* amr file format
* Copyright (c) 2001 ffmpeg project
*
- * 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 "avformat.h"
+#include "internal.h"
-static const char AMR_header [] = "#!AMR\n";
-static const char AMRWB_header [] = "#!AMR-WB\n";
+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)
{
- AVIOContext *pb = s->pb;
+ AVIOContext *pb = s->pb;
AVCodecContext *enc = s->streams[0]->codec;
s->priv_data = NULL;
- if (enc->codec_id == CODEC_ID_AMR_NB)
- {
+ if (enc->codec_id == AV_CODEC_ID_AMR_NB) {
avio_write(pb, AMR_header, sizeof(AMR_header) - 1); /* magic number */
- }
- else if(enc->codec_id == CODEC_ID_AMR_WB)
- {
+ } else if (enc->codec_id == AV_CODEC_ID_AMR_WB) {
avio_write(pb, AMRWB_header, sizeof(AMRWB_header) - 1); /* magic number */
- }
- else
- {
+ } else {
return -1;
}
- put_flush_packet(pb);
+ avio_flush(pb);
return 0;
}
static int amr_write_packet(AVFormatContext *s, AVPacket *pkt)
{
avio_write(s->pb, pkt->data, pkt->size);
- put_flush_packet(s->pb);
+ avio_flush(s->pb);
return 0;
}
#endif /* CONFIG_AMR_MUXER */
static int amr_probe(AVProbeData *p)
{
- //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)
+ // 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)
+ if (!memcmp(p->buf, AMR_header, 5))
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)
{
AVIOContext *pb = s->pb;
AVStream *st;
avio_read(pb, header, 6);
- st = av_new_stream(s, 0);
+ st = avformat_new_stream(s, NULL);
if (!st)
- {
return AVERROR(ENOMEM);
- }
- if(memcmp(header,AMR_header,6)!=0)
- {
- avio_read(pb, header+6, 3);
- if(memcmp(header,AMRWB_header,9)!=0)
- {
+ if (memcmp(header, AMR_header, 6)) {
+ avio_read(pb, header + 6, 3);
+ if (memcmp(header, AMRWB_header, 9)) {
return -1;
}
- st->codec->codec_tag = MKTAG('s', 'a', 'w', 'b');
- st->codec->codec_id = CODEC_ID_AMR_WB;
+ st->codec->codec_tag = MKTAG('s', 'a', 'w', 'b');
+ st->codec->codec_id = AV_CODEC_ID_AMR_WB;
st->codec->sample_rate = 16000;
- st->codec->frame_size = 320;
- }
- else
- {
- st->codec->codec_tag = MKTAG('s', 'a', 'm', 'r');
- st->codec->codec_id = CODEC_ID_AMR_NB;
+ } else {
+ st->codec->codec_tag = MKTAG('s', 'a', 'm', 'r');
+ st->codec->codec_id = AV_CODEC_ID_AMR_NB;
st->codec->sample_rate = 8000;
- st->codec->frame_size = 160;
}
- st->codec->channels = 1;
+ st->codec->channels = 1;
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
- av_set_pts_info(st, 64, 1, st->codec->sample_rate);
+ avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
return 0;
}
-static int amr_read_packet(AVFormatContext *s,
- AVPacket *pkt)
+static int amr_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecContext *enc = s->streams[0]->codec;
int read, size = 0, toc, mode;
+ int64_t pos = avio_tell(s->pb);
- if (url_feof(s->pb))
- {
+ if (s->pb->eof_reached) {
return AVERROR(EIO);
}
-//FIXME this is wrong, this should rather be in a AVParset
- toc=avio_r8(s->pb);
+ // FIXME this is wrong, this should rather be in a AVParset
+ toc = avio_r8(s->pb);
mode = (toc >> 3) & 0x0F;
- 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};
+ if (enc->codec_id == AV_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
+ };
- 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] + 1;
+ } else if (enc->codec_id == AV_CODEC_ID_AMR_WB) {
+ static const 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
- {
+ size = packed_size[mode];
+ } else {
assert(0);
}
- if ( (size==0) || av_new_packet(pkt, size))
- {
+ if (!size || av_new_packet(pkt, size))
return AVERROR(EIO);
- }
+
+ /* Both AMR formats have 50 frames per second */
+ s->streams[0]->codec->bit_rate = size*8*50;
pkt->stream_index = 0;
- pkt->pos= avio_tell(s->pb);
- 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);
+ pkt->pos = pos;
+ pkt->data[0] = toc;
+ pkt->duration = enc->codec_id == AV_CODEC_ID_AMR_NB ? 160 : 320;
+ read = avio_read(s->pb, pkt->data + 1, size - 1);
- if (read != size-1)
- {
+ if (read != size - 1) {
av_free_packet(pkt);
return AVERROR(EIO);
}
#if CONFIG_AMR_DEMUXER
AVInputFormat ff_amr_demuxer = {
- "amr",
- NULL_IF_CONFIG_SMALL("3GPP AMR file format"),
- 0, /*priv_data_size*/
- amr_probe,
- amr_read_header,
- amr_read_packet,
- NULL,
+ .name = "amr",
+ .long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"),
+ .read_probe = amr_probe,
+ .read_header = amr_read_header,
+ .read_packet = amr_read_packet,
+ .flags = AVFMT_GENERIC_INDEX,
};
#endif
#if CONFIG_AMR_MUXER
AVOutputFormat ff_amr_muxer = {
- "amr",
- NULL_IF_CONFIG_SMALL("3GPP AMR file format"),
- "audio/amr",
- "amr",
- 0,
- CODEC_ID_AMR_NB,
- CODEC_ID_NONE,
- amr_write_header,
- amr_write_packet,
+ .name = "amr",
+ .long_name = NULL_IF_CONFIG_SMALL("3GPP AMR"),
+ .mime_type = "audio/amr",
+ .extensions = "amr",
+ .audio_codec = AV_CODEC_ID_AMR_NB,
+ .video_codec = AV_CODEC_ID_NONE,
+ .write_header = amr_write_header,
+ .write_packet = amr_write_packet,
};
#endif
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