mirror of
https://github.com/mpv-player/mpv
synced 2024-12-09 16:36:15 +00:00
fe3c4810e1
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32624 b3059339-0415-0410-9bf9-f77b7e298cf2
261 lines
5.7 KiB
C
261 lines
5.7 KiB
C
/*
|
|
* This file is part of MPlayer.
|
|
*
|
|
* MPlayer 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.
|
|
*
|
|
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "config.h"
|
|
#include "mp_msg.h"
|
|
|
|
#include "stream/stream.h"
|
|
#include "demuxer.h"
|
|
#include "parse_es.h"
|
|
#include "stheader.h"
|
|
#include "aac_hdr.h"
|
|
#include "ms_hdr.h"
|
|
|
|
typedef struct {
|
|
uint8_t *buf;
|
|
uint64_t size; /// amount of time of data packets pushed to demuxer->audio (in bytes)
|
|
float time; /// amount of time elapsed based upon samples_per_frame/sample_rate (in milliseconds)
|
|
float last_pts; /// last pts seen
|
|
int bitrate; /// bitrate computed as size/time
|
|
} aac_priv_t;
|
|
|
|
static int demux_aac_init(demuxer_t *demuxer)
|
|
{
|
|
aac_priv_t *priv;
|
|
|
|
priv = calloc(1, sizeof(aac_priv_t));
|
|
if(!priv)
|
|
return 0;
|
|
|
|
priv->buf = malloc(8);
|
|
if(!priv->buf)
|
|
{
|
|
free(priv);
|
|
return 0;
|
|
}
|
|
|
|
demuxer->priv = priv;
|
|
return 1;
|
|
}
|
|
|
|
static void demux_close_aac(demuxer_t *demuxer)
|
|
{
|
|
aac_priv_t *priv = (aac_priv_t *) demuxer->priv;
|
|
|
|
if(!priv)
|
|
return;
|
|
|
|
free(priv->buf);
|
|
|
|
free(demuxer->priv);
|
|
|
|
return;
|
|
}
|
|
|
|
/// returns DEMUXER_TYPE_AAC if it finds 8 ADTS frames in 32768 bytes, 0 otherwise
|
|
static int demux_aac_probe(demuxer_t *demuxer)
|
|
{
|
|
int cnt = 0, c, len, srate, num;
|
|
off_t init, probed;
|
|
aac_priv_t *priv;
|
|
|
|
if(! demux_aac_init(demuxer))
|
|
{
|
|
mp_msg(MSGT_DEMUX, MSGL_ERR, "COULDN'T INIT aac_demux, exit\n");
|
|
return 0;
|
|
}
|
|
|
|
priv = (aac_priv_t *) demuxer->priv;
|
|
|
|
init = probed = stream_tell(demuxer->stream);
|
|
while(probed-init <= 32768 && cnt < 8)
|
|
{
|
|
c = 0;
|
|
while(c != 0xFF)
|
|
{
|
|
c = stream_read_char(demuxer->stream);
|
|
if(c < 0)
|
|
goto fail;
|
|
}
|
|
priv->buf[0] = 0xFF;
|
|
if(stream_read(demuxer->stream, &(priv->buf[1]), 7) < 7)
|
|
goto fail;
|
|
|
|
len = aac_parse_frame(priv->buf, &srate, &num);
|
|
if(len > 0)
|
|
{
|
|
cnt++;
|
|
stream_skip(demuxer->stream, len - 8);
|
|
}
|
|
probed = stream_tell(demuxer->stream);
|
|
}
|
|
|
|
stream_seek(demuxer->stream, init);
|
|
if(cnt < 8)
|
|
goto fail;
|
|
|
|
mp_msg(MSGT_DEMUX, MSGL_V, "demux_aac_probe, INIT: %"PRIu64", PROBED: %"PRIu64", cnt: %d\n", init, probed, cnt);
|
|
return DEMUXER_TYPE_AAC;
|
|
|
|
fail:
|
|
mp_msg(MSGT_DEMUX, MSGL_V, "demux_aac_probe, failed to detect an AAC stream\n");
|
|
return 0;
|
|
}
|
|
|
|
static demuxer_t* demux_aac_open(demuxer_t *demuxer)
|
|
{
|
|
sh_audio_t *sh;
|
|
|
|
sh = new_sh_audio(demuxer, 0);
|
|
sh->ds = demuxer->audio;
|
|
sh->format = mmioFOURCC('M', 'P', '4', 'A');
|
|
demuxer->audio->id = 0;
|
|
demuxer->audio->sh = sh;
|
|
|
|
demuxer->filepos = stream_tell(demuxer->stream);
|
|
|
|
return demuxer;
|
|
}
|
|
|
|
static int demux_aac_fill_buffer(demuxer_t *demuxer, demux_stream_t *ds)
|
|
{
|
|
aac_priv_t *priv = (aac_priv_t *) demuxer->priv;
|
|
demux_packet_t *dp;
|
|
int c1, c2, len, srate, num;
|
|
float tm = 0;
|
|
|
|
if(demuxer->stream->eof || (demuxer->movi_end && stream_tell(demuxer->stream) >= demuxer->movi_end))
|
|
return 0;
|
|
|
|
while(! demuxer->stream->eof)
|
|
{
|
|
c1 = c2 = 0;
|
|
while(c1 != 0xFF)
|
|
{
|
|
c1 = stream_read_char(demuxer->stream);
|
|
if(c1 < 0)
|
|
return 0;
|
|
}
|
|
c2 = stream_read_char(demuxer->stream);
|
|
if(c2 < 0)
|
|
return 0;
|
|
if((c2 & 0xF6) != 0xF0)
|
|
continue;
|
|
|
|
priv->buf[0] = (unsigned char) c1;
|
|
priv->buf[1] = (unsigned char) c2;
|
|
if(stream_read(demuxer->stream, &(priv->buf[2]), 6) < 6)
|
|
return 0;
|
|
|
|
len = aac_parse_frame(priv->buf, &srate, &num);
|
|
if(len > 0)
|
|
{
|
|
dp = new_demux_packet(len);
|
|
if(! dp)
|
|
{
|
|
mp_msg(MSGT_DEMUX, MSGL_ERR, "fill_buffer, NEW_ADD_PACKET(%d)FAILED\n", len);
|
|
return 0;
|
|
}
|
|
|
|
|
|
memcpy(dp->buffer, priv->buf, 8);
|
|
stream_read(demuxer->stream, &(dp->buffer[8]), len-8);
|
|
if(srate)
|
|
tm = (float) (num * 1024.0/srate);
|
|
priv->last_pts += tm;
|
|
dp->pts = priv->last_pts;
|
|
//fprintf(stderr, "\nPTS: %.3f\n", dp->pts);
|
|
ds_add_packet(demuxer->audio, dp);
|
|
priv->size += len;
|
|
priv->time += tm;
|
|
|
|
priv->bitrate = (int) (priv->size / priv->time);
|
|
demuxer->filepos = stream_tell(demuxer->stream);
|
|
|
|
return len;
|
|
}
|
|
else
|
|
stream_skip(demuxer->stream, -6);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
//This is an almost verbatim copy of high_res_mp3_seek(), from demux_audio.c
|
|
static void demux_aac_seek(demuxer_t *demuxer, float rel_seek_secs, float audio_delay, int flags)
|
|
{
|
|
aac_priv_t *priv = (aac_priv_t *) demuxer->priv;
|
|
demux_stream_t *d_audio=demuxer->audio;
|
|
sh_audio_t *sh_audio=d_audio->sh;
|
|
float time;
|
|
|
|
ds_free_packs(d_audio);
|
|
|
|
time = (flags & SEEK_ABSOLUTE) ? rel_seek_secs - priv->last_pts : rel_seek_secs;
|
|
if(time < 0)
|
|
{
|
|
stream_seek(demuxer->stream, demuxer->movi_start);
|
|
time = priv->last_pts + time;
|
|
priv->last_pts = 0;
|
|
}
|
|
|
|
if(time > 0)
|
|
{
|
|
int len, nf, srate, num;
|
|
|
|
nf = time * sh_audio->samplerate/1024;
|
|
|
|
while(nf > 0)
|
|
{
|
|
if(stream_read(demuxer->stream,priv->buf, 8) < 8)
|
|
break;
|
|
len = aac_parse_frame(priv->buf, &srate, &num);
|
|
if(len <= 0)
|
|
{
|
|
stream_skip(demuxer->stream, -7);
|
|
continue;
|
|
}
|
|
stream_skip(demuxer->stream, len - 8);
|
|
priv->last_pts += (float) (num*1024.0/srate);
|
|
nf -= num;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
const demuxer_desc_t demuxer_desc_aac = {
|
|
"AAC demuxer",
|
|
"aac",
|
|
"AAC",
|
|
"Nico Sabbi",
|
|
"Raw AAC files ",
|
|
DEMUXER_TYPE_AAC,
|
|
0, // unsafe autodetect
|
|
demux_aac_probe,
|
|
demux_aac_fill_buffer,
|
|
demux_aac_open,
|
|
demux_close_aac,
|
|
demux_aac_seek,
|
|
NULL
|
|
};
|