--- /dev/null
+/* GStreamer
+ * Copyright (C) <2002> Iain Holmes <iain@prettypeople.org>
+ */
+
+#include <string.h>
+#include <gstwavenc.h>
+
+static void gst_wavenc_class_init (GstWavEncClass *klass);
+static void gst_wavenc_init (GstWavEnc *wavenc);
+static void gst_wavenc_chain (GstPad *pad, GstBuffer *buf);
+
+#define WAVE_FORMAT_PCM 0x0001
+
+#define WRITE_U32(buf, x) *(buf) = (unsigned char) (x&0xff);\
+*((buf)+1) = (unsigned char)((x>>8)&0xff);\
+*((buf)+2) = (unsigned char)((x>>16)&0xff);\
+*((buf)+3) = (unsigned char)((x>>24)&0xff);
+
+#define WRITE_U16(buf, x) *(buf) = (unsigned char) (x&0xff);\
+*((buf)+1) = (unsigned char)((x>>8)&0xff);
+
+struct riff_struct {
+ unsigned char id[4]; /* RIFF */
+ unsigned int len;
+ unsigned char wav_id[4]; /* WAVE */
+};
+
+struct chunk_struct {
+ unsigned char id[4];
+ unsigned int len;
+};
+
+struct common_struct {
+ unsigned short wFormatTag;
+ unsigned short wChannels;
+ unsigned int dwSamplesPerSec;
+ unsigned int dwAvgBytesPerSec;
+ unsigned short wBlockAlign;
+ unsigned short wBitsPerSample; /* Only for PCM */
+};
+
+struct wave_header {
+ struct riff_struct riff;
+ struct chunk_struct format;
+ struct common_struct common;
+ struct chunk_struct data;
+};
+
+static GstElementDetails gst_wavenc_details = {
+ "WAV encoder",
+ "Codec/Encoder",
+ "GPL",
+ "Encode raw audio into WAV",
+ VERSION,
+ "Iain Holmes <iain@prettypeople.org>",
+ "(C) 2002",
+};
+
+static GstPadTemplate *srctemplate, *sinktemplate;
+
+static GstPadTemplate *
+sink_factory (void)
+{
+ return gst_pad_template_new ("wavenc_sink",
+ GST_PAD_SINK,
+ GST_PAD_ALWAYS,
+ gst_caps_new ("wavenc_raw",
+ "audio/raw",
+ gst_props_new ("format", GST_PROPS_STRING ("int"),
+ "law", GST_PROPS_INT (0),
+ "endianness", GST_PROPS_INT (G_BYTE_ORDER),
+ "signed", GST_PROPS_BOOLEAN (TRUE),
+ "width", GST_PROPS_INT (16),
+ "depth", GST_PROPS_INT (16),
+ "rate", GST_PROPS_INT_RANGE (8000, 48000),
+ "channels", GST_PROPS_INT_RANGE (1, 2),
+ NULL)),
+ NULL);
+}
+
+static GstPadTemplate *
+src_factory (void)
+{
+ return gst_pad_template_new ("wavenc_src",
+ GST_PAD_SRC,
+ GST_PAD_ALWAYS,
+ gst_caps_new ("wavenc_wav",
+ "audio/x-wav",
+ NULL),
+ NULL);
+}
+
+static GstElementClass *parent_class = NULL;
+
+GType
+gst_wavenc_get_type (void)
+{
+ static GType type = 0;
+
+ if (type == 0) {
+ static const GTypeInfo info = {
+ sizeof (GstWavEncClass), NULL, NULL,
+ (GClassInitFunc) gst_wavenc_class_init, NULL, NULL,
+ sizeof (GstWavEnc), 0, (GInstanceInitFunc) gst_wavenc_init
+ };
+
+ type = g_type_register_static (GST_TYPE_ELEMENT, "GstWavEnc", &info, 0);
+ }
+
+ return type;
+}
+
+static GstElementStateReturn
+gst_wavenc_change_state (GstElement *element)
+{
+ GstWavEnc *wavenc = GST_WAVENC (element);
+
+ switch (GST_STATE_TRANSITION (element)) {
+ case GST_STATE_NULL_TO_READY:
+ case GST_STATE_READY_TO_PAUSED:
+ wavenc->setup = FALSE;
+ break;
+
+ default:
+ break;
+ }
+
+ if (parent_class->change_state) {
+ return parent_class->change_state (element);
+ }
+
+ return GST_STATE_SUCCESS;
+}
+
+static void
+gst_wavenc_class_init (GstWavEncClass *klass)
+{
+ GstElementClass *element_class;
+
+ element_class = (GstElementClass *) klass;
+ element_class->change_state = gst_wavenc_change_state;
+
+ parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
+}
+
+static gboolean
+gst_wavenc_setup (GstWavEnc *wavenc)
+{
+ struct wave_header wave;
+ int size = 0x7fffffff; /* Use a bogus size initially */
+
+ wave.common.wChannels = wavenc->channels;
+ wave.common.wBitsPerSample = wavenc->bits;
+ wave.common.dwSamplesPerSec = wavenc->rate;
+
+ memset (wavenc->header, 0, WAV_HEADER_LEN);
+
+ /* Fill out our wav-header with some information */
+ strncpy (wave.riff.id, "RIFF", 4);
+ wave.riff.len = size - 8;
+ strncpy (wave.riff.wav_id, "WAVE", 4);
+
+ strncpy (wave.format.id, "fmt ", 4);
+ wave.format.len = 16;
+
+ wave.common.wFormatTag = WAVE_FORMAT_PCM;
+ wave.common.dwAvgBytesPerSec = wave.common.wChannels * wave.common.dwSamplesPerSec * (wave.common.wBitsPerSample >> 3);
+ wave.common.wBlockAlign = wave.common.wChannels * (wave.common.wBitsPerSample >> 3);
+
+ strncpy (wave.data.id, "data", 4);
+ wave.data.len = size - 44;
+
+ strncpy (wavenc->header, wave.riff.id, 4);
+ WRITE_U32 (wavenc->header + 4, wave.riff.len);
+ strncpy (wavenc->header + 8, wave.riff.wav_id, 4);
+ strncpy (wavenc->header + 12, wave.format.id, 4);
+ WRITE_U32 (wavenc->header + 16, wave.format.len);
+ WRITE_U16 (wavenc->header + 20, wave.common.wFormatTag);
+ WRITE_U16 (wavenc->header + 22, wave.common.wChannels);
+ WRITE_U32 (wavenc->header + 24, wave.common.dwSamplesPerSec);
+ WRITE_U32 (wavenc->header + 28, wave.common.dwAvgBytesPerSec);
+ WRITE_U16 (wavenc->header + 32, wave.common.wBlockAlign);
+ WRITE_U16 (wavenc->header + 34, wave.common.wBitsPerSample);
+ strncpy (wavenc->header + 36, wave.data.id, 4);
+ WRITE_U32 (wavenc->header + 40, wave.data.len);
+
+ wavenc->setup = TRUE;
+ return TRUE;
+}
+
+static GstPadConnectReturn
+gst_wavenc_sinkconnect (GstPad *pad,
+ GstCaps *caps)
+{
+ GstWavEnc *wavenc;
+
+ wavenc = GST_WAVENC (gst_pad_get_parent (pad));
+
+ if (!GST_CAPS_IS_FIXED (caps)) {
+ return GST_PAD_CONNECT_DELAYED;
+ }
+
+ gst_caps_get_int (caps, "channels", &wavenc->channels);
+ gst_caps_get_int (caps, "rate", &wavenc->rate);
+ gst_caps_get_int (caps, "depth", &wavenc->bits);
+
+ gst_wavenc_setup (wavenc);
+
+ if (wavenc->setup) {
+ return GST_PAD_CONNECT_OK;
+ }
+
+ return GST_PAD_CONNECT_REFUSED;
+}
+
+static void
+gst_wavenc_init (GstWavEnc *wavenc)
+{
+ wavenc->sinkpad = gst_pad_new_from_template (sinktemplate, "sink");
+ gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->sinkpad);
+ gst_pad_set_chain_function (wavenc->sinkpad, gst_wavenc_chain);
+ gst_pad_set_connect_function (wavenc->sinkpad, gst_wavenc_sinkconnect);
+
+ wavenc->srcpad = gst_pad_new_from_template (srctemplate, "src");
+ gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->srcpad);
+
+ wavenc->setup = FALSE;
+ wavenc->flush_header = TRUE;
+}
+
+static void
+gst_wavenc_chain (GstPad *pad,
+ GstBuffer *buf)
+{
+ GstWavEnc *wavenc;
+
+ wavenc = GST_WAVENC (gst_pad_get_parent (pad));
+
+ if (GST_IS_EVENT (buf)) {
+ GstEvent *event = GST_EVENT (buf);
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_EOS:
+ /* Should do something... */
+ gst_event_unref (event);
+
+ gst_pad_push (wavenc->srcpad, GST_BUFFER (gst_event_new (GST_EVENT_EOS)));
+ gst_element_set_eos (GST_ELEMENT (wavenc));
+ break;
+
+ default:
+ gst_pad_event_default (pad, event);
+ return;
+ }
+ } else {
+ if (!wavenc->setup) {
+ gst_buffer_unref (buf);
+ gst_element_error (GST_ELEMENT (wavenc), "encoder not initialised (input is not audio?)");
+ return;
+ }
+
+ if (wavenc->flush_header) {
+ GstBuffer *outbuf;
+
+ outbuf = gst_buffer_new_and_alloc (WAV_HEADER_LEN);
+ memcpy (GST_BUFFER_DATA (outbuf), wavenc->header, WAV_HEADER_LEN);
+
+ if (GST_PAD_IS_USABLE (wavenc->srcpad)) {
+ gst_pad_push (wavenc->srcpad, outbuf);
+ } else {
+ gst_buffer_unref (outbuf);
+ }
+
+ wavenc->flush_header = FALSE;
+ }
+
+ gst_pad_push (wavenc->srcpad, buf);
+ }
+}
+
+static gboolean
+plugin_init (GModule *module,
+ GstPlugin *plugin)
+{
+ GstElementFactory *factory;
+
+ factory = gst_element_factory_new ("wavenc", GST_TYPE_WAVENC,
+ &gst_wavenc_details);
+
+ srctemplate = src_factory ();
+ gst_element_factory_add_pad_template (factory, srctemplate);
+
+ sinktemplate = sink_factory ();
+ gst_element_factory_add_pad_template (factory, sinktemplate);
+
+ gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
+
+ return TRUE;
+}
+
+GstPluginDesc plugin_desc = {
+ GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "wavenc",
+ plugin_init
+};
+
--- /dev/null
+/* GStreamer
+ * Copyright (C) 2002, Iain Holmes <iain@prettypeople.org>
+ *
+ * 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., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+
+#ifndef __GST_WAVENC_H__
+#define __GST_WAVENC_H__
+
+
+#include <config.h>
+#include <gst/gst.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+#define GST_TYPE_WAVENC \
+ (gst_wavenc_get_type())
+#define GST_WAVENC(obj) \
+ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_WAVENC,GstWavEnc))
+#define GST_WAVENC_CLASS(klass) \
+ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_WAVENC,GstWavEnc))
+#define GST_IS_WAVENC(obj) \
+ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_WAVENC))
+#define GST_IS_WAVENC_CLASS(obj) \
+ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_WAVENC))
+
+typedef struct _GstWavEnc GstWavEnc;
+typedef struct _GstWavEncClass GstWavEncClass;
+
+#define WAV_HEADER_LEN 44
+
+struct _GstWavEnc {
+ GstElement element;
+
+ /* pads */
+ GstPad *sinkpad,*srcpad;
+
+ /* useful audio data */
+ guint bits;
+ guint rate;
+ guint channels;
+ guint width;
+
+ gboolean setup, flush_header;
+ guchar header[WAV_HEADER_LEN];
+};
+
+struct _GstWavEncClass {
+ GstElementClass parent_class;
+};
+
+GType gst_wavenc_get_type(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GST_ENC_H__ */
projects / platform / upstream / gst-plugins-good.git / commitdiff