- return AVERROR_NOMEM;
-
- st->codec.codec_type = CODEC_TYPE_AUDIO;
- st->codec.codec_tag = CODEC_ID_AMR_NB;
- st->codec.codec_id = CODEC_ID_AMR_NB;
- st->codec.channels = 1;
- st->codec.sample_rate = 8000;
return 0;
}
-#define MAX_SIZE 32
-
static int amr_read_packet(AVFormatContext *s,
AVPacket *pkt)
{
- static u_int16_t packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
- u_int8_t toc, q, ft;
- int read;
- int size;
+ AVCodecContext *enc = s->streams[0]->codec;
+ int read, size = 0, toc, mode;
+ int64_t pos = avio_tell(s->pb);
- if (url_feof(&s->pb))
- return -EIO;
+ if (s->pb->eof_reached)
+ {
+ return AVERROR(EIO);
+ }
+
+//FIXME this is wrong, this should rather be in a AVParset
+ toc=avio_r8(s->pb);
+ mode = (toc >> 3) & 0x0F;
- toc=0;
+ if (enc->codec_id == CODEC_ID_AMR_NB)
+ {
+ static const uint8_t packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
- toc=get_byte(&s->pb);
+ size=packed_size[mode]+1;
+ }
+ else if(enc->codec_id == CODEC_ID_AMR_WB)
+ {
+ static uint8_t packed_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
+
+ size=packed_size[mode];
+ }
+ else
+ {
+ assert(0);
+ }
- q = (toc >> 2) & 0x01;
- ft = (toc >> 3) & 0x0F;
+ if ( (size==0) || av_new_packet(pkt, size))
+ {
+ return AVERROR(EIO);
+ }
- size=packed_size[ft];
- //printf("amr_read_packet size=%d\n",size);
+ /* Both AMR formats have 50 frames per second */
+ s->streams[0]->codec->bit_rate = size*8*50;
- if (av_new_packet(pkt, size+1))
- return -EIO;
pkt->stream_index = 0;
-
+ pkt->pos = pos;
pkt->data[0]=toc;
+ pkt->duration= enc->codec_id == CODEC_ID_AMR_NB ? 160 : 320;
+ read = avio_read(s->pb, pkt->data+1, size-1);
- read = get_buffer(&s->pb, pkt->data+1, size);
-
- if (read != size)
+ if (read != size-1)
{
av_free_packet(pkt);
- return -EIO;
+ return AVERROR(EIO);
}
return 0;
}
-static int amr_read_close(AVFormatContext *s)
-{
- return 0;
-}
-
-static AVInputFormat amr_iformat = {
- "amr",
- "3gpp amr file format",
- 0,
- amr_probe,
- amr_read_header,
- amr_read_packet,
- amr_read_close,
+#if CONFIG_AMR_DEMUXER
+AVInputFormat ff_amr_demuxer = {
+ .name = "amr",
+ .long_name = NULL_IF_CONFIG_SMALL("3GPP AMR file format"),
+ .read_probe = amr_probe,
+ .read_header = amr_read_header,
+ .read_packet = amr_read_packet,
+ .flags = AVFMT_GENERIC_INDEX,
};
-
-static AVOutputFormat amr_oformat = {
- "amr",
- "3gpp amr file format",
- "audio/amr",
- "amr",
- 0,
- CODEC_ID_AMR_NB,
- CODEC_ID_NONE,
- amr_write_header,
- amr_write_packet,
- amr_write_trailer,
+#endif
+
+#if CONFIG_AMR_MUXER
+AVOutputFormat ff_amr_muxer = {
+ .name = "amr",
+ .long_name = NULL_IF_CONFIG_SMALL("3GPP AMR file format"),
+ .mime_type = "audio/amr",
+ .extensions = "amr",
+ .audio_codec = CODEC_ID_AMR_NB,
+ .video_codec = CODEC_ID_NONE,
+ .write_header = amr_write_header,
+ .write_packet = amr_write_packet,
};
-
-int amr_init(void)
-{
- av_register_input_format(&amr_iformat);
- av_register_output_format(&amr_oformat);
- return 0;
-}
+#endif
projects / ffmpeg / blobdiff