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gstreamer/gst/wavenc/gstwavenc.c
Aaron Boxer 46989dca96 documentation: fix a number of typos
2019-10-05 22:38:11 +00:00

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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
* @title: wavenc
*
* Format an audio stream into the wav format.
*
* ## Example launch line
* |[
* 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.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include "gstwavenc.h"
#include <gst/audio/audio.h>
#include <gst/riff/riff-media.h>
#include <gst/base/gstbytewriter.h>
GST_DEBUG_CATEGORY_STATIC (wavenc_debug);
#define GST_CAT_DEFAULT wavenc_debug
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;
} GstWavEncCue;
typedef struct
{
/* Offset Size Description Value
* 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;
} GstWavEncLabl, GstWavEncNote;
/* FIXME: mono doesn't produce correct files it seems, at least mplayer xruns */
#define SINK_CAPS \
"audio/x-raw, " \
"rate = (int) [ 1, MAX ], " \
"channels = (int) [ 1, 65535 ], " \
"format = (string) { S32LE, S24LE, S16LE, U8, F32LE, F64LE }, " \
"layout = (string) interleaved" \
"; " \
"audio/x-alaw, " \
"rate = (int) [ 8000, 192000 ], " \
"channels = (int) [ 1, 2 ]; " \
"audio/x-mulaw, " \
"rate = (int) [ 8000, 192000 ], " \
"channels = (int) [ 1, 2 ]"
#define SRC_CAPS \
"audio/x-wav; " \
"audio/x-rf64"
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 (SRC_CAPS)
);
#define gst_wavenc_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstWavEnc, gst_wavenc, GST_TYPE_ELEMENT,
G_IMPLEMENT_INTERFACE (GST_TYPE_TAG_SETTER, NULL)
G_IMPLEMENT_INTERFACE (GST_TYPE_TOC_SETTER, NULL)
);
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
gst_wavenc_class_init (GstWavEncClass * klass)
{
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_static_pad_template (element_class, &src_factory);
gst_element_class_add_static_pad_template (element_class, &sink_factory);
GST_DEBUG_CATEGORY_INIT (wavenc_debug, "wavenc", 0, "WAV encoder element");
}
static void
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_element_add_pad (GST_ELEMENT (wavenc), wavenc->srcpad);
}
#define RIFF_CHUNK_LEN 12
#define FMT_WAV_CHUNK_LEN 24
#define FMT_EXT_CHUNK_LEN 48
#define FACT_CHUNK_LEN 12
#define DATA_HEADER_LEN 8
#define DS64_CHUNK_LEN 36
static gboolean
use_format_ext (GstWavEnc * wavenc)
{
return wavenc->channels > 2;
}
static gboolean
use_fact_chunk (GstWavEnc * wavenc)
{
return use_format_ext (wavenc) && !wavenc->use_rf64;
}
static int
get_header_len (GstWavEnc * wavenc)
{
int len = RIFF_CHUNK_LEN;
if (use_format_ext (wavenc))
len += FMT_EXT_CHUNK_LEN;
else
len += FMT_WAV_CHUNK_LEN;
if (use_fact_chunk (wavenc))
len += FACT_CHUNK_LEN;
if (wavenc->use_rf64)
len += DS64_CHUNK_LEN;
return len + DATA_HEADER_LEN;
}
static guint64
gstmask_to_wavmask (guint64 gstmask, GstAudioChannelPosition * pos)
{
const GstAudioChannelPosition valid_pos =
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT |
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT |
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER |
GST_AUDIO_CHANNEL_POSITION_LFE1 |
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT |
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT |
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER |
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER |
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER |
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT |
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT |
GST_AUDIO_CHANNEL_POSITION_TOP_CENTER |
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT |
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER |
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT |
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT |
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER |
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT;
const GstAudioChannelPosition wav_pos[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE1,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT_OF_CENTER,
GST_AUDIO_CHANNEL_POSITION_REAR_CENTER,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_TOP_CENTER,
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_TOP_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_CENTER,
GST_AUDIO_CHANNEL_POSITION_TOP_REAR_RIGHT,
};
int k;
int chan = 0;
guint64 ret = 0;
guint64 mask = 1;
if (gstmask == 0 || ((gstmask & ~valid_pos) != 0))
return 0;
for (k = 0; k < G_N_ELEMENTS (wav_pos); ++k) {
if (gstmask & wav_pos[k]) {
ret |= mask;
pos[chan++] = wav_pos[k];
}
mask <<= 1;
}
return ret;
}
static guint8 *
write_fmt_chunk (GstWavEnc * wavenc, guint8 * header)
{
guint16 wBlockAlign;
wBlockAlign = (wavenc->width / 8) * wavenc->channels;
memcpy (header, "fmt ", 4);
/* wChannels */
GST_WRITE_UINT16_LE (header + 10, wavenc->channels);
/* dwSamplesPerSec */
GST_WRITE_UINT32_LE (header + 12, wavenc->rate);
/* dwAvgBytesPerSec */
GST_WRITE_UINT32_LE (header + 16, wBlockAlign * wavenc->rate);
/* wBlockAlign */
GST_WRITE_UINT16_LE (header + 20, wBlockAlign);
/* wBitsPerSample */
GST_WRITE_UINT16_LE (header + 22, wavenc->width);
if (use_format_ext (wavenc)) {
GST_DEBUG_OBJECT (wavenc, "Using WAVE_FORMAT_EXTENSIBLE");
GST_WRITE_UINT32_LE (header + 4, FMT_EXT_CHUNK_LEN - 8);
/* wFormatTag */
GST_WRITE_UINT16_LE (header + 8, 0xFFFE);
/* cbSize */
GST_WRITE_UINT16_LE (header + 24, 22);
/* wValidBitsPerSample */
GST_WRITE_UINT16_LE (header + 26, wavenc->width);
/* dwChannelMask */
GST_WRITE_UINT32_LE (header + 28, (guint32) wavenc->channel_mask);
GST_WRITE_UINT16_LE (header + 32, wavenc->format);
memcpy (header + 34,
"\x00\x00\x00\x00\x10\x00\x80\x00\x00\xAA\x00\x38\x9B\x71", 14);
header += FMT_EXT_CHUNK_LEN;
} else {
GST_WRITE_UINT32_LE (header + 4, FMT_WAV_CHUNK_LEN - 8);
/* wFormatTag */
GST_WRITE_UINT16_LE (header + 8, wavenc->format);
header += FMT_WAV_CHUNK_LEN;
}
return header;
}
static guint64
get_num_frames (GstWavEnc * wavenc)
{
if (wavenc->channels == 0 || wavenc->width == 0)
return 0;
return wavenc->audio_length / (wavenc->width / 8) / wavenc->channels;
}
static guint8 *
write_fact_chunk (GstWavEnc * wavenc, guint8 * header)
{
memcpy (header, "fact", 4);
GST_WRITE_UINT32_LE (header + 4, FACT_CHUNK_LEN - 8);
/* compressed files are only supported up to 2 channels,
* that means we never write a fact chunk for them */
if (wavenc->use_rf64)
GST_WRITE_UINT32_LE (header + 8, 0xFFFFFFFF);
else
GST_WRITE_UINT32_LE (header + 8, (guint32) get_num_frames (wavenc));
return header + FACT_CHUNK_LEN;
}
static guint8 *
write_ds64_chunk (GstWavEnc * wavenc, guint64 riffLen, guint8 * header)
{
guint64 numFrames = get_num_frames (wavenc);
GST_DEBUG_OBJECT (wavenc, "riffLen=%" G_GUINT64_FORMAT
", audio length=%" G_GUINT64_FORMAT ", numFrames=%" G_GUINT64_FORMAT,
riffLen, wavenc->audio_length, numFrames);
memcpy (header, "ds64", 4);
GST_WRITE_UINT32_LE (header + 4, DS64_CHUNK_LEN - 8);
/* riffSize */
GST_WRITE_UINT32_LE (header + 8, (guint32) (riffLen & 0xFFFFFFFF));
GST_WRITE_UINT32_LE (header + 12, (guint32) (riffLen >> 32));
/* dataSize */
GST_WRITE_UINT32_LE (header + 16,
(guint32) (wavenc->audio_length & 0xFFFFFFFF));
GST_WRITE_UINT32_LE (header + 20, (guint32) (wavenc->audio_length >> 32));
/* sampleCount */
GST_WRITE_UINT32_LE (header + 24, (guint32) (numFrames & 0xFFFFFFFF));
GST_WRITE_UINT32_LE (header + 28, (guint32) (numFrames >> 32));
/* tableLength always zero for now */
GST_WRITE_UINT32_LE (header + 32, 0);
return header + DS64_CHUNK_LEN;
}
static GstBuffer *
gst_wavenc_create_header_buf (GstWavEnc * wavenc)
{
GstBuffer *buf;
GstMapInfo map;
guint8 *header;
guint64 riffLen;
GST_DEBUG_OBJECT (wavenc, "Header size: %d", get_header_len (wavenc));
buf = gst_buffer_new_and_alloc (get_header_len (wavenc));
gst_buffer_map (buf, &map, GST_MAP_WRITE);
header = map.data;
memset (header, 0, get_header_len (wavenc));
riffLen = wavenc->meta_length + wavenc->audio_length
+ get_header_len (wavenc) - 8;
/* RIFF chunk */
if (wavenc->use_rf64) {
GST_DEBUG_OBJECT (wavenc, "Using RF64");
memcpy (header, "RF64", 4);
GST_WRITE_UINT32_LE (header + 4, 0xFFFFFFFF);
} else {
memcpy (header, "RIFF", 4);
GST_WRITE_UINT32_LE (header + 4, (guint32) riffLen);
}
memcpy (header + 8, "WAVE", 4);
header += RIFF_CHUNK_LEN;
if (wavenc->use_rf64)
header = write_ds64_chunk (wavenc, riffLen, header);
header = write_fmt_chunk (wavenc, header);
if (use_fact_chunk (wavenc))
header = write_fact_chunk (wavenc, header);
/* data chunk */
memcpy (header, "data ", 4);
if (wavenc->use_rf64)
GST_WRITE_UINT32_LE (header + 4, 0xFFFFFFFF);
else
GST_WRITE_UINT32_LE (header + 4, (guint32) wavenc->audio_length);
gst_buffer_unmap (buf, &map);
return buf;
}
static GstFlowReturn
gst_wavenc_push_header (GstWavEnc * wavenc)
{
GstFlowReturn ret;
GstBuffer *outbuf;
GstSegment segment;
/* seek to beginning of file */
gst_segment_init (&segment, GST_FORMAT_BYTES);
if (!gst_pad_push_event (wavenc->srcpad, gst_event_new_segment (&segment))) {
GST_WARNING_OBJECT (wavenc, "Seek to the beginning failed");
return GST_FLOW_ERROR;
}
GST_DEBUG_OBJECT (wavenc, "writing header, meta_size=%u, audio_size=%"
G_GUINT64_FORMAT, wavenc->meta_length, wavenc->audio_length);
outbuf = gst_wavenc_create_header_buf (wavenc);
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));
}
return ret;
}
static gboolean
gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps)
{
GstWavEnc *wavenc;
GstStructure *structure;
const gchar *name;
gint chans, rate;
GstCaps *ccaps;
wavenc = GST_WAVENC (gst_pad_get_parent (pad));
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;
}
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;
}
wavenc->channels = chans;
wavenc->rate = rate;
wavenc->channel_mask = 0;
if (strcmp (name, "audio/x-raw") == 0) {
GstAudioInfo info;
guint64 gstmask;
if (!gst_audio_info_from_caps (&info, caps)) {
GST_WARNING_OBJECT (wavenc, "Could not retrieve audio info from caps");
goto fail;
}
if (gst_audio_channel_positions_to_mask (info.position, wavenc->channels,
FALSE, &gstmask)) {
wavenc->channel_mask = gstmask_to_wavmask (gstmask, wavenc->destPos);
memcpy (wavenc->srcPos, info.position, sizeof (info.position));
GST_DEBUG_OBJECT (wavenc, "Channel mask input: 0x%" G_GINT64_MODIFIER "x"
" output: 0x%" G_GINT64_MODIFIER "x", gstmask, wavenc->channel_mask);
}
wavenc->audio_format = GST_AUDIO_INFO_FORMAT (&info);
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;
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;
}
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;
}
static void
gst_wavparse_tags_foreach (const GstTagList * tags, const gchar * tag,
gpointer data)
{
const struct
{
guint32 fcc;
const gchar *tag;
} rifftags[] = {
{
GST_RIFF_INFO_IARL, GST_TAG_LOCATION}, {
GST_RIFF_INFO_IART, GST_TAG_ARTIST}, {
GST_RIFF_INFO_ICMT, GST_TAG_COMMENT}, {
GST_RIFF_INFO_ICOP, GST_TAG_COPYRIGHT}, {
GST_RIFF_INFO_ICRD, GST_TAG_DATE}, {
GST_RIFF_INFO_IGNR, GST_TAG_GENRE}, {
GST_RIFF_INFO_IKEY, GST_TAG_KEYWORDS}, {
GST_RIFF_INFO_INAM, GST_TAG_TITLE}, {
GST_RIFF_INFO_IPRD, GST_TAG_ALBUM}, {
GST_RIFF_INFO_ISBJ, GST_TAG_ALBUM_ARTIST}, {
GST_RIFF_INFO_ISFT, GST_TAG_ENCODER}, {
GST_RIFF_INFO_ISRC, GST_TAG_ISRC}, {
0, NULL}
};
gint n;
gchar *str = NULL;
GstByteWriter *bw = data;
for (n = 0; rifftags[n].fcc != 0; n++) {
if (!strcmp (rifftags[n].tag, tag)) {
if (rifftags[n].fcc == GST_RIFF_INFO_ICRD) {
GDate *date;
/* special case for the date tag */
if (gst_tag_list_get_date (tags, tag, &date)) {
str =
g_strdup_printf ("%04d:%02d:%02d", g_date_get_year (date),
g_date_get_month (date), g_date_get_day (date));
g_date_free (date);
}
} else {
gst_tag_list_get_string (tags, tag, &str);
}
if (str) {
gst_byte_writer_put_uint32_le (bw, rifftags[n].fcc);
gst_byte_writer_put_uint32_le (bw, GST_ROUND_UP_2 (strlen (str)));
gst_byte_writer_put_string (bw, str);
g_free (str);
str = NULL;
break;
}
}
}
}
static GstFlowReturn
gst_wavenc_write_tags (GstWavEnc * wavenc)
{
const GstTagList *user_tags;
GstTagList *tags;
guint size;
GstBuffer *buf;
GstByteWriter bw;
g_return_val_if_fail (wavenc != NULL, GST_FLOW_OK);
user_tags = gst_tag_setter_get_tag_list (GST_TAG_SETTER (wavenc));
if ((!wavenc->tags) && (!user_tags)) {
GST_DEBUG_OBJECT (wavenc, "have no tags");
return GST_FLOW_OK;
}
tags =
gst_tag_list_merge (user_tags, wavenc->tags,
gst_tag_setter_get_tag_merge_mode (GST_TAG_SETTER (wavenc)));
GST_DEBUG_OBJECT (wavenc, "writing tags");
gst_byte_writer_init_with_size (&bw, 1024, FALSE);
/* add LIST INFO chunk */
gst_byte_writer_put_data (&bw, (const guint8 *) "LIST", 4);
gst_byte_writer_put_uint32_le (&bw, 0);
gst_byte_writer_put_data (&bw, (const guint8 *) "INFO", 4);
/* add tags */
gst_tag_list_foreach (tags, gst_wavparse_tags_foreach, &bw);
/* sets real size of LIST INFO chunk */
size = gst_byte_writer_get_pos (&bw);
gst_byte_writer_set_pos (&bw, 4);
gst_byte_writer_put_uint32_le (&bw, size - 8);
gst_tag_list_unref (tags);
buf = gst_byte_writer_reset_and_get_buffer (&bw);
wavenc->meta_length += gst_buffer_get_size (buf);
return gst_pad_push (wavenc->srcpad, buf);
}
static gboolean
gst_wavenc_is_cue_id_unique (guint32 id, GList * list)
{
GstWavEncCue *cue;
while (list) {
cue = list->data;
if (cue->id == id)
return FALSE;
list = g_list_next (list);
}
return TRUE;
}
static gboolean
gst_wavenc_parse_cue (GstWavEnc * wavenc, guint32 id, GstTocEntry * entry)
{
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)
{
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;
}
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);
wavenc->labls = g_list_append (wavenc->labls, labl);
return TRUE;
}
static gboolean
gst_wavenc_parse_note (GstWavEnc * wavenc, guint32 id, GstTocEntry * entry)
{
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;
}
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);
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;
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);
}
return TRUE;
}
static gboolean
gst_wavenc_write_notes (guint8 ** data, GList * list)
{
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);
}
return TRUE;
}
static GstFlowReturn
gst_wavenc_write_toc (GstWavEnc * wavenc)
{
GList *list;
GstToc *toc;
GstTocEntry *entry, *subentry;
GstBuffer *buf;
GstMapInfo map;
guint8 *data;
guint32 ncues, size, cues_size, labls_size, notes_size;
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) {
GST_WARNING_OBJECT (wavenc, "have no toc");
return GST_FLOW_OK;
}
toc = gst_toc_ref (wavenc->toc);
size = 0;
cues_size = 0;
labls_size = 0;
notes_size = 0;
/* 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) {
guint32 id = 0;
gint64 id64;
const gchar *uid;
entry = list->data;
uid = gst_toc_entry_get_uid (entry);
id64 = g_ascii_strtoll (uid, NULL, 0);
/* check if id unique compatible with guint32 else generate random */
if (id64 >= 0 && gst_wavenc_is_cue_id_unique (id64, wavenc->cues)) {
id = (guint32) id64;
} else {
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);
}
/* 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;
memset (data, 0, size);
/* write Cue Chunk */
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;
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);
}
}
/* 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);
wavenc->meta_length += gst_buffer_get_size (buf);
return gst_pad_push (wavenc->srcpad, buf);
}
static gboolean
gst_wavenc_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
gboolean res = TRUE;
GstWavEnc *wavenc;
GstTagList *tags;
GstToc *toc;
wavenc = GST_WAVENC (parent);
switch (GST_EVENT_TYPE (event)) {
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:
{
GstFlowReturn flow;
GST_DEBUG_OBJECT (wavenc, "got EOS");
flow = gst_wavenc_write_toc (wavenc);
if (flow != GST_FLOW_OK) {
GST_WARNING_OBJECT (wavenc, "error pushing toc: %s",
gst_flow_get_name (flow));
}
flow = gst_wavenc_write_tags (wavenc);
if (flow != GST_FLOW_OK) {
GST_WARNING_OBJECT (wavenc, "error pushing tags: %s",
gst_flow_get_name (flow));
}
/* write header with correct length values */
gst_wavenc_push_header (wavenc);
/* we're done with this file */
wavenc->finished_properly = TRUE;
/* and forward the EOS event */
res = gst_pad_event_default (pad, parent, event);
break;
}
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;
case GST_EVENT_TAG:
gst_event_parse_tag (event, &tags);
if (tags) {
if (wavenc->tags != tags) {
if (wavenc->tags)
gst_tag_list_unref (wavenc->tags);
wavenc->tags = gst_tag_list_ref (tags);
}
}
res = gst_pad_event_default (pad, parent, event);
break;
default:
res = gst_pad_event_default (pad, parent, event);
break;
}
return res;
}
static GstFlowReturn
gst_wavenc_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
{
GstWavEnc *wavenc = GST_WAVENC (parent);
GstFlowReturn flow = GST_FLOW_OK;
if (wavenc->channels <= 0) {
GST_ERROR_OBJECT (wavenc, "Got data without caps");
return GST_FLOW_NOT_NEGOTIATED;
}
if (G_UNLIKELY (!wavenc->sent_header)) {
GstStructure *s;
GstCaps *caps = gst_pad_get_allowed_caps (wavenc->srcpad);
GST_DEBUG_OBJECT (wavenc, "allowed src caps: %" GST_PTR_FORMAT, caps);
if (!gst_caps_is_fixed (caps)) {
caps = gst_caps_truncate (caps);
}
s = gst_caps_get_structure (caps, 0);
wavenc->use_rf64 = gst_structure_has_name (s, "audio/x-rf64");
gst_pad_set_caps (wavenc->srcpad, caps);
gst_caps_unref (caps);
/* starting a file, means we have to finish it properly */
wavenc->finished_properly = FALSE;
/* push initial bogus header, it will be updated on EOS */
flow = gst_wavenc_push_header (wavenc);
if (flow != GST_FLOW_OK) {
GST_WARNING_OBJECT (wavenc, "error pushing header: %s",
gst_flow_get_name (flow));
return flow;
}
GST_DEBUG_OBJECT (wavenc, "wrote dummy header");
wavenc->audio_length = 0;
wavenc->sent_header = TRUE;
}
GST_LOG_OBJECT (wavenc,
"pushing %" G_GSIZE_FORMAT " bytes raw audio, ts=%" GST_TIME_FORMAT,
gst_buffer_get_size (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
buf = gst_buffer_make_writable (buf);
GST_BUFFER_OFFSET (buf) = get_header_len (wavenc) + wavenc->audio_length;
GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
wavenc->audio_length += gst_buffer_get_size (buf);
if (wavenc->channel_mask != 0 &&
!gst_audio_buffer_reorder_channels (buf, wavenc->audio_format,
wavenc->channels, wavenc->srcPos, wavenc->destPos)) {
GST_WARNING_OBJECT (wavenc, "Could not reorder channels");
}
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;
/* use bogus size initially, we'll write the real
* header when we get EOS and know the exact length */
wavenc->audio_length = 0x7FFF0000;
wavenc->meta_length = 0;
wavenc->sent_header = FALSE;
/* its true because we haven't written anything */
wavenc->finished_properly = TRUE;
break;
default:
break;
}
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;
case GST_STATE_CHANGE_READY_TO_NULL:
GST_DEBUG_OBJECT (wavenc, "tags: %p", wavenc->tags);
if (wavenc->tags) {
gst_tag_list_unref (wavenc->tags);
wavenc->tags = NULL;
}
GST_DEBUG_OBJECT (wavenc, "toc: %p", wavenc->toc);
if (wavenc->toc) {
gst_toc_unref (wavenc->toc);
wavenc->toc = NULL;
}
gst_tag_setter_reset_tags (GST_TAG_SETTER (wavenc));
gst_toc_setter_reset (GST_TOC_SETTER (wavenc));
break;
default:
break;
}
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
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)
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