blob: 24a0e2dd329072f3bf642a66006b4384049d365c [file] [log] [blame]
/* GStreamer libsndfile plugin
* Copyright (C) 2013 Stefan Sauer <ensonic@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with self library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <gst/gst-i18n-plugin.h>
#include <gst/audio/audio.h>
#include "gstsfdec.h"
#define FORMATS \
"{ "GST_AUDIO_NE (F32)", "GST_AUDIO_NE (S32)", "GST_AUDIO_NE (S16)" }"
static GstStaticPadTemplate sf_dec_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw, "
"format = (string) " FORMATS ", "
"layout = (string) interleaved, "
"rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ]"));
GST_DEBUG_CATEGORY_STATIC (gst_sf_dec_debug);
#define GST_CAT_DEFAULT gst_sf_dec_debug
#define DEFAULT_BUFFER_FRAMES (256)
static gboolean gst_sf_dec_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_sf_dec_src_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstStateChangeReturn gst_sf_dec_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_sf_dec_sink_activate (GstPad * pad, GstObject * parent);
static gboolean gst_sf_dec_sink_activate_mode (GstPad * sinkpad,
GstObject * parent, GstPadMode mode, gboolean active);
static void gst_sf_dec_loop (GstPad * pad);
static gboolean gst_sf_dec_start (GstSFDec * bsrc);
static gboolean gst_sf_dec_stop (GstSFDec * bsrc);
#define _do_init \
GST_DEBUG_CATEGORY_INIT (gst_sf_dec_debug, "sfdec", 0, "sfdec element");
#define gst_sf_dec_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstSFDec, gst_sf_dec, GST_TYPE_ELEMENT, _do_init);
/* sf virtual io */
static sf_count_t
gst_sf_vio_get_filelen (void *user_data)
{
GstSFDec *self = GST_SF_DEC (user_data);
gint64 dur;
if (gst_pad_peer_query_duration (self->sinkpad, GST_FORMAT_BYTES, &dur)) {
return (sf_count_t) dur;
}
GST_WARNING_OBJECT (self, "query_duration failed");
return -1;
}
static sf_count_t
gst_sf_vio_tell (void *user_data)
{
GstSFDec *self = GST_SF_DEC (user_data);
return self->pos;
}
static sf_count_t
gst_sf_vio_seek (sf_count_t offset, int whence, void *user_data)
{
GstSFDec *self = GST_SF_DEC (user_data);
switch (whence) {
case SEEK_CUR:
self->pos += offset;
break;
case SEEK_SET:
self->pos = offset;
break;
case SEEK_END:
self->pos = gst_sf_vio_get_filelen (user_data) - offset;
break;
}
return (sf_count_t) self->pos;
}
static sf_count_t
gst_sf_vio_read (void *ptr, sf_count_t count, void *user_data)
{
GstSFDec *self = GST_SF_DEC (user_data);
GstBuffer *buffer = gst_buffer_new_wrapped_full (0, ptr, count, 0, count,
ptr, NULL);
if (gst_pad_pull_range (self->sinkpad, self->pos, count, &buffer) ==
GST_FLOW_OK) {
GST_DEBUG_OBJECT (self, "read %d bytes @ pos %" G_GUINT64_FORMAT,
(gint) count, self->pos);
self->pos += count;
return count;
}
GST_WARNING_OBJECT (self, "read failed");
return 0;
}
static sf_count_t
gst_sf_vio_write (const void *ptr, sf_count_t count, void *user_data)
{
GstSFDec *self = GST_SF_DEC (user_data);
GstBuffer *buffer = gst_buffer_new_wrapped (g_memdup (ptr, count), count);
if (gst_pad_push (self->srcpad, buffer) == GST_FLOW_OK) {
return count;
}
GST_WARNING_OBJECT (self, "write failed");
return 0;
}
SF_VIRTUAL_IO gst_sf_vio = {
&gst_sf_vio_get_filelen,
&gst_sf_vio_seek,
&gst_sf_vio_read,
&gst_sf_vio_write,
&gst_sf_vio_tell,
};
static void
gst_sf_dec_class_init (GstSFDecClass * klass)
{
GstElementClass *gstelement_class;
gstelement_class = GST_ELEMENT_CLASS (klass);
gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_sf_dec_change_state);
gst_element_class_set_static_metadata (gstelement_class, "Sndfile decoder",
"Decoder/Audio",
"Read audio streams using libsndfile",
"Stefan Sauer <ensonic@user.sf.net>");
gst_element_class_add_static_pad_template (gstelement_class,
&sf_dec_src_factory);
gst_element_class_add_pad_template (gstelement_class,
gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_sf_create_audio_template_caps ()));
}
static void
gst_sf_dec_init (GstSFDec * self)
{
self->sinkpad = gst_pad_new_from_template (gst_element_class_get_pad_template
(GST_ELEMENT_GET_CLASS (self), "sink"), "sink");
gst_pad_set_activate_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_sf_dec_sink_activate));
gst_pad_set_activatemode_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_sf_dec_sink_activate_mode));
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->srcpad = gst_pad_new_from_static_template (&sf_dec_src_factory, "src");
gst_pad_set_event_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_sf_dec_src_event));
gst_pad_set_query_function (self->srcpad,
GST_DEBUG_FUNCPTR (gst_sf_dec_src_query));
gst_element_add_pad (GST_ELEMENT (self), self->srcpad);
}
static gboolean
gst_sf_dec_do_seek (GstSFDec * self, GstEvent * event)
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type, stop_type;
gboolean flush;
gint64 cur, stop, pos;
GstSegment seg;
guint64 song_length = gst_util_uint64_scale_int (self->duration, GST_SECOND,
self->rate);
gst_event_parse_seek (event, &rate, &format, &flags, &cur_type, &cur,
&stop_type, &stop);
if (format != GST_FORMAT_TIME)
goto unsupported_format;
/* FIXME: we should be using GstSegment for all this */
if (cur_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE)
goto unsupported_type;
if (stop_type == GST_SEEK_TYPE_NONE)
stop = GST_CLOCK_TIME_NONE;
if (!GST_CLOCK_TIME_IS_VALID (stop) && song_length > 0)
stop = song_length;
cur = CLAMP (cur, -1, song_length);
/* cur -> pos */
pos = gst_util_uint64_scale_int (cur, self->rate, GST_SECOND);
if ((pos = sf_seek (self->file, pos, SEEK_SET) == -1))
goto seek_failed;
/* pos -> cur */
cur = gst_util_uint64_scale_int (pos, GST_SECOND, self->rate);
GST_DEBUG_OBJECT (self, "seek to %" GST_TIME_FORMAT,
GST_TIME_ARGS ((guint64) cur));
flush = ((flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH);
if (flush) {
gst_pad_push_event (self->srcpad, gst_event_new_flush_start ());
} else {
gst_pad_stop_task (self->sinkpad);
}
GST_PAD_STREAM_LOCK (self->sinkpad);
if (flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT (self),
gst_message_new_segment_start (GST_OBJECT (self), format, cur));
}
if (flush) {
gst_pad_push_event (self->srcpad, gst_event_new_flush_stop (TRUE));
}
GST_LOG_OBJECT (self, "sending newsegment from %" GST_TIME_FORMAT "-%"
GST_TIME_FORMAT ", pos=%" GST_TIME_FORMAT,
GST_TIME_ARGS ((guint64) cur), GST_TIME_ARGS ((guint64) stop),
GST_TIME_ARGS ((guint64) cur));
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.rate = rate;
seg.start = cur;
seg.stop = stop;
seg.time = cur;
gst_pad_push_event (self->srcpad, gst_event_new_segment (&seg));
gst_pad_start_task (self->sinkpad,
(GstTaskFunction) gst_sf_dec_loop, self, NULL);
GST_PAD_STREAM_UNLOCK (self->sinkpad);
return TRUE;
/* ERROR */
unsupported_format:
{
GST_DEBUG_OBJECT (self, "seeking is only supported in TIME format");
return FALSE;
}
unsupported_type:
{
GST_DEBUG_OBJECT (self, "unsupported seek type");
return FALSE;
}
seek_failed:
{
GST_DEBUG_OBJECT (self, "seek failed");
return FALSE;
}
}
static gboolean
gst_sf_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstSFDec *self = GST_SF_DEC (parent);
gboolean res = FALSE;
GST_DEBUG_OBJECT (self, "event %s, %" GST_PTR_FORMAT,
GST_EVENT_TYPE_NAME (event), event);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
if (!self->file || !self->seekable)
goto done;
res = gst_sf_dec_do_seek (self, event);
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
done:
GST_DEBUG_OBJECT (self, "event %s: %d", GST_EVENT_TYPE_NAME (event), res);
return res;
}
static gboolean
gst_sf_dec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstSFDec *self = GST_SF_DEC (parent);
GstFormat format;
gboolean res = FALSE;
GST_DEBUG_OBJECT (self, "query %s, %" GST_PTR_FORMAT,
GST_QUERY_TYPE_NAME (query), query);
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
if (!self->file)
goto done;
gst_query_parse_duration (query, &format, NULL);
if (format == GST_FORMAT_TIME) {
gst_query_set_duration (query, format,
gst_util_uint64_scale_int (self->duration, GST_SECOND, self->rate));
res = TRUE;
}
break;
case GST_QUERY_POSITION:
if (!self->file)
goto done;
gst_query_parse_position (query, &format, NULL);
if (format == GST_FORMAT_TIME) {
gst_query_set_position (query, format,
gst_util_uint64_scale_int (self->pos, GST_SECOND, self->rate));
res = TRUE;
}
break;
default:
res = gst_pad_query_default (pad, parent, query);
break;
}
done:
GST_DEBUG_OBJECT (self, "query %s: %d", GST_QUERY_TYPE_NAME (query), res);
return res;
}
static GstStateChangeReturn
gst_sf_dec_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstSFDec *self = GST_SF_DEC (element);
GST_INFO_OBJECT (self, "transition: %s -> %s",
gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_sf_dec_start (self);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_sf_dec_stop (self);
break;
default:
break;
}
return ret;
}
static gboolean
gst_sf_dec_start (GstSFDec * self)
{
return TRUE;
}
static gboolean
gst_sf_dec_stop (GstSFDec * self)
{
int err = 0;
GST_INFO_OBJECT (self, "Closing sndfile stream");
if (self->file && (err = sf_close (self->file)))
goto close_failed;
self->file = NULL;
self->offset = 0;
self->channels = 0;
self->rate = 0;
self->pos = 0;
self->duration = 0;
return TRUE;
close_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, CLOSE,
("Could not close sndfile stream."),
("soundfile error: %s", sf_error_number (err)));
return FALSE;
}
}
static gboolean
gst_sf_dec_sink_activate (GstPad * sinkpad, GstObject * parent)
{
GstQuery *query;
gboolean pull_mode;
query = gst_query_new_scheduling ();
if (!gst_pad_peer_query (sinkpad, query)) {
gst_query_unref (query);
goto activate_push;
}
pull_mode = gst_query_has_scheduling_mode_with_flags (query,
GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
gst_query_unref (query);
if (!pull_mode)
goto activate_push;
GST_DEBUG_OBJECT (sinkpad, "activating pull");
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
activate_push:
{
GST_DEBUG_OBJECT (sinkpad, "activating push");
return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
}
}
static gboolean
gst_sf_dec_sink_activate_mode (GstPad * sinkpad, GstObject * parent,
GstPadMode mode, gboolean active)
{
gboolean res;
switch (mode) {
case GST_PAD_MODE_PUSH:
res = FALSE; /* no push support */
break;
case GST_PAD_MODE_PULL:
if (active) {
/* if we have a scheduler we can start the task */
GST_DEBUG_OBJECT (sinkpad, "start task");
res = gst_pad_start_task (sinkpad, (GstTaskFunction) gst_sf_dec_loop,
sinkpad, NULL);
} else {
res = gst_pad_stop_task (sinkpad);
}
break;
default:
res = FALSE;
break;
}
return res;
}
static void
create_and_send_tags (GstSFDec * self, SF_INFO * info, SF_LOOP_INFO * loop_info,
SF_INSTRUMENT * instrument)
{
GstTagList *tags;
const gchar *tag;
const gchar *codec_name;
/* send tags */
tags = gst_tag_list_new_empty ();
if ((tag = sf_get_string (self->file, SF_STR_TITLE)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_TITLE, tag, NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_COMMENT)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_COMMENT, tag, NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_ARTIST)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_ARTIST, tag, NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_ALBUM)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_ALBUM, tag, NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_GENRE)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_GENRE, tag, NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_COPYRIGHT)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_COPYRIGHT, tag, NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_LICENSE)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_LICENSE, tag, NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_SOFTWARE)) && *tag) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_APPLICATION_NAME, tag,
NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_TRACKNUMBER)) && *tag) {
guint track = atoi (tag);
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_TRACK_NUMBER, track,
NULL);
}
if ((tag = sf_get_string (self->file, SF_STR_DATE)) && *tag) {
GValue tag_val = { 0, };
GType tag_type = gst_tag_get_type (GST_TAG_DATE_TIME);
g_value_init (&tag_val, tag_type);
if (gst_value_deserialize (&tag_val, tag)) {
gst_tag_list_add_value (tags, GST_TAG_MERGE_APPEND, GST_TAG_DATE_TIME,
&tag_val);
} else {
GST_WARNING_OBJECT (self, "could not deserialize '%s' into a "
"tag %s of type %s", tag, GST_TAG_DATE_TIME, g_type_name (tag_type));
}
g_value_unset (&tag_val);
}
if (loop_info) {
if (loop_info->bpm != 0.0) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_BEATS_PER_MINUTE,
(gdouble) loop_info->bpm, NULL);
}
if (loop_info->root_key != -1) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_MIDI_BASE_NOTE,
(guint) loop_info->root_key, NULL);
}
}
if (instrument) {
gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_MIDI_BASE_NOTE,
(guint) instrument->basenote, NULL);
}
/* TODO: calculate bitrate: GST_TAG_BITRATE */
switch (info->format & SF_FORMAT_SUBMASK) {
case SF_FORMAT_PCM_S8:
case SF_FORMAT_PCM_16:
case SF_FORMAT_PCM_24:
case SF_FORMAT_PCM_32:
case SF_FORMAT_PCM_U8:
codec_name = "Uncompressed PCM audio";
break;
case SF_FORMAT_FLOAT:
case SF_FORMAT_DOUBLE:
codec_name = "Uncompressed IEEE float audio";
break;
case SF_FORMAT_ULAW:
codec_name = "ยต-law audio";
break;
case SF_FORMAT_ALAW:
codec_name = "A-law audio";
break;
case SF_FORMAT_IMA_ADPCM:
case SF_FORMAT_MS_ADPCM:
case SF_FORMAT_VOX_ADPCM:
case SF_FORMAT_G721_32:
case SF_FORMAT_G723_24:
case SF_FORMAT_G723_40:
codec_name = "ADPCM audio";
break;
case SF_FORMAT_GSM610:
codec_name = "MS GSM audio";
break;
case SF_FORMAT_DWVW_12:
case SF_FORMAT_DWVW_16:
case SF_FORMAT_DWVW_24:
case SF_FORMAT_DWVW_N:
codec_name = "Delta Width Variable Word encoded audio";
break;
case SF_FORMAT_DPCM_8:
case SF_FORMAT_DPCM_16:
codec_name = "differential PCM audio";
break;
case SF_FORMAT_VORBIS:
codec_name = "Vorbis";
break;
default:
codec_name = NULL;
GST_WARNING_OBJECT (self, "unmapped codec_type: %d",
info->format & SF_FORMAT_SUBMASK);
break;
}
if (codec_name) {
gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_AUDIO_CODEC,
codec_name, NULL);
}
if (!gst_tag_list_is_empty (tags)) {
GST_DEBUG_OBJECT (self, "have tags");
gst_pad_push_event (self->srcpad, gst_event_new_tag (tags));
} else {
gst_tag_list_unref (tags);
}
}
static gboolean
is_valid_loop (gint mode, guint start, guint end)
{
if (!end)
return FALSE;
if (start >= end)
return FALSE;
if (!mode)
return FALSE;
return TRUE;
}
static void
create_and_send_toc (GstSFDec * self, SF_INFO * info, SF_LOOP_INFO * loop_info,
SF_INSTRUMENT * instrument)
{
GstToc *toc;
GstTocEntry *entry = NULL, *subentry = NULL;
gint64 start, stop;
gchar *id;
gint i;
gboolean have_loops = FALSE;
if (!instrument)
return;
for (i = 0; i < 16; i++) {
if (is_valid_loop (instrument->loops[i].mode, instrument->loops[i].start,
instrument->loops[i].end)) {
have_loops = TRUE;
break;
}
}
if (!have_loops) {
GST_INFO_OBJECT (self, "Have no loops");
return;
}
toc = gst_toc_new (GST_TOC_SCOPE_GLOBAL);
GST_DEBUG_OBJECT (self, "have toc");
/* add cue edition */
entry = gst_toc_entry_new (GST_TOC_ENTRY_TYPE_EDITION, "loops");
stop = gst_util_uint64_scale_int (self->duration, GST_SECOND, self->rate);
gst_toc_entry_set_start_stop_times (entry, 0, stop);
gst_toc_append_entry (toc, entry);
for (i = 0; i < 16; i++) {
GST_DEBUG_OBJECT (self,
"loop[%2d]: mode=%d, start=%u, end=%u, count=%u", i,
instrument->loops[i].mode, instrument->loops[i].start,
instrument->loops[i].end, instrument->loops[i].count);
if (is_valid_loop (instrument->loops[i].mode, instrument->loops[i].start,
instrument->loops[i].end)) {
id = g_strdup_printf ("%08x", i);
subentry = gst_toc_entry_new (GST_TOC_ENTRY_TYPE_CHAPTER, id);
g_free (id);
start = gst_util_uint64_scale_int (instrument->loops[i].start,
GST_SECOND, self->rate);
stop = gst_util_uint64_scale_int (instrument->loops[i].end,
GST_SECOND, self->rate);
gst_toc_entry_set_start_stop_times (subentry, start, stop);
gst_toc_entry_append_sub_entry (entry, subentry);
}
}
gst_pad_push_event (self->srcpad, gst_event_new_toc (toc, FALSE));
}
static gboolean
gst_sf_dec_open_file (GstSFDec * self)
{
SF_INFO info = { 0, };
SF_LOOP_INFO loop_info = { 0, };
SF_INSTRUMENT instrument = { 0, };
GstCaps *caps;
GstStructure *s;
GstSegment seg;
gint width;
const gchar *format;
gchar *stream_id;
gboolean have_loop_info = FALSE;
gboolean have_instrument = FALSE;
GST_DEBUG_OBJECT (self, "opening the stream");
if (!(self->file = sf_open_virtual (&gst_sf_vio, SFM_READ, &info, self)))
goto open_failed;
stream_id =
gst_pad_create_stream_id (self->srcpad, GST_ELEMENT_CAST (self), NULL);
gst_pad_push_event (self->srcpad, gst_event_new_stream_start (stream_id));
g_free (stream_id);
self->channels = info.channels;
self->rate = info.samplerate;
self->duration = info.frames;
self->seekable = info.seekable;
GST_DEBUG_OBJECT (self, "stream openend: channels=%d, rate=%d, seekable=%d",
info.channels, info.samplerate, info.seekable);
/* negotiate srcpad caps */
if ((caps = gst_pad_get_allowed_caps (self->srcpad)) == NULL) {
caps = gst_pad_get_pad_template_caps (self->srcpad);
}
caps = gst_caps_make_writable (caps);
GST_DEBUG_OBJECT (self, "allowed caps %" GST_PTR_FORMAT, caps);
s = gst_caps_get_structure (caps, 0);
gst_structure_set (s,
"channels", G_TYPE_INT, self->channels,
"rate", G_TYPE_INT, self->rate, NULL);
if (!gst_structure_fixate_field_string (s, "format", GST_AUDIO_NE (S16)))
GST_WARNING_OBJECT (self, "Failed to fixate format to S16NE");
caps = gst_caps_fixate (caps);
GST_DEBUG_OBJECT (self, "fixated caps %" GST_PTR_FORMAT, caps);
/* configure to output the negotiated format */
s = gst_caps_get_structure (caps, 0);
format = gst_structure_get_string (s, "format");
if (g_str_equal (format, GST_AUDIO_NE (S32))) {
self->reader = (GstSFReader) sf_readf_int;
width = 32;
} else if (g_str_equal (format, GST_AUDIO_NE (S16))) {
self->reader = (GstSFReader) sf_readf_short;
width = 16;
} else {
self->reader = (GstSFReader) sf_readf_float;
width = 32;
}
self->bytes_per_frame = width * self->channels / 8;
gst_pad_set_caps (self->srcpad, caps);
gst_caps_unref (caps);
/* push initial segment */
gst_segment_init (&seg, GST_FORMAT_TIME);
seg.stop = gst_util_uint64_scale_int (self->duration, GST_SECOND, self->rate);
gst_pad_push_event (self->srcpad, gst_event_new_segment (&seg));
/* get extra details */
if (sf_command (self->file, SFC_GET_LOOP_INFO, &loop_info,
sizeof (loop_info))) {
GST_DEBUG_OBJECT (self, "have loop info");
have_loop_info = TRUE;
}
if (sf_command (self->file, SFC_GET_INSTRUMENT, &instrument,
sizeof (instrument))) {
GST_DEBUG_OBJECT (self, "have instrument");
have_instrument = TRUE;
}
create_and_send_tags (self, &info, (have_loop_info ? &loop_info : NULL),
(have_instrument ? &instrument : NULL));
create_and_send_toc (self, &info, (have_loop_info ? &loop_info : NULL),
(have_instrument ? &instrument : NULL));
return TRUE;
open_failed:
{
GST_ELEMENT_ERROR (self, RESOURCE, OPEN_READ,
(_("Could not open sndfile stream for reading.")),
("soundfile error: %s", sf_strerror (NULL)));
return FALSE;
}
}
static void
gst_sf_dec_loop (GstPad * pad)
{
GstSFDec *self = GST_SF_DEC (GST_PAD_PARENT (pad));
GstBuffer *buf;
GstMapInfo map;
GstFlowReturn flow;
sf_count_t frames_read;
guint num_frames = 1024; /* arbitrary */
if (G_UNLIKELY (!self->file)) {
/* not started yet */
if (!gst_sf_dec_open_file (self))
goto pause;
}
buf = gst_buffer_new_and_alloc (self->bytes_per_frame * num_frames);
gst_buffer_map (buf, &map, GST_MAP_WRITE);
frames_read = self->reader (self->file, map.data, num_frames);
GST_LOG_OBJECT (self, "read %d / %d bytes = %d frames of audio",
(gint) frames_read, (gint) map.size, num_frames);
gst_buffer_unmap (buf, &map);
if (G_UNLIKELY (frames_read < 0))
goto could_not_read;
if (G_UNLIKELY (frames_read == 0))
goto eos;
GST_BUFFER_OFFSET (buf) = self->offset;
GST_BUFFER_TIMESTAMP (buf) = gst_util_uint64_scale_int (self->offset,
GST_SECOND, self->rate);
self->offset += frames_read;
GST_BUFFER_DURATION (buf) = gst_util_uint64_scale_int (self->offset,
GST_SECOND, self->rate) - GST_BUFFER_TIMESTAMP (buf);
flow = gst_pad_push (self->srcpad, buf);
if (flow != GST_FLOW_OK) {
GST_LOG_OBJECT (self, "pad push flow: %s", gst_flow_get_name (flow));
goto pause;
}
return;
/* ERROR */
could_not_read:
{
GST_ELEMENT_ERROR (self, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
gst_buffer_unref (buf);
goto pause;
}
eos:
{
GST_DEBUG_OBJECT (self, "EOS");
gst_buffer_unref (buf);
gst_pad_push_event (self->srcpad, gst_event_new_eos ());
goto pause;
}
pause:
{
GST_INFO_OBJECT (self, "Pausing");
gst_pad_pause_task (self->sinkpad);
}
}