* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
-#include <vlc/vlc.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
#include <vlc_demux.h>
#include <vlc_aout.h>
-#include <vlc_codecs.h>
+#include <vlc_charset.h>
#include <limits.h>
+#include <assert.h>
+
+#define TEMPO_MIN 20
+#define TEMPO_MAX 250 /* Beats per minute */
+
static int Open (vlc_object_t *);
static void Close (vlc_object_t *);
-vlc_module_begin ();
- set_description (_("SMF demuxer"));
- set_category (CAT_INPUT);
- set_subcategory (SUBCAT_INPUT_DEMUX);
- set_capability ("demux2", 20);
- set_callbacks (Open, Close);
-vlc_module_end ();
+vlc_module_begin ()
+ set_description (N_("SMF demuxer"))
+ set_category (CAT_INPUT)
+ set_subcategory (SUBCAT_INPUT_DEMUX)
+ set_capability ("demux", 20)
+ set_callbacks (Open, Close)
+vlc_module_end ()
static int Demux (demux_t *);
static int Control (demux_t *, int i_query, va_list args);
demux_sys_t *p_sys;
const uint8_t *peek;
unsigned tracks, ppqn;
- vlc_bool_t multitrack;
+ bool multitrack;
/* (Try to) parse the SMF header */
/* Header chunk always has 6 bytes payload */
if (stream_Peek (stream, &peek, 14) < 14)
return VLC_EGENERIC;
+ /* Skip RIFF MIDI header if present */
+ if (!memcmp (peek, "RIFF", 4) && !memcmp (peek + 8, "RMID", 4))
+ {
+ uint32_t riff_len = GetDWLE (peek + 4);
+
+ msg_Dbg (p_this, "detected RIFF MIDI file (%u bytes)",
+ (unsigned)riff_len);
+ if ((stream_Read (stream, NULL, 12) < 12))
+ return VLC_EGENERIC;
+
+ /* Look for the RIFF data chunk */
+ for (;;)
+ {
+ char chnk_hdr[8];
+ uint32_t chnk_len;
+
+ if ((riff_len < 8)
+ || (stream_Read (stream, chnk_hdr, 8) < 8))
+ return VLC_EGENERIC;
+
+ riff_len -= 8;
+ chnk_len = GetDWLE (chnk_hdr + 4);
+ if (riff_len < chnk_len)
+ return VLC_EGENERIC;
+ riff_len -= chnk_len;
+
+ if (!memcmp (chnk_hdr, "data", 4))
+ break; /* found! */
+
+ if (stream_Read (stream, NULL, chnk_len) < (ssize_t)chnk_len)
+ return VLC_EGENERIC;
+ }
+
+ /* Read real SMF header. Assume RIFF data chunk length is proper. */
+ if (stream_Peek (stream, &peek, 14) < 14)
+ return VLC_EGENERIC;
+ }
+
if (memcmp (peek, "MThd\x00\x00\x00\x06", 8))
return VLC_EGENERIC;
peek += 8;
switch (GetWBE (peek))
{
case 0:
- multitrack = VLC_FALSE;
+ multitrack = false;
break;
case 1:
- multitrack = VLC_TRUE;
+ multitrack = true;
break;
default:
/* We don't implement SMF2 (as do many) */
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);
- date_Set (&p_sys->pts, 1);
+ /* 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, 0);
p_sys->pulse = 0;
p_sys->ppqn = ppqn;
p_sys->trackv[i].offset = stream_Tell (stream);
p_sys->trackv[i].end = p_sys->trackv[i].offset + GetDWBE (head + 4);
- msg_Dbg (p_this, "track %u: 0x"I64Fx"-0x"I64Fx, i,
- p_sys->trackv[i].offset, p_sys->trackv[i].end);
p_sys->trackv[i].next = 0;
ReadDeltaTime (stream, p_sys->trackv + i);
p_sys->trackv[i].running_event = 0xF6;
}
es_format_t fmt;
- es_format_Init (&fmt, AUDIO_ES, VLC_FOURCC('M', 'I', 'D', 'I'));
+ es_format_Init (&fmt, AUDIO_ES, VLC_CODEC_MIDI);
+ fmt.audio.i_channels = 2;
+ fmt.audio.i_original_channels = fmt.audio.i_physical_channels =
+ AOUT_CHAN_LEFT | AOUT_CHAN_RIGHT;
+ fmt.audio.i_rate = 44100; /* dummy value */
p_sys->es = es_out_Add (p_demux->out, &fmt);
return VLC_SUCCESS;
}
+/**
+ * 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: /* Text (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 ret;
+}
+
+
+
static
int HandleMessage (demux_t *p_demux, mtrk_t *tr)
{
case 0xF0: /* System Exclusive */
switch (event)
{
- case 0xF0: /* System Specific */
+ case 0xF0: /* System Specific start */
+ case 0xF7: /* System Specific continuation */
{
- /* TODO: don't skip these */
- stream_Read (s, NULL, 1); /* Manuf ID */
- for (;;)
- {
- uint8_t c;
- if (stream_Read (s, &c, 1) != 1)
- return -1;
- if (c == 0xF7)
- goto skip;
- }
- }
- case 0xFF: /* SMF Meta Event */
- {
- uint8_t type;
- int32_t length;
+ /* Variable length followed by SysEx event data */
+ int32_t len = ReadVarInt (s);
+ if (len == -1)
+ return -1;
- if (stream_Read (s, &type, 1) != 1)
+ block = stream_Block (s, len);
+ if (block == NULL)
return -1;
- length = ReadVarInt (s);
- if (length < 0)
+ block = block_Realloc (block, 1, len);
+ if (block == NULL)
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)
+ block->p_buffer[0] = event;
+ goto send;
+ }
+ case 0xFF: /* SMF Meta Event */
+ if (HandleMeta (p_demux, tr))
return -1;
-
- /* We MUST NOT pass this event to forward. It would be
+ /* We MUST NOT pass this event forward. It would be
* confused as a MIDI Reset real-time event. */
goto skip;
- }
case 0xF1:
case 0xF3:
datalen = 1;
/* We cannot handle undefined "common" (non-real-time)
* events inside SMF, as we cannot differentiate a
* one byte delta-time (< 0x80) from event data. */
- case 0xF7: /* End of sysex -> should never happen(?) */
- msg_Err (p_demux, "unknown MIDI event 0x%02X", event);
- return -1; /* undefined events */
default:
datalen = 0;
break;
}
+ break;
case 0xC0:
case 0xD0:
datalen = 1;
stream_Read (s, block->p_buffer + 2, datalen - 1);
}
- block->i_dts = block->i_pts = date_Get (&p_demux->p_sys->pts);
+send:
+ block->i_dts = block->i_pts = VLC_TS_0 + date_Get (&p_demux->p_sys->pts);
es_out_Send (p_demux->out, p_demux->p_sys->es, block);
skip:
if (pulse == UINT64_MAX)
return 0; /* all tracks are done */
- es_out_Control (p_demux->out, ES_OUT_SET_PCR, date_Get (&p_sys->pts));
+ es_out_Control (p_demux->out, ES_OUT_SET_PCR, VLC_TS_0 + date_Get (&p_sys->pts));
for (unsigned i = 0; i < p_sys->trackc; i++)
{
while (track->next == pulse)
{
- msg_Dbg (p_demux, "event on track %u", i);
if (HandleMessage (p_demux, track)
|| ReadDeltaTime (s, track))
{
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 decoder 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 = VLC_TS_0 + cur_tick++ * 10000;
+ es_out_Send (p_demux->out, p_sys->es, tick);
+ }
+
p_sys->pulse = next_pulse;
return 1;
*****************************************************************************/
static int Control (demux_t *p_demux, int i_query, va_list args)
{
- return demux2_vaControlHelper (p_demux->s, 0, -1, 0, 1, i_query, args);
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ switch (i_query)
+ {
+ case DEMUX_GET_TIME:
+ {
+ *(va_arg (args, int64_t *)) = date_Get (&p_sys->pts);
+ return 0;
+ }
+#if 0
+ /* TODO: */
+ case DEMUX_SET_TIME:
+ case DEMUX_GET_POSITION:
+ case DEMUX_SET_POSITION:
+ case DEMUX_GET_LENGTH:
+#endif
+ }
+ return VLC_EGENERIC;
}
projects / vlc / blobdiff