#include <vlc_demux.h>
#include <vlc_aout.h>
#include <vlc_codecs.h>
+#include <vlc_charset.h>
#include <limits.h>
+#define TEMPO_MIN 20
+#define TEMPO_MAX 250 /* Beats per minute */
+
static int Open (vlc_object_t *);
static void Close (vlc_object_t *);
p_demux->pf_control = Control;
p_demux->p_sys = p_sys;
- /* SMF expresses tempo in Beats-Per-Minute, default is 120 */
- date_Init (&p_sys->pts, ppqn * 120, 60);
+ /* Default SMF tempo is 120BPM, i.e. half a second per quarter note */
+ date_Init (&p_sys->pts, ppqn * 2, 1);
date_Set (&p_sys->pts, 1);
p_sys->pulse = 0;
p_sys->ppqn = ppqn;
}
+/**
+ * Non-MIDI Meta events handler
+ */
+static
+int HandleMeta (demux_t *p_demux, mtrk_t *tr)
+{
+ stream_t *s = p_demux->s;
+ demux_sys_t *p_sys = p_demux->p_sys;
+ uint8_t *payload;
+ uint8_t type;
+ int32_t length;
+ int ret = 0;
+
+ if (stream_Read (s, &type, 1) != 1)
+ return -1;
+
+ length = ReadVarInt (s);
+ if (length < 0)
+ return -1;
+
+ payload = malloc (length + 1);
+ if ((payload == NULL)
+ || (stream_Read (s, payload, length) != length))
+ {
+ free (payload);
+ return -1;
+ }
+
+ payload[length] = '\0';
+
+ switch (type)
+ {
+ case 0x00: /* Sequence Number */
+ break;
+
+ case 0x01: /* Test (comment) */
+ EnsureUTF8 ((char *)payload);
+ msg_Info (p_demux, "Text : %s", (char *)payload);
+ break;
+
+ case 0x02: /* Copyright */
+ EnsureUTF8 ((char *)payload);
+ msg_Info (p_demux, "Copyright : %s", (char *)payload);
+ break;
+
+ case 0x03: /* Track name */
+ EnsureUTF8 ((char *)payload);
+ msg_Info (p_demux, "Track name: %s", (char *)payload);
+ break;
+
+ case 0x04: /* Instrument name */
+ EnsureUTF8 ((char *)payload);
+ msg_Info (p_demux, "Instrument: %s", (char *)payload);
+ break;
+
+ case 0x05: /* Lyric (one syllable) */
+ /*EnsureUTF8 ((char *)payload);*/
+ break;
+
+ case 0x06: /* Marker text */
+ EnsureUTF8 ((char *)payload);
+ msg_Info (p_demux, "Marker : %s", (char *)payload);
+
+ case 0x07: /* Cue point (WAVE filename) */
+ EnsureUTF8 ((char *)payload);
+ msg_Info (p_demux, "Cue point : %s", (char *)payload);
+ break;
+
+ case 0x08: /* Program/Patch name */
+ EnsureUTF8 ((char *)payload);
+ msg_Info (p_demux, "Patch name: %s", (char *)payload);
+ break;
+
+ case 0x09: /* MIDI port name */
+ EnsureUTF8 ((char *)payload);
+ msg_Dbg (p_demux, "MIDI port : %s", (char *)payload);
+ break;
+
+ case 0x2F: /* End of track */
+ if (tr->end != stream_Tell (s))
+ {
+ msg_Err (p_demux, "misplaced end of track");
+ ret = -1;
+ }
+ break;
+
+ case 0x51: /* Tempo */
+ if (length == 3)
+ {
+ uint32_t uspqn = (payload[0] << 16)
+ | (payload[1] << 8) | payload[2];
+ unsigned tempo = 60 * 1000000 / (uspqn ? uspqn : 1);
+ msg_Dbg (p_demux, "tempo: %uus/qn -> %u BPM",
+ (unsigned)uspqn, tempo);
+
+ if (tempo < TEMPO_MIN)
+ {
+ msg_Warn (p_demux, "tempo too slow -> %u BPM", TEMPO_MIN);
+ tempo = TEMPO_MIN;
+ }
+ else
+ if (tempo > TEMPO_MAX)
+ {
+ msg_Warn (p_demux, "tempo too fast -> %u BPM", TEMPO_MAX);
+ tempo = TEMPO_MAX;
+ }
+ date_Change (&p_sys->pts, p_sys->ppqn * tempo, 60);
+ }
+ else
+ ret = -1;
+ break;
+
+ case 0x54: /* SMPTE offset */
+ if (length == 5)
+ msg_Warn (p_demux, "SMPTE offset not implemented");
+ else
+ ret = -1;
+ break;
+
+ case 0x58: /* Time signature */
+ if (length == 4)
+ ;
+ else
+ ret = -1;
+ break;
+
+ case 0x59: /* Key signature */
+ if (length == 2)
+ ;
+ else
+ ret = -1;
+ break;
+
+ case 0x7f: /* Proprietary event */
+ msg_Dbg (p_demux, "ignored proprietary SMF Meta Event (%d bytes)",
+ length);
+ break;
+
+ default:
+ msg_Warn (p_demux, "unknown SMF Meta Event type 0x%02X (%d bytes)",
+ type, length);
+ }
+
+ free (payload);
+ return 0;
+}
+
+
+
static
int HandleMessage (demux_t *p_demux, mtrk_t *tr)
{
}
}
case 0xFF: /* SMF Meta Event */
- {
- uint8_t type;
- int32_t length;
-
- if (stream_Read (s, &type, 1) != 1)
- return -1;
- length = ReadVarInt (s);
- if (length < 0)
- return -1;
-
- msg_Warn (p_demux,
- "unknown SMF Meta Event type 0x%02X (%d bytes)",
- type, length);
- /* TODO: parse these */
- if (stream_Read (s, NULL, length) != length)
+ if (HandleMeta (p_demux, tr))
return -1;
-
/* We MUST NOT pass this event to forward. It would be
* confused as a MIDI Reset real-time event. */
goto skip;
- }
case 0xF1:
case 0xF3:
datalen = 1;
next_pulse = track->next;
}
+ mtime_t cur_tick = (date_Get (&p_sys->pts) + 9999) / 10000, last_tick;
if (next_pulse != UINT64_MAX)
- date_Increment (&p_sys->pts, next_pulse - pulse);
+ last_tick = date_Increment (&p_sys->pts, next_pulse - pulse) / 10000;
+ else
+ last_tick = cur_tick + 1;
+
+ /* MIDI Tick emulation (ping the decider every 10ms) */
+ while (cur_tick < last_tick)
+ {
+ block_t *tick = block_New (p_demux, 1);
+ if (tick == NULL)
+ break;
+
+ tick->p_buffer[0] = 0xF9;
+ tick->i_dts = tick->i_pts = cur_tick++ * 10000;
+ es_out_Send (p_demux->out, p_sys->es, tick);
+ }
+
p_sys->pulse = next_pulse;
return 1;
projects / vlc / blobdiff