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Diffstat (limited to 'src/combined/xine_speex_decoder.c')
-rw-r--r--src/combined/xine_speex_decoder.c404
1 files changed, 404 insertions, 0 deletions
diff --git a/src/combined/xine_speex_decoder.c b/src/combined/xine_speex_decoder.c
new file mode 100644
index 000000000..acdf5e394
--- /dev/null
+++ b/src/combined/xine_speex_decoder.c
@@ -0,0 +1,404 @@
+/*
+ * Copyright (C) 2000-2003 the xine project
+ *
+ * This file is part of xine, a free video player.
+ *
+ * xine is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * xine 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * (ogg/)speex audio decoder plugin (libspeex wrapper) for xine
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#define LOG_MODULE "speex_decoder"
+#define LOG_VERBOSE
+/*
+#define LOG
+*/
+#define LOG_BUFFERS 0
+
+#include <xine/xine_internal.h>
+#include <xine/audio_out.h>
+#include <xine/buffer.h>
+
+#include <ogg/ogg.h>
+
+#include <speex/speex.h>
+#include <speex/speex_header.h>
+#include <speex/speex_callbacks.h>
+#include <speex/speex_stereo.h>
+
+#define MAX_FRAME_SIZE 2000
+
+typedef struct {
+ audio_decoder_class_t decoder_class;
+} speex_class_t;
+
+typedef struct speex_decoder_s {
+ audio_decoder_t audio_decoder;
+
+ int64_t pts;
+
+ int output_sampling_rate;
+ int output_open;
+ int output_mode;
+
+ /* speex stuff */
+ void *st;
+ int frame_size;
+ int rate;
+ int nframes;
+ int channels;
+ SpeexBits bits;
+ SpeexStereoState stereo;
+ int expect_metadata;
+
+ int header_count;
+
+ xine_stream_t *stream;
+
+} speex_decoder_t;
+
+
+static void speex_reset (audio_decoder_t *this_gen) {
+
+ speex_decoder_t *this = (speex_decoder_t *) this_gen;
+
+ speex_bits_init (&this->bits);
+}
+
+static void speex_discontinuity (audio_decoder_t *this_gen) {
+
+ speex_decoder_t *this = (speex_decoder_t *) this_gen;
+
+ this->pts=0;
+}
+
+/* Known speex comment keys from ogg123 sources*/
+static const struct {
+ char key[16]; /* includes the '=' for programming convenience */
+ int xine_metainfo_index;
+} speex_comment_keys[] = {
+ {"ARTIST=", XINE_META_INFO_ARTIST},
+ {"ALBUM=", XINE_META_INFO_ALBUM},
+ {"TITLE=", XINE_META_INFO_TITLE},
+ {"GENRE=", XINE_META_INFO_GENRE},
+ {"DESCRIPTION=", XINE_META_INFO_COMMENT},
+ {"DATE=", XINE_META_INFO_YEAR}
+};
+
+#define readint(buf, base) (((buf[base+3]<<24)&0xff000000)| \
+ ((buf[base+2]<<16)&0xff0000)| \
+ ((buf[base+1]<<8)&0xff00)| \
+ (buf[base]&0xff))
+
+static
+void read_metadata (speex_decoder_t *this, char * comments, int length)
+{
+ char * c = comments;
+ int len, i, nb_fields;
+ char * end;
+
+ _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "speex");
+
+ if (length < 8) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: invalid/corrupted comments\n");
+ return;
+ }
+
+ end = c+length;
+ len = readint (c, 0);
+ c += 4;
+
+ if (c+len > end) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: invalid/corrupted comments\n");
+ return;
+ }
+
+#ifdef LOG
+ /* Encoder */
+ printf ("libspeex: ");
+ fwrite (c, 1, len, stdout);
+ printf ("\n");
+#endif
+
+ c += len;
+
+ if (c+4 > end) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: invalid/corrupted comments\n");
+ return;
+ }
+
+ nb_fields = readint (c, 0);
+ c += 4;
+
+ for (i = 0; i < nb_fields; i++) {
+ if (c+4 > end) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: invalid/corrupted comments\n");
+ return;
+ }
+
+ len = readint (c, 0);
+ c += 4;
+ if (c+len > end) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: invalid/corrupted comments\n");
+ return;
+ }
+
+#ifdef LOG
+ printf ("libspeex: ");
+ fwrite (c, 1, len, stdout);
+ printf ("\n");
+#endif
+
+ for (i = 0; i < (sizeof(speex_comment_keys)/sizeof(speex_comment_keys[0])); i++) {
+ size_t keylen = strlen(speex_comment_keys[i].key);
+
+ if ( !strncasecmp (speex_comment_keys[i].key, c,
+ keylen) ) {
+ char meta_info[(len - keylen) + 1];
+
+ lprintf ("known metadata %d %d\n",
+ i, speex_comment_keys[i].xine_metainfo_index);
+
+ strncpy(meta_info, &c[keylen], len-keylen);
+ _x_meta_info_set_utf8(this->stream, speex_comment_keys[i].xine_metainfo_index, meta_info);
+ }
+ }
+
+ c += len;
+ }
+}
+
+static void speex_decode_data (audio_decoder_t *this_gen, buf_element_t *buf) {
+
+ speex_decoder_t *this = (speex_decoder_t *) this_gen;
+ char *const buf_content = (char*)buf->content;
+
+ llprintf (LOG_BUFFERS, "decode buf=%8p content=%8p flags=%08x\n",
+ buf, buf->content, buf->decoder_flags);
+
+ if ( (buf->decoder_flags & BUF_FLAG_HEADER) &&
+ !(buf->decoder_flags & BUF_FLAG_STDHEADER) ) {
+ lprintf ("preview buffer, %d headers to go\n", this->header_count);
+
+ if (this->header_count) {
+
+ if (!this->st) {
+ SpeexMode * spx_mode;
+ SpeexHeader * spx_header;
+ unsigned int modeID;
+ int bitrate;
+
+ speex_bits_init (&this->bits);
+
+ spx_header = speex_packet_to_header (buf_content, buf->size);
+
+ if (!spx_header) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: could not read Speex header\n");
+ return;
+ }
+
+ modeID = (unsigned int)spx_header->mode;
+ if (modeID >= SPEEX_NB_MODES) {
+ xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG, LOG_MODULE ": invalid mode ID %u\n", modeID);
+ return;
+ }
+
+ spx_mode = (SpeexMode *) speex_mode_list[modeID];
+
+ if (spx_mode->bitstream_version != spx_header->mode_bitstream_version) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: incompatible Speex mode bitstream version\n");
+ return;
+ }
+
+ this->st = speex_decoder_init (spx_mode);
+ if (!this->st) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: decoder initialization failed\n");
+ return;
+ }
+
+ this->rate = spx_header->rate;
+ speex_decoder_ctl (this->st, SPEEX_SET_SAMPLING_RATE, &this->rate);
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_SAMPLERATE,
+ this->rate);
+
+ this->channels = spx_header->nb_channels;
+ if (this->channels == 2) {
+ SpeexCallback callback;
+
+ callback.callback_id = SPEEX_INBAND_STEREO;
+ callback.func = speex_std_stereo_request_handler;
+ callback.data = &this->stereo;
+ speex_decoder_ctl (this->st, SPEEX_SET_HANDLER, &callback);
+ }
+
+ this->nframes = spx_header->frames_per_packet;
+ if (!this->nframes) this->nframes = 1;
+
+ speex_decoder_ctl (this->st, SPEEX_GET_FRAME_SIZE, &this->frame_size);
+
+ speex_decoder_ctl (this->st, SPEEX_GET_BITRATE, &bitrate);
+ if (bitrate <= 1) bitrate = 16000; /* assume 16 kbit */
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_BITRATE, bitrate);
+
+ this->header_count += spx_header->extra_headers;
+ this->expect_metadata = 1;
+
+ free (spx_header);
+ } else if (this->expect_metadata) {
+ read_metadata (this, buf_content, buf->size);
+ }
+
+ this->header_count--;
+
+ if (!this->header_count) {
+ int mode = _x_ao_channels2mode(this->channels);
+
+ if (!this->output_open) {
+ this->output_open =
+ (this->stream->audio_out->open) (this->stream->audio_out,
+ this->stream,
+ 16,
+ this->rate,
+ mode);
+ lprintf ("this->output_open after attempt is %d\n", this->output_open);
+ }
+ }
+ }
+
+ } else if (this->output_open) {
+ int j;
+
+ audio_buffer_t *audio_buffer;
+
+ audio_buffer =
+ this->stream->audio_out->get_buffer (this->stream->audio_out);
+
+ speex_bits_read_from (&this->bits, buf_content, buf->size);
+
+ for (j = 0; j < this->nframes; j++) {
+ int ret;
+ int bitrate;
+
+ ret = speex_decode_int (this->st, &this->bits, audio_buffer->mem);
+
+ if (ret==-1)
+ break;
+ if (ret==-2) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: Decoding error, corrupted stream?\n");
+ break;
+ }
+ if (speex_bits_remaining(&this->bits)<0) {
+ xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "libspeex: Decoding overflow, corrupted stream?\n");
+ break;
+ }
+
+ if (this->channels == 2) {
+ speex_decode_stereo_int (audio_buffer->mem, this->frame_size, &this->stereo);
+ }
+
+ speex_decoder_ctl (this->st, SPEEX_GET_BITRATE, &bitrate);
+ if (bitrate <= 1) bitrate = 16000; /* assume 16 kbit */
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_BITRATE, bitrate);
+
+ audio_buffer->vpts = this->pts;
+ this->pts=0;
+ audio_buffer->num_frames = this->frame_size;
+
+ this->stream->audio_out->put_buffer (this->stream->audio_out, audio_buffer, this->stream);
+
+ buf->pts=0;
+
+ }
+ }
+ else {
+ llprintf (LOG_BUFFERS, "output not open\n");
+ }
+}
+
+static void speex_dispose (audio_decoder_t *this_gen) {
+
+ speex_decoder_t *this = (speex_decoder_t *) this_gen;
+
+ if (this->st) {
+ speex_decoder_destroy (this->st);
+ }
+ speex_bits_destroy (&this->bits);
+
+ if (this->output_open)
+ this->stream->audio_out->close (this->stream->audio_out, this->stream);
+
+ free (this_gen);
+}
+
+static audio_decoder_t *open_plugin (audio_decoder_class_t *class_gen,
+ xine_stream_t *stream) {
+
+ speex_decoder_t *this ;
+ static SpeexStereoState init_stereo = SPEEX_STEREO_STATE_INIT;
+
+ this = (speex_decoder_t *) calloc(1, sizeof(speex_decoder_t));
+
+ this->audio_decoder.decode_data = speex_decode_data;
+ this->audio_decoder.reset = speex_reset;
+ this->audio_decoder.discontinuity = speex_discontinuity;
+ this->audio_decoder.dispose = speex_dispose;
+ this->stream = stream;
+
+ this->output_open = 0;
+ this->header_count = 1;
+ this->expect_metadata = 0;
+
+ this->st = NULL;
+
+ this->channels = 1;
+
+ memcpy (&this->stereo, &init_stereo, sizeof (SpeexStereoState));
+
+ return (audio_decoder_t *) this;
+}
+
+/*
+ * speex plugin class
+ */
+
+void *speex_init_plugin (xine_t *xine, void *data) {
+
+ speex_class_t *this;
+
+ this = (speex_class_t *) calloc(1, sizeof(speex_class_t));
+
+ this->decoder_class.open_plugin = open_plugin;
+ this->decoder_class.identifier = "speex";
+ this->decoder_class.description = N_("Speex audio decoder plugin");
+ this->decoder_class.dispose = default_audio_decoder_class_dispose;
+
+ return this;
+}
+
+static const uint32_t audio_types[] = {
+ BUF_AUDIO_SPEEX, 0
+ };
+
+const decoder_info_t dec_info_speex = {
+ audio_types, /* supported types */
+ 5 /* priority */
+};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 18:03:57 +0000