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-rw-r--r--audio/decode/ad_dvdpcm.c162
1 files changed, 162 insertions, 0 deletions
diff --git a/audio/decode/ad_dvdpcm.c b/audio/decode/ad_dvdpcm.c
new file mode 100644
index 0000000000..41f6a1426d
--- /dev/null
+++ b/audio/decode/ad_dvdpcm.c
@@ -0,0 +1,162 @@
+/*
+ * 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 <unistd.h>
+
+#include "config.h"
+#include "mp_msg.h"
+#include "ad_internal.h"
+
+static const ad_info_t info =
+{
+ "Uncompressed DVD/VOB LPCM audio decoder",
+ "dvdpcm",
+ "Nick Kurshev",
+ "A'rpi",
+ ""
+};
+
+LIBAD_EXTERN(dvdpcm)
+
+static int init(sh_audio_t *sh)
+{
+/* DVD PCM Audio:*/
+ sh->i_bps = 0;
+ if(sh->codecdata_len==3){
+ // we have LPCM header:
+ unsigned char h=sh->codecdata[1];
+ sh->channels=1+(h&7);
+ switch((h>>4)&3){
+ case 0: sh->samplerate=48000;break;
+ case 1: sh->samplerate=96000;break;
+ case 2: sh->samplerate=44100;break;
+ case 3: sh->samplerate=32000;break;
+ }
+ switch ((h >> 6) & 3) {
+ case 0:
+ sh->sample_format = AF_FORMAT_S16_BE;
+ sh->samplesize = 2;
+ break;
+ case 1:
+ mp_tmsg(MSGT_DECAUDIO, MSGL_INFO, "Samples of this format are needed to improve support. Please contact the developers.\n");
+ sh->i_bps = sh->channels * sh->samplerate * 5 / 2;
+ case 2:
+ sh->sample_format = AF_FORMAT_S24_BE;
+ sh->samplesize = 3;
+ break;
+ default:
+ sh->sample_format = AF_FORMAT_S16_BE;
+ sh->samplesize = 2;
+ }
+ } else {
+ // use defaults:
+ sh->channels=2;
+ sh->samplerate=48000;
+ sh->sample_format = AF_FORMAT_S16_BE;
+ sh->samplesize = 2;
+ }
+ if (!sh->i_bps)
+ sh->i_bps = sh->samplesize * sh->channels * sh->samplerate;
+ return 1;
+}
+
+static int preinit(sh_audio_t *sh)
+{
+ sh->audio_out_minsize=2048;
+ return 1;
+}
+
+static void uninit(sh_audio_t *sh)
+{
+}
+
+static int control(sh_audio_t *sh,int cmd,void* arg, ...)
+{
+ int skip;
+ switch(cmd)
+ {
+ case ADCTRL_SKIP_FRAME:
+ skip=sh->i_bps/16;
+ skip=skip&(~3);
+ demux_read_data(sh->ds,NULL,skip);
+ return CONTROL_TRUE;
+ }
+ return CONTROL_UNKNOWN;
+}
+
+static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
+{
+ int j,len;
+ if (sh_audio->samplesize == 3) {
+ if (((sh_audio->codecdata[1] >> 6) & 3) == 1) {
+ // 20 bit
+ // not sure if the "& 0xf0" and "<< 4" are the right way around
+ // can somebody clarify?
+ for (j = 0; j < minlen; j += 12) {
+ char tmp[10];
+ len = demux_read_data(sh_audio->ds, tmp, 10);
+ if (len < 10) break;
+ // first sample
+ buf[j + 0] = tmp[0];
+ buf[j + 1] = tmp[1];
+ buf[j + 2] = tmp[8] & 0xf0;
+ // second sample
+ buf[j + 3] = tmp[2];
+ buf[j + 4] = tmp[3];
+ buf[j + 5] = tmp[8] << 4;
+ // third sample
+ buf[j + 6] = tmp[4];
+ buf[j + 7] = tmp[5];
+ buf[j + 8] = tmp[9] & 0xf0;
+ // fourth sample
+ buf[j + 9] = tmp[6];
+ buf[j + 10] = tmp[7];
+ buf[j + 11] = tmp[9] << 4;
+ }
+ len = j;
+ } else {
+ // 24 bit
+ for (j = 0; j < minlen; j += 12) {
+ char tmp[12];
+ len = demux_read_data(sh_audio->ds, tmp, 12);
+ if (len < 12) break;
+ // first sample
+ buf[j + 0] = tmp[0];
+ buf[j + 1] = tmp[1];
+ buf[j + 2] = tmp[8];
+ // second sample
+ buf[j + 3] = tmp[2];
+ buf[j + 4] = tmp[3];
+ buf[j + 5] = tmp[9];
+ // third sample
+ buf[j + 6] = tmp[4];
+ buf[j + 7] = tmp[5];
+ buf[j + 8] = tmp[10];
+ // fourth sample
+ buf[j + 9] = tmp[6];
+ buf[j + 10] = tmp[7];
+ buf[j + 11] = tmp[11];
+ }
+ len = j;
+ }
+ } else
+ len=demux_read_data(sh_audio->ds,buf,(minlen+3)&(~3));
+ return len;
+}