gstreamer/gst/wavenc/gstwavenc.c

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/* -*- mOde: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */
/* GStreamer .wav encoder
* Copyright (C) <2002> Iain Holmes <iain@prettypeople.org>
* Copyright (C) <2006> Tim-Philipp Müller <tim centricular 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 this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
/**
* SECTION:element-wavenc
*
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* Format an audio stream into the wav format.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 cdparanoiasrc mode=continuous ! queue ! audioconvert ! wavenc ! filesink location=cd.wav
* ]| Rip a whole audio CD into a single wav file, with the track table written into a CUE sheet inside the file
* |[
* gst-launch-1.0 cdparanoiasrc track=5 ! queue ! audioconvert ! wavenc ! filesink location=track5.wav
* ]| Rip track 5 of an audio CD into a single wav file containing unencoded raw audio samples.
* </refsect2>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstwavenc.h"
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#include <gst/audio/audio.h>
#include <gst/riff/riff-media.h>
GST_DEBUG_CATEGORY_STATIC (wavenc_debug);
#define GST_CAT_DEFAULT wavenc_debug
struct riff_struct
{
guint8 id[4]; /* RIFF */
guint32 len;
guint8 wav_id[4]; /* WAVE */
};
struct chunk_struct
{
guint8 id[4];
guint32 len;
};
struct common_struct
{
guint16 wFormatTag;
guint16 wChannels;
guint32 dwSamplesPerSec;
guint32 dwAvgBytesPerSec;
guint16 wBlockAlign;
guint16 wBitsPerSample; /* Only for PCM */
};
struct wave_header
{
struct riff_struct riff;
struct chunk_struct format;
struct common_struct common;
struct chunk_struct data;
};
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typedef struct
{
/* Offset Size Description Value
* 0x00 4 ID unique identification value
* 0x04 4 Position play order position
* 0x08 4 Data Chunk ID RIFF ID of corresponding data chunk
* 0x0c 4 Chunk Start Byte Offset of Data Chunk *
* 0x10 4 Block Start Byte Offset to sample of First Channel
* 0x14 4 Sample Offset Byte Offset to sample byte of First Channel
*/
guint32 id;
guint32 position;
guint8 data_chunk_id[4];
guint32 chunk_start;
guint32 block_start;
guint32 sample_offset;
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} GstWavEncCue;
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typedef struct
{
/* Offset Size Description Value
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* 0x00 4 Chunk ID "labl" (0x6C61626C) or "note" (0x6E6F7465)
* 0x04 4 Chunk Data Size depends on contained text
* 0x08 4 Cue Point ID 0 - 0xFFFFFFFF
* 0x0c Text
*/
guint8 chunk_id[4];
guint32 chunk_data_size;
guint32 cue_point_id;
gchar *text;
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} GstWavEncLabl, GstWavEncNote;
/* FIXME: mono doesn't produce correct files it seems, at least mplayer xruns */
/* Max. of two channels, more channels need WAVFORMATEX with
* channel layout, which we do not support yet */
#define SINK_CAPS \
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"audio/x-raw, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) 1, " \
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"format = (string) { S32LE, S24LE, S16LE, U8, F32LE, F64LE }, " \
"layout = (string) interleaved" \
"; " \
"audio/x-raw, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) 2, " \
"channel-mask = (bitmask) 0x3, " \
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"format = (string) { S32LE, S24LE, S16LE, U8, F32LE, F64LE }, " \
"layout = (string) interleaved" \
"; " \
"audio/x-alaw, " \
"rate = (int) [ 8000, 192000 ], " \
"channels = (int) [ 1, 2 ], " \
"width = (int) 8, " \
"depth = (int) 8, " \
"signed = (boolean) false; " \
"audio/x-mulaw, " \
"rate = (int) [ 8000, 192000 ], " \
"channels = (int) [ 1, 2 ], " \
"width = (int) 8, " \
"depth = (int) 8, " \
"signed = (boolean) false"
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (SINK_CAPS)
);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-wav")
);
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#define gst_wavenc_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstWavEnc, gst_wavenc, GST_TYPE_ELEMENT,
G_IMPLEMENT_INTERFACE (GST_TYPE_TOC_SETTER, NULL)
);
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static GstFlowReturn gst_wavenc_chain (GstPad * pad, GstObject * parent,
GstBuffer * buf);
static gboolean gst_wavenc_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstStateChangeReturn gst_wavenc_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps);
static void
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gst_wavenc_class_init (GstWavEncClass * klass)
{
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GstElementClass *element_class;
element_class = (GstElementClass *) klass;
element_class->change_state = GST_DEBUG_FUNCPTR (gst_wavenc_change_state);
gst_element_class_set_static_metadata (element_class, "WAV audio muxer",
"Codec/Muxer/Audio",
"Encode raw audio into WAV", "Iain Holmes <iain@prettypeople.org>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
GST_DEBUG_CATEGORY_INIT (wavenc_debug, "wavenc", 0, "WAV encoder element");
}
static void
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gst_wavenc_init (GstWavEnc * wavenc)
{
wavenc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_chain_function (wavenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_wavenc_chain));
gst_pad_set_event_function (wavenc->sinkpad,
GST_DEBUG_FUNCPTR (gst_wavenc_event));
gst_pad_use_fixed_caps (wavenc->sinkpad);
gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->sinkpad);
wavenc->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_pad_use_fixed_caps (wavenc->srcpad);
gst_pad_set_caps (wavenc->srcpad,
gst_static_pad_template_get_caps (&src_factory));
gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->srcpad);
}
#define WAV_HEADER_LEN 44
static GstBuffer *
gst_wavenc_create_header_buf (GstWavEnc * wavenc, guint audio_data_size)
{
struct wave_header wave;
GstBuffer *buf;
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GstMapInfo map;
guint8 *header;
buf = gst_buffer_new_and_alloc (WAV_HEADER_LEN);
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gst_buffer_map (buf, &map, GST_MAP_WRITE);
header = map.data;
memset (header, 0, WAV_HEADER_LEN);
wave.common.wChannels = wavenc->channels;
wave.common.wBitsPerSample = wavenc->width;
wave.common.dwSamplesPerSec = wavenc->rate;
/* Fill out our wav-header with some information */
memcpy (wave.riff.id, "RIFF", 4);
wave.riff.len = audio_data_size + WAV_HEADER_LEN - 8;
memcpy (wave.riff.wav_id, "WAVE", 4);
memcpy (wave.format.id, "fmt ", 4);
wave.format.len = 16;
wave.common.wFormatTag = wavenc->format;
wave.common.wBlockAlign = (wavenc->width / 8) * wave.common.wChannels;
wave.common.dwAvgBytesPerSec =
wave.common.wBlockAlign * wave.common.dwSamplesPerSec;
memcpy (wave.data.id, "data", 4);
wave.data.len = audio_data_size;
memcpy (header, (char *) wave.riff.id, 4);
GST_WRITE_UINT32_LE (header + 4, wave.riff.len);
memcpy (header + 8, (char *) wave.riff.wav_id, 4);
memcpy (header + 12, (char *) wave.format.id, 4);
GST_WRITE_UINT32_LE (header + 16, wave.format.len);
GST_WRITE_UINT16_LE (header + 20, wave.common.wFormatTag);
GST_WRITE_UINT16_LE (header + 22, wave.common.wChannels);
GST_WRITE_UINT32_LE (header + 24, wave.common.dwSamplesPerSec);
GST_WRITE_UINT32_LE (header + 28, wave.common.dwAvgBytesPerSec);
GST_WRITE_UINT16_LE (header + 32, wave.common.wBlockAlign);
GST_WRITE_UINT16_LE (header + 34, wave.common.wBitsPerSample);
memcpy (header + 36, (char *) wave.data.id, 4);
GST_WRITE_UINT32_LE (header + 40, wave.data.len);
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gst_buffer_unmap (buf, &map);
return buf;
}
static GstFlowReturn
gst_wavenc_push_header (GstWavEnc * wavenc, guint audio_data_size)
{
GstFlowReturn ret;
GstBuffer *outbuf;
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GstSegment segment;
/* seek to beginning of file */
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gst_segment_init (&segment, GST_FORMAT_BYTES);
gst_pad_push_event (wavenc->srcpad, gst_event_new_segment (&segment));
GST_DEBUG_OBJECT (wavenc, "writing header with datasize=%u", audio_data_size);
outbuf = gst_wavenc_create_header_buf (wavenc, audio_data_size);
GST_BUFFER_OFFSET (outbuf) = 0;
ret = gst_pad_push (wavenc->srcpad, outbuf);
if (ret != GST_FLOW_OK) {
GST_WARNING_OBJECT (wavenc, "push header failed: flow = %s",
gst_flow_get_name (ret));
}
close #333784 unref the result of gst_pad_get_parent() by: Christophe Fergeau. Original commit message from CVS: * ext/cairo/gsttextoverlay.c: (gst_text_overlay_setcaps): * ext/esd/esdmon.c: (gst_esdmon_get): * ext/flac/gstflactag.c: (gst_flac_tag_chain): * ext/gdk_pixbuf/gstgdkpixbuf.c: (gst_gdk_pixbuf_sink_setcaps), (gst_gdk_pixbuf_sink_getcaps): * ext/jpeg/gstjpegenc.c: (gst_jpegenc_getcaps), (gst_jpegenc_setcaps): * ext/jpeg/gstsmokedec.c: (gst_smokedec_chain): * ext/jpeg/gstsmokeenc.c: (gst_smokeenc_getcaps), (gst_smokeenc_setcaps): * ext/libmng/gstmngdec.c: (gst_mngdec_sinklink), (gst_mngdec_src_getcaps): * ext/libmng/gstmngenc.c: (gst_mngenc_sinklink), (gst_mngenc_chain): * ext/libpng/gstpngenc.c: (gst_pngenc_setcaps): * ext/mikmod/gstmikmod.c: (gst_mikmod_srclink): * ext/speex/gstspeexdec.c: (speex_dec_convert), (speex_dec_src_event), (speex_dec_chain): * gst/avi/gstavimux.c: (gst_avimux_vidsinkconnect), (gst_avimux_audsinkconnect), (gst_avimux_handle_event): * gst/debug/negotiation.c: (gst_negotiation_getcaps), (gst_negotiation_pad_link), (gst_negotiation_chain): * gst/flx/gstflxdec.c: (gst_flxdec_src_query_handler), (gst_flxdec_chain): * gst/interleave/deinterleave.c: (deinterleave_sink_link), (deinterleave_chain): * gst/law/mulaw-encode.c: (mulawenc_setcaps): * gst/median/gstmedian.c: (gst_median_link): * gst/monoscope/gstmonoscope.c: (gst_monoscope_srcconnect), (gst_monoscope_chain): * gst/rtp/gstrtpL16pay.c: (gst_rtpL16pay_sinkconnect): * gst/wavenc/gstwavenc.c: (gst_wavenc_sink_setcaps): * sys/osxaudio/gstosxaudiosink.c: (gst_osxaudiosink_chain): * sys/osxaudio/gstosxaudiosrc.c: (gst_osxaudiosrc_get): close #333784 unref the result of gst_pad_get_parent() by: Christophe Fergeau.
2006-03-13 15:49:08 +00:00
return ret;
}
static gboolean
gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstWavEnc *wavenc;
GstStructure *structure;
const gchar *name;
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gint chans, rate;
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GstCaps *ccaps;
wavenc = GST_WAVENC (gst_pad_get_parent (pad));
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ccaps = gst_pad_get_current_caps (pad);
if (wavenc->sent_header && ccaps && !gst_caps_can_intersect (caps, ccaps)) {
gst_caps_unref (ccaps);
GST_WARNING_OBJECT (wavenc, "cannot change format in middle of stream");
goto fail;
}
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if (ccaps)
gst_caps_unref (ccaps);
GST_DEBUG_OBJECT (wavenc, "got caps: %" GST_PTR_FORMAT, caps);
structure = gst_caps_get_structure (caps, 0);
name = gst_structure_get_name (structure);
if (!gst_structure_get_int (structure, "channels", &chans) ||
!gst_structure_get_int (structure, "rate", &rate)) {
GST_WARNING_OBJECT (wavenc, "caps incomplete");
goto fail;
}
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if (strcmp (name, "audio/x-raw") == 0) {
GstAudioInfo info;
if (!gst_audio_info_from_caps (&info, caps))
goto fail;
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if (GST_AUDIO_INFO_IS_INTEGER (&info))
wavenc->format = GST_RIFF_WAVE_FORMAT_PCM;
else if (GST_AUDIO_INFO_IS_FLOAT (&info))
wavenc->format = GST_RIFF_WAVE_FORMAT_IEEE_FLOAT;
else
goto fail;
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wavenc->width = GST_AUDIO_INFO_WIDTH (&info);
} else if (strcmp (name, "audio/x-alaw") == 0) {
wavenc->format = GST_RIFF_WAVE_FORMAT_ALAW;
wavenc->width = 8;
} else if (strcmp (name, "audio/x-mulaw") == 0) {
wavenc->format = GST_RIFF_WAVE_FORMAT_MULAW;
wavenc->width = 8;
} else {
GST_WARNING_OBJECT (wavenc, "Unsupported format %s", name);
goto fail;
}
wavenc->channels = chans;
wavenc->rate = rate;
GST_LOG_OBJECT (wavenc,
"accepted caps: format=0x%04x chans=%u width=%u rate=%u",
wavenc->format, wavenc->channels, wavenc->width, wavenc->rate);
gst_object_unref (wavenc);
return TRUE;
fail:
gst_object_unref (wavenc);
return FALSE;
}
#if 0
static struct _maps
{
const guint32 id;
const gchar *name;
} maps[] = {
{
GST_RIFF_INFO_IARL, "Location"}, {
GST_RIFF_INFO_IART, "Artist"}, {
GST_RIFF_INFO_ICMS, "Commissioner"}, {
GST_RIFF_INFO_ICMT, "Comment"}, {
GST_RIFF_INFO_ICOP, "Copyright"}, {
GST_RIFF_INFO_ICRD, "Creation Date"}, {
GST_RIFF_INFO_IENG, "Engineer"}, {
GST_RIFF_INFO_IGNR, "Genre"}, {
GST_RIFF_INFO_IKEY, "Keywords"}, {
GST_RIFF_INFO_INAM, "Title"}, {
GST_RIFF_INFO_IPRD, "Product"}, {
GST_RIFF_INFO_ISBJ, "Subject"}, {
GST_RIFF_INFO_ISFT, "Software"}, {
GST_RIFF_INFO_ITCH, "Technician"}
};
static guint32
get_id_from_name (const char *name)
{
int i;
for (i = 0; i < G_N_ELEMENTS (maps); i++) {
if (strcasecmp (maps[i].name, name) == 0) {
return maps[i].id;
}
}
return 0;
}
static void
write_metadata (GstWavEnc * wavenc)
{
GString *info_str;
GList *props;
int total = 4;
gboolean need_to_write = FALSE;
info_str = g_string_new ("LIST INFO");
for (props = wavenc->metadata->properties->properties; props;
props = props->next) {
GstPropsEntry *entry = props->data;
const char *name;
guint32 id;
name = gst_props_entry_get_name (entry);
id = get_id_from_name (name);
if (id != 0) {
const char *text;
char *tmp;
int len, req, i;
need_to_write = TRUE; /* We've got at least one entry */
gst_props_entry_get_string (entry, &text);
len = strlen (text) + 1; /* The length in the file includes the \0 */
tmp = g_strdup_printf ("%" GST_FOURCC_FORMAT "%d%s", GST_FOURCC_ARGS (id),
GUINT32_TO_LE (len), text);
g_string_append (info_str, tmp);
g_free (tmp);
/* Check that we end on an even boundary */
req = ((len + 8) + 1) & ~1;
for (i = 0; i < req - len; i++) {
g_string_append_printf (info_str, "%c", 0);
}
total += req;
}
}
if (need_to_write) {
GstBuffer *buf;
/* Now we've got all the strings together, we can write our length in */
info_str->str[4] = GUINT32_TO_LE (total);
buf = gst_buffer_new ();
gst_buffer_set_data (buf, info_str->str, info_str->len);
gst_pad_push (wavenc->srcpad, GST_DATA (buf));
g_string_free (info_str, FALSE);
}
}
static void
write_cues (GstWavEnc * wavenc)
{
GString *cue_string, *point_string;
GstBuffer *buf;
GList *cue_list, *c;
int num_cues, total = 4;
if (gst_props_get (wavenc->metadata->properties,
"cues", &cue_list, NULL) == FALSE) {
/* No cues, move along please, nothing to see here */
return;
}
/* Space for 'cue ', chunk size and number of cuepoints */
cue_string = g_string_new ("cue ");
#define CUEPOINT_SIZE 24
point_string = g_string_sized_new (CUEPOINT_SIZE);
for (c = cue_list, num_cues = 0; c; c = c->next, num_cues++) {
GstCaps *cue_caps = c->data;
guint32 pos;
gst_props_get (cue_caps->properties, "position", &pos, NULL);
point_string->str[0] = GUINT32_TO_LE (num_cues + 1);
point_string->str[4] = GUINT32_TO_LE (0);
/* Fixme: There is probably a macro for this */
point_string->str[8] = 'd';
point_string->str[9] = 'a';
point_string->str[10] = 't';
point_string->str[11] = 'a';
point_string->str[12] = GUINT32_TO_LE (0);
point_string->str[16] = GUINT32_TO_LE (0);
point_string->str[20] = GUINT32_TO_LE (pos);
total += CUEPOINT_SIZE;
}
/* Set the length and chunk size */
cue_string->str[4] = GUINT32_TO_LE (total);
cue_string->str[8] = GUINT32_TO_LE (num_cues);
/* Stick the cue points on the end */
g_string_append (cue_string, point_string->str);
g_string_free (point_string, TRUE);
buf = gst_buffer_new ();
gst_buffer_set_data (buf, cue_string->str, cue_string->len);
gst_pad_push (wavenc->srcpad, GST_DATA (buf));
g_string_free (cue_string, FALSE);
}
static void
write_labels (GstWavEnc * wavenc)
{
GstBuffer *buf;
GString *info_str;
int total = 4;
GList *caps;
info_str = g_string_new ("LIST adtl");
if (gst_props_get (wavenc->metadata->properties, "ltxts", &caps, NULL)) {
GList *p;
int i;
for (p = caps, i = 1; p; p = p->next, i++) {
GstCaps *ltxt_caps = p->data;
GString *ltxt;
char *label = NULL;
int len, req, j;
gst_props_get (ltxt_caps->properties, "name", &label, NULL);
len = strlen (label);
#define LTXT_SIZE 28
ltxt = g_string_new ("ltxt ");
ltxt->str[8] = GUINT32_TO_LE (i); /* Identifier */
ltxt->str[12] = GUINT32_TO_LE (0); /* Sample Length */
ltxt->str[16] = GUINT32_TO_LE (0); /* FIXME: Don't save the purpose yet */
ltxt->str[20] = GUINT16_TO_LE (0); /* Country */
ltxt->str[22] = GUINT16_TO_LE (0); /* Language */
ltxt->str[24] = GUINT16_TO_LE (0); /* Dialect */
ltxt->str[26] = GUINT16_TO_LE (0); /* Code Page */
g_string_append (ltxt, label);
g_free (label);
len += LTXT_SIZE;
ltxt->str[4] = GUINT32_TO_LE (len);
/* Check that we end on an even boundary */
req = ((len + 8) + 1) & ~1;
for (j = 0; j < req - len; j++) {
g_string_append_printf (ltxt, "%c", 0);
}
total += req;
g_string_append (info_str, ltxt->str);
g_string_free (ltxt, TRUE);
}
}
if (gst_props_get (wavenc->metadata->properties, "labels", &caps, NULL)) {
GList *p;
int i;
for (p = caps, i = 1; p; p = p->next, i++) {
GstCaps *labl_caps = p->data;
GString *labl;
char *label = NULL;
int len, req, j;
gst_props_get (labl_caps->properties, "name", &label, NULL);
len = strlen (label);
#define LABL_SIZE 4
labl = g_string_new ("labl ");
labl->str[8] = GUINT32_TO_LE (i);
g_string_append (labl, label);
g_free (label);
len += LABL_SIZE;
labl->str[4] = GUINT32_TO_LE (len);
/* Check our size */
req = ((len + 8) + 1) & ~1;
for (j = 0; j < req - len; j++) {
g_string_append_printf (labl, "%c", 0);
}
total += req;
g_string_append (info_str, labl->str);
g_string_free (labl, TRUE);
}
}
if (gst_props_get (wavenc->metadata->properties, "notes", &caps, NULL)) {
GList *p;
int i;
for (p = caps, i = 1; p; p = p->next, i++) {
GstCaps *note_caps = p->data;
GString *note;
char *label = NULL;
int len, req, j;
gst_props_get (note_caps->properties, "name", &label, NULL);
len = strlen (label);
#define NOTE_SIZE 4
note = g_string_new ("note ");
note->str[8] = GUINT32_TO_LE (i);
g_string_append (note, label);
g_free (label);
len += NOTE_SIZE;
note->str[4] = GUINT32_TO_LE (len);
/* Size check */
req = ((len + 8) + 1) & ~1;
for (j = 0; j < req - len; j++) {
g_string_append_printf (note, "%c", 0);
}
total += req;
g_string_append (info_str, note->str);
g_string_free (note, TRUE);
}
}
info_str->str[4] = GUINT32_TO_LE (total);
buf = gst_buffer_new ();
gst_buffer_set_data (buf, info_str->str, info_str->len);
gst_pad_push (wavenc->srcpad, GST_DATA (buf));
g_string_free (info_str, FALSE);
}
#endif
static gboolean
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gst_wavenc_is_cue_id_unique (guint32 id, GList * list)
{
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GstWavEncCue *cue;
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while (list) {
cue = list->data;
if (cue->id == id)
return FALSE;
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list = g_list_next (list);
}
return TRUE;
}
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static gboolean
gst_wavenc_parse_cue (GstWavEnc * wavenc, guint32 id, GstTocEntry * entry)
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{
gint64 start;
GstWavEncCue *cue;
g_return_val_if_fail (entry != NULL, FALSE);
gst_toc_entry_get_start_stop_times (entry, &start, NULL);
cue = g_new (GstWavEncCue, 1);
cue->id = id;
cue->position = gst_util_uint64_scale_round (start, wavenc->rate, GST_SECOND);
memcpy (cue->data_chunk_id, "data", 4);
cue->chunk_start = 0;
cue->block_start = 0;
cue->sample_offset = cue->position;
wavenc->cues = g_list_append (wavenc->cues, cue);
return TRUE;
}
static gboolean
gst_wavenc_parse_labl (GstWavEnc * wavenc, guint32 id, GstTocEntry * entry)
{
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gchar *tag;
GstTagList *tags;
GstWavEncLabl *labl;
g_return_val_if_fail (entry != NULL, FALSE);
tags = gst_toc_entry_get_tags (entry);
if (!tags) {
GST_INFO_OBJECT (wavenc, "no tags for entry: %d", id);
return FALSE;
}
if (!gst_tag_list_get_string (tags, GST_TAG_TITLE, &tag)) {
GST_INFO_OBJECT (wavenc, "no title tag for entry: %d", id);
return FALSE;
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}
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labl = g_new (GstWavEncLabl, 1);
memcpy (labl->chunk_id, "labl", 4);
labl->chunk_data_size = 4 + strlen (tag) + 1;
labl->cue_point_id = id;
labl->text = tag;
GST_DEBUG_OBJECT (wavenc, "got labl: '%s'", tag);
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wavenc->labls = g_list_append (wavenc->labls, labl);
return TRUE;
}
static gboolean
gst_wavenc_parse_note (GstWavEnc * wavenc, guint32 id, GstTocEntry * entry)
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{
gchar *tag;
GstTagList *tags;
GstWavEncNote *note;
g_return_val_if_fail (entry != NULL, FALSE);
tags = gst_toc_entry_get_tags (entry);
if (!tags) {
GST_INFO_OBJECT (wavenc, "no tags for entry: %d", id);
return FALSE;
}
if (!gst_tag_list_get_string (tags, GST_TAG_COMMENT, &tag)) {
GST_INFO_OBJECT (wavenc, "no comment tag for entry: %d", id);
return FALSE;
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}
note = g_new (GstWavEncNote, 1);
memcpy (note->chunk_id, "note", 4);
note->chunk_data_size = 4 + strlen (tag) + 1;
note->cue_point_id = id;
note->text = tag;
GST_DEBUG_OBJECT (wavenc, "got note: '%s'", tag);
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wavenc->notes = g_list_append (wavenc->notes, note);
return TRUE;
}
static gboolean
gst_wavenc_write_cues (guint8 ** data, GList * list)
{
GstWavEncCue *cue;
while (list) {
cue = list->data;
GST_WRITE_UINT32_LE (*data, cue->id);
GST_WRITE_UINT32_LE (*data + 4, cue->position);
memcpy (*data + 8, (gchar *) cue->data_chunk_id, 4);
GST_WRITE_UINT32_LE (*data + 12, cue->chunk_start);
GST_WRITE_UINT32_LE (*data + 16, cue->block_start);
GST_WRITE_UINT32_LE (*data + 20, cue->sample_offset);
*data += 24;
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list = g_list_next (list);
}
return TRUE;
}
static gboolean
gst_wavenc_write_labls (guint8 ** data, GList * list)
{
GstWavEncLabl *labl;
while (list) {
labl = list->data;
memcpy (*data, (gchar *) labl->chunk_id, 4);
GST_WRITE_UINT32_LE (*data + 4, labl->chunk_data_size);
GST_WRITE_UINT32_LE (*data + 8, labl->cue_point_id);
memcpy (*data + 12, (gchar *) labl->text, strlen (labl->text));
*data += 8 + GST_ROUND_UP_2 (labl->chunk_data_size);
list = g_list_next (list);
}
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return TRUE;
}
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static gboolean
gst_wavenc_write_notes (guint8 ** data, GList * list)
{
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GstWavEncNote *note;
while (list) {
note = list->data;
memcpy (*data, (gchar *) note->chunk_id, 4);
GST_WRITE_UINT32_LE (*data + 4, note->chunk_data_size);
GST_WRITE_UINT32_LE (*data + 8, note->cue_point_id);
memcpy (*data + 12, (gchar *) note->text, strlen (note->text));
*data += 8 + GST_ROUND_UP_2 (note->chunk_data_size);
list = g_list_next (list);
}
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return TRUE;
}
static gboolean
gst_wavenc_write_toc (GstWavEnc * wavenc)
{
GList *list;
GstToc *toc;
GstTocEntry *entry, *subentry;
GstBuffer *buf;
GstMapInfo map;
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guint8 *data;
guint32 ncues, size, cues_size, labls_size, notes_size;
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size = 0;
cues_size = 0;
labls_size = 0;
notes_size = 0;
if (wavenc->toc) {
toc = gst_toc_ref (wavenc->toc);
} else {
GST_WARNING_OBJECT (wavenc, "TOC not found");
return FALSE;
}
/* check if the TOC entries is valid */
list = gst_toc_get_entries (toc);
entry = list->data;
if (gst_toc_entry_is_alternative (entry)) {
list = gst_toc_entry_get_sub_entries (entry);
while (list) {
subentry = list->data;
if (!gst_toc_entry_is_sequence (subentry))
return FALSE;
list = g_list_next (list);
}
list = gst_toc_entry_get_sub_entries (entry);
}
if (gst_toc_entry_is_sequence (entry)) {
while (list) {
entry = list->data;
if (!gst_toc_entry_is_sequence (entry))
return FALSE;
list = g_list_next (list);
}
list = gst_toc_get_entries (toc);
}
ncues = g_list_length (list);
GST_DEBUG_OBJECT (wavenc, "number of cue entries: %d", ncues);
while (list) {
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guint32 id = 0;
gint64 id64;
const gchar *uid;
entry = list->data;
uid = gst_toc_entry_get_uid (entry);
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id64 = g_ascii_strtoll (uid, NULL, 0);
/* check if id unique compatible with guint32 else generate random */
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if (id64 >= 0 && gst_wavenc_is_cue_id_unique (id64, wavenc->cues)) {
id = (guint32) id64;
} else {
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do {
id = g_random_int ();
} while (!gst_wavenc_is_cue_id_unique (id, wavenc->cues));
}
gst_wavenc_parse_cue (wavenc, id, entry);
gst_wavenc_parse_labl (wavenc, id, entry);
gst_wavenc_parse_note (wavenc, id, entry);
list = g_list_next (list);
}
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/* count cues size */
if (wavenc->cues) {
cues_size = 24 * g_list_length (wavenc->cues);
size += 12 + cues_size;
} else {
GST_WARNING_OBJECT (wavenc, "cue's not found");
return FALSE;
}
/* count labls size */
if (wavenc->labls) {
list = wavenc->labls;
while (list) {
GstWavEncLabl *labl;
labl = list->data;
labls_size += 8 + GST_ROUND_UP_2 (labl->chunk_data_size);
list = g_list_next (list);
}
size += labls_size;
}
/* count notes size */
if (wavenc->notes) {
list = wavenc->notes;
while (list) {
GstWavEncNote *note;
note = list->data;
notes_size += 8 + GST_ROUND_UP_2 (note->chunk_data_size);
list = g_list_next (list);
}
size += notes_size;
}
if (wavenc->labls || wavenc->notes) {
size += 12;
}
buf = gst_buffer_new_and_alloc (size);
gst_buffer_map (buf, &map, GST_MAP_WRITE);
data = map.data;
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memset (data, 0, size);
/* write Cue Chunk */
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if (wavenc->cues) {
memcpy (data, (gchar *) "cue ", 4);
GST_WRITE_UINT32_LE (data + 4, 4 + cues_size);
GST_WRITE_UINT32_LE (data + 8, ncues);
data += 12;
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gst_wavenc_write_cues (&data, wavenc->cues);
/* write Associated Data List Chunk */
if (wavenc->labls || wavenc->notes) {
memcpy (data, (gchar *) "LIST", 4);
GST_WRITE_UINT32_LE (data + 4, 4 + labls_size + notes_size);
memcpy (data + 8, (gchar *) "adtl", 4);
data += 12;
if (wavenc->labls)
gst_wavenc_write_labls (&data, wavenc->labls);
if (wavenc->notes)
gst_wavenc_write_notes (&data, wavenc->notes);
}
}
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/* free resources */
if (toc)
gst_toc_unref (toc);
if (wavenc->cues)
g_list_free_full (wavenc->cues, g_free);
if (wavenc->labls)
g_list_free_full (wavenc->labls, g_free);
if (wavenc->notes)
g_list_free_full (wavenc->notes, g_free);
gst_buffer_unmap (buf, &map);
gst_pad_push (wavenc->srcpad, buf);
return TRUE;
}
static gboolean
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gst_wavenc_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res = TRUE;
GstWavEnc *wavenc;
GstToc *toc;
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wavenc = GST_WAVENC (parent);
switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:
{
GstCaps *caps;
gst_event_parse_caps (event, &caps);
gst_wavenc_sink_setcaps (pad, caps);
/* have our own src caps */
gst_event_unref (event);
break;
}
case GST_EVENT_EOS:{
GST_DEBUG_OBJECT (wavenc, "got EOS");
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if (!wavenc->toc) {
GST_DEBUG_OBJECT (wavenc, "have no toc, checking toc_setter");
wavenc->toc = gst_toc_setter_get_toc (GST_TOC_SETTER (wavenc));
}
if (wavenc->toc) {
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GST_DEBUG_OBJECT (wavenc, "have toc");
gst_wavenc_write_toc (wavenc);
}
#if 0
/* Write our metadata if we have any */
if (wavenc->metadata) {
write_metadata (wavenc);
write_cues (wavenc);
write_labels (wavenc);
}
#endif
/* write header with correct length values */
gst_wavenc_push_header (wavenc, wavenc->length);
/* we're done with this file */
wavenc->finished_properly = TRUE;
/* and forward the EOS event */
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res = gst_pad_event_default (pad, parent, event);
break;
}
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case GST_EVENT_SEGMENT:
/* Just drop it, it's probably in TIME format
* anyway. We'll send our own newsegment event */
gst_event_unref (event);
break;
case GST_EVENT_TOC:
gst_event_parse_toc (event, &toc, NULL);
if (toc) {
if (wavenc->toc != toc) {
if (wavenc->toc)
gst_toc_unref (wavenc->toc);
wavenc->toc = toc;
} else {
gst_toc_unref (toc);
}
}
res = gst_pad_event_default (pad, parent, event);
break;
default:
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res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static GstFlowReturn
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gst_wavenc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
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GstWavEnc *wavenc = GST_WAVENC (parent);
GstFlowReturn flow = GST_FLOW_OK;
g_return_val_if_fail (wavenc->channels > 0, GST_FLOW_FLUSHING);
if (!wavenc->sent_header) {
/* use bogus size initially, we'll write the real
* header when we get EOS and know the exact length */
flow = gst_wavenc_push_header (wavenc, 0x7FFF0000);
/* starting a file, means we have to finish it properly */
wavenc->finished_properly = FALSE;
if (flow != GST_FLOW_OK)
return flow;
GST_DEBUG_OBJECT (wavenc, "wrote dummy header");
wavenc->sent_header = TRUE;
}
GST_LOG_OBJECT (wavenc,
"pushing %" G_GSIZE_FORMAT " bytes raw audio, ts=%" GST_TIME_FORMAT,
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gst_buffer_get_size (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
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buf = gst_buffer_make_writable (buf);
GST_BUFFER_OFFSET (buf) = WAV_HEADER_LEN + wavenc->length;
GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
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wavenc->length += gst_buffer_get_size (buf);
flow = gst_pad_push (wavenc->srcpad, buf);
return flow;
}
static GstStateChangeReturn
gst_wavenc_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
GstWavEnc *wavenc = GST_WAVENC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
wavenc->format = 0;
wavenc->channels = 0;
wavenc->width = 0;
wavenc->rate = 0;
wavenc->length = 0;
wavenc->sent_header = FALSE;
/* its true because we haven't writen anything */
wavenc->finished_properly = TRUE;
break;
default:
break;
}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret != GST_STATE_CHANGE_SUCCESS)
return ret;
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
if (!wavenc->finished_properly) {
GST_ELEMENT_WARNING (wavenc, STREAM, MUX,
("Wav stream not finished properly"),
("Wav stream not finished properly, no EOS received "
"before shutdown"));
}
break;
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case GST_STATE_CHANGE_READY_TO_NULL:
GST_DEBUG_OBJECT (wavenc, "toc: %p", wavenc->toc);
if (wavenc->toc) {
gst_toc_unref (wavenc->toc);
wavenc->toc = NULL;
}
gst_toc_setter_reset (GST_TOC_SETTER (wavenc));
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
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return gst_element_register (plugin, "wavenc", GST_RANK_PRIMARY,
GST_TYPE_WAVENC);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
wavenc,
"Encode raw audio into WAV",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)