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-rw-r--r--src/demuxers/demux_wav.c500
1 files changed, 500 insertions, 0 deletions
diff --git a/src/demuxers/demux_wav.c b/src/demuxers/demux_wav.c
new file mode 100644
index 000000000..91919b9c2
--- /dev/null
+++ b/src/demuxers/demux_wav.c
@@ -0,0 +1,500 @@
+/*
+ * Copyright (C) 2001-2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * MS WAV File Demuxer by Mike Melanson (melanson@pcisys.net)
+ * based on WAV specs that are available far and wide
+ *
+ * $Id: demux_wav.c,v 1.1 2002/07/07 01:24:40 tmmm Exp $
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "demux.h"
+#include "buffer.h"
+#include "bswap.h"
+
+#define LE_16(x) (le2me_16(*(uint16_t *)(x)))
+#define LE_32(x) (le2me_32(*(uint32_t *)(x)))
+
+#define VALID_ENDS "wav"
+#define WAV_SIGNATURE_SIZE 16
+#define WAV_HEADER_MAX_SIZE 0x14
+/* this is the hex value for 'data' */
+#define data_TAG 0x61746164
+#define PCM_BLOCK_ALIGN 1024
+
+typedef struct {
+
+ demux_plugin_t demux_plugin;
+
+ xine_t *xine;
+
+ config_values_t *config;
+
+ fifo_buffer_t *video_fifo;
+ fifo_buffer_t *audio_fifo;
+
+ input_plugin_t *input;
+
+ pthread_t thread;
+ int thread_running;
+ pthread_mutex_t mutex;
+ int send_end_buffers;
+ int status;
+
+ xine_waveformatex wave;
+ unsigned int audio_type;
+
+ off_t data_start;
+ off_t data_size;
+ off_t data_end;
+
+ int seek_flag; /* this is set when a seek just occurred */
+} demux_wav_t;
+
+static void *demux_wav_loop (void *this_gen) {
+
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+ buf_element_t *buf = NULL;
+ unsigned int remaining_sample_bytes;
+ off_t current_file_pos;
+ int64_t current_pts;
+
+ pthread_mutex_lock( &this->mutex );
+ this->seek_flag = 1;
+
+ /* do-while needed to seek after demux finished */
+ do {
+ /* main demuxer loop */
+ while (this->status == DEMUX_OK) {
+
+ /* someone may want to interrupt us */
+ pthread_mutex_unlock( &this->mutex );
+ pthread_mutex_lock( &this->mutex );
+
+ /* just load data chunks from wherever the stream happens to be
+ * pointing; issue a DEMUX_FINISHED status is EOF is reached */
+ remaining_sample_bytes = this->wave.nBlockAlign;
+ current_file_pos = this->input->get_current_pos(this->input);
+
+ current_pts = current_file_pos;
+ current_pts -= this->data_start;
+ current_pts *= 90000;
+ current_pts /= this->wave.nAvgBytesPerSec;
+
+ if (this->seek_flag) {
+ xine_demux_control_newpts(this->xine, current_pts, 0);
+ this->seek_flag = 0;
+ }
+
+ while (remaining_sample_bytes) {
+ buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+ buf->content = buf->mem;
+ buf->type = this->audio_type;
+ buf->input_pos = current_file_pos;
+ buf->input_length = this->data_end;
+ buf->input_time = current_pts / 90000;
+ buf->pts = current_pts;
+ buf->decoder_flags = 0;
+
+ if (remaining_sample_bytes > buf->max_size)
+ buf->size = buf->max_size;
+ else
+ buf->size = remaining_sample_bytes;
+ remaining_sample_bytes -= buf->size;
+
+ if (this->input->read(this->input, buf->content, buf->size) !=
+ buf->size) {
+ this->status = DEMUX_FINISHED;
+ break;
+ }
+
+ if (!remaining_sample_bytes)
+ buf->decoder_flags |= BUF_FLAG_FRAME_END;
+
+ buf->decoder_info[1] = this->wave.nSamplesPerSec;
+ buf->decoder_info[2] = this->wave.wBitsPerSample;
+ buf->decoder_info[3] = this->wave.nChannels;
+ this->audio_fifo->put (this->audio_fifo, buf);
+ }
+ }
+
+ /* wait before sending end buffers: user might want to do a new seek */
+ while(this->send_end_buffers && this->video_fifo->size(this->video_fifo) &&
+ this->status != DEMUX_OK){
+ pthread_mutex_unlock( &this->mutex );
+ xine_usec_sleep(100000);
+ pthread_mutex_lock( &this->mutex );
+ }
+
+ } while (this->status == DEMUX_OK);
+
+ printf ("demux_wav: demux loop finished (status: %d)\n",
+ this->status);
+
+ this->status = DEMUX_FINISHED;
+
+ if (this->send_end_buffers) {
+ xine_demux_control_end(this->xine, BUF_FLAG_END_STREAM);
+ }
+
+ this->thread_running = 0;
+ pthread_mutex_unlock(&this->mutex);
+ return NULL;
+}
+
+static int demux_wav_open(demux_plugin_t *this_gen,
+ input_plugin_t *input, int stage) {
+
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+ unsigned char signature[WAV_SIGNATURE_SIZE];
+
+ this->input = input;
+
+ switch(stage) {
+ case STAGE_BY_CONTENT: {
+ if ((input->get_capabilities(input) & INPUT_CAP_SEEKABLE) == 0)
+ return DEMUX_CANNOT_HANDLE;
+
+ input->seek(input, 0, SEEK_SET);
+ if (input->read(input, signature, WAV_SIGNATURE_SIZE) !=
+ WAV_SIGNATURE_SIZE)
+ return DEMUX_CANNOT_HANDLE;
+
+ /* check the signature */
+ if ((signature[0] == 'R') &&
+ (signature[1] == 'I') &&
+ (signature[2] == 'F') &&
+ (signature[3] == 'F') &&
+ (signature[8] == 'W') &&
+ (signature[9] == 'A') &&
+ (signature[10] == 'V') &&
+ (signature[11] == 'E') &&
+ (signature[12] == 'f') &&
+ (signature[13] == 'm') &&
+ (signature[14] == 't') &&
+ (signature[15] == ' '))
+ return DEMUX_CAN_HANDLE;
+
+ return DEMUX_CANNOT_HANDLE;
+ }
+ break;
+
+ case STAGE_BY_EXTENSION: {
+ char *suffix;
+ char *MRL;
+ char *m, *valid_ends;
+
+ MRL = input->get_mrl (input);
+
+ suffix = strrchr(MRL, '.');
+
+ if(!suffix)
+ return DEMUX_CANNOT_HANDLE;
+
+ xine_strdupa(valid_ends, (this->config->register_string(this->config,
+ "mrl.ends_wav", VALID_ENDS,
+ _("valid mrls ending for wav demuxer"),
+ NULL, NULL, NULL))); while((m = xine_strsep(&valid_ends, ",")) != NULL) {
+
+ while(*m == ' ' || *m == '\t') m++;
+
+ if(!strcasecmp((suffix + 1), m)) {
+ this->input = input;
+ return DEMUX_CAN_HANDLE;
+ }
+ }
+ return DEMUX_CANNOT_HANDLE;
+ }
+ break;
+
+ default:
+ return DEMUX_CANNOT_HANDLE;
+ break;
+ }
+
+ return DEMUX_CANNOT_HANDLE;
+}
+
+static int demux_wav_start (demux_plugin_t *this_gen,
+ fifo_buffer_t *video_fifo,
+ fifo_buffer_t *audio_fifo,
+ off_t start_pos, int start_time) {
+
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+ buf_element_t *buf;
+ int err;
+ unsigned int chunk_tag;
+ unsigned int chunk_size;
+ unsigned char chunk_preamble[8];
+ unsigned int wav_header_size;
+ unsigned char wav_header[WAV_HEADER_MAX_SIZE];
+
+ pthread_mutex_lock(&this->mutex);
+
+ /* if thread is not running, initialize demuxer */
+ if (!this->thread_running) {
+ this->video_fifo = video_fifo;
+ this->audio_fifo = audio_fifo;
+
+ /* go straight for the format structure */
+ this->input->seek(this->input, WAV_SIGNATURE_SIZE, SEEK_SET);
+ if (this->input->read(this->input,
+ (unsigned char *)&wav_header_size, 4) != 4) {
+ this->status = DEMUX_FINISHED;
+ pthread_mutex_unlock(&this->mutex);
+ return this->status;
+ }
+ wav_header_size = le2me_32(wav_header_size);
+ if (this->input->read(this->input, wav_header, wav_header_size) !=
+ wav_header_size) {
+ this->status = DEMUX_FINISHED;
+ pthread_mutex_unlock(&this->mutex);
+ return this->status;
+ }
+ memcpy(&this->wave, wav_header, sizeof(this->wave));
+ xine_waveformatex_le2me(&this->wave);
+ this->audio_type = formattag_to_buf_audio(this->wave.wFormatTag);
+ if(!this->audio_type) {
+ xine_report_codec( this->xine, XINE_CODEC_AUDIO, this->audio_type, 0, 0);
+ this->status = DEMUX_FINISHED;
+ pthread_mutex_unlock(&this->mutex);
+ return this->status;
+ }
+
+ /* traverse through the chunks to find the 'data' chunk */
+ this->data_start = this->data_size = this->data_end = 0;
+ while (this->data_start == 0) {
+
+ if (this->input->read(this->input, chunk_preamble, 8) != 8) {
+ this->status = DEMUX_FINISHED;
+ pthread_mutex_unlock(&this->mutex);
+ return this->status;
+ }
+ chunk_tag = LE_32(&chunk_preamble[0]);
+ chunk_size = LE_32(&chunk_preamble[4]);
+
+ if (chunk_tag == data_TAG) {
+ this->data_start = this->input->get_current_pos(this->input);
+ this->data_size = chunk_size;
+ this->data_end = this->data_start + chunk_size;
+ } else {
+ this->input->seek(this->input, chunk_size, SEEK_CUR);
+ }
+ }
+
+ /* print vital stats */
+ xine_log(this->xine, XINE_LOG_FORMAT,
+ _("demux_wav: format 0x%X audio, %d Hz, %d bits/sample, %d channel%c\n"),
+ this->wave.wFormatTag,
+ this->wave.nSamplesPerSec,
+ this->wave.wBitsPerSample,
+ this->wave.nChannels,
+ (this->wave.nChannels == 1) ? ' ' : 's');
+ xine_log(this->xine, XINE_LOG_FORMAT,
+ _("demux_wav: running time = %d min, %d sec\n"),
+ this->data_size / this->wave.nAvgBytesPerSec / 60,
+ this->data_size / this->wave.nAvgBytesPerSec % 60);
+ xine_log(this->xine, XINE_LOG_FORMAT,
+ _("demux_wav: average bytes/sec = %d, block alignment = %d\n"),
+ this->wave.nAvgBytesPerSec,
+ this->wave.nBlockAlign);
+
+ /* special block alignment hack so that the demuxer doesn't send
+ * packets with individual PCM samples */
+ if ((this->wave.nAvgBytesPerSec / this->wave.nBlockAlign) ==
+ this->wave.nSamplesPerSec)
+ this->wave.nBlockAlign = PCM_BLOCK_ALIGN;
+
+ /* send start buffers */
+ xine_demux_control_start(this->xine);
+
+ /* send init info to decoders */
+ if (this->audio_fifo && this->audio_type) {
+ buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+ buf->content = buf->mem;
+ buf->type = this->audio_type;
+ buf->decoder_flags = BUF_FLAG_HEADER;
+ buf->decoder_info[0] = 0;
+ buf->decoder_info[1] = this->wave.nSamplesPerSec;
+ buf->decoder_info[2] = this->wave.wBitsPerSample;
+ buf->decoder_info[3] = this->wave.nChannels;
+ memcpy(buf->content, &this->wave, sizeof(this->wave));
+ buf->size = sizeof(this->wave);
+ this->audio_fifo->put (this->audio_fifo, buf);
+ }
+
+ this->status = DEMUX_OK;
+ this->send_end_buffers = 1;
+ this->thread_running = 1;
+
+ if ((err = pthread_create (&this->thread, NULL, demux_wav_loop, this)) != 0) {
+ printf ("demux_wav: can't create new thread (%s)\n", strerror(err));
+ abort();
+ }
+ }
+
+ pthread_mutex_unlock(&this->mutex);
+
+ return this->status;
+}
+
+static int demux_wav_seek (demux_plugin_t *this_gen,
+ off_t start_pos, int start_time) {
+
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+ int status;
+ off_t data_offset;
+
+ pthread_mutex_lock(&this->mutex);
+
+ /* check the boundary offsets */
+ if (start_pos < this->data_start)
+ this->input->seek(this->input, this->data_start, SEEK_SET);
+ else if (start_pos >= this->data_end) {
+ this->status = DEMUX_FINISHED;
+ status = this->status;
+ pthread_mutex_unlock(&this->mutex);
+ return status;
+ } else {
+ /* This function must seek along the block alignment. Determine how
+ * far into the data the requested offset lies, divide the diff
+ * by the block alignment integer-wise, and multiply that by the
+ * block alignment to get the new aligned offset. */
+ data_offset = start_pos - this->data_start;
+ data_offset /= this->wave.nBlockAlign;
+ data_offset *= this->wave.nBlockAlign;
+ data_offset += this->data_start;
+
+ this->input->seek(this->input, data_offset, SEEK_SET);
+ }
+
+ this->seek_flag = 1;
+ status = this->status = DEMUX_OK;
+ pthread_mutex_unlock(&this->mutex);
+
+ return status;
+}
+
+static void demux_wav_stop (demux_plugin_t *this_gen) {
+
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+ void *p;
+
+ pthread_mutex_lock( &this->mutex );
+
+ if (!this->thread_running) {
+ pthread_mutex_unlock( &this->mutex );
+ return;
+ }
+
+ /* seek back to the beginning of the data in preparation for another
+ * start */
+ this->input->seek(this->input, this->data_start, SEEK_SET);
+
+ this->send_end_buffers = 0;
+ this->status = DEMUX_FINISHED;
+
+ pthread_mutex_unlock( &this->mutex );
+ pthread_join (this->thread, &p);
+
+ xine_demux_flush_engine(this->xine);
+
+ xine_demux_control_end(this->xine, BUF_FLAG_END_USER);
+}
+
+static void demux_wav_close (demux_plugin_t *this_gen) {
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+
+ pthread_mutex_destroy (&this->mutex);
+ free(this);
+}
+
+static int demux_wav_get_status (demux_plugin_t *this_gen) {
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+
+ return this->status;
+}
+
+static char *demux_wav_get_id(void) {
+ return "WAV";
+}
+
+static char *demux_wav_get_mimetypes(void) {
+ return NULL;
+}
+
+/* return the approximate length in seconds */
+static int demux_wav_get_stream_length (demux_plugin_t *this_gen) {
+
+ demux_wav_t *this = (demux_wav_t *) this_gen;
+
+ return (int)(this->data_size / this->wave.nAvgBytesPerSec);
+}
+
+demux_plugin_t *init_demuxer_plugin(int iface, xine_t *xine) {
+
+ demux_wav_t *this;
+
+ if (iface != 10) {
+ printf (_("demux_wav: plugin doesn't support plugin API version %d.\n"
+ " this means there's a version mismatch between xine and this "
+ " demuxer plugin.\nInstalling current demux plugins should help.\n"),
+ iface);
+ return NULL;
+ }
+
+ this = xine_xmalloc (sizeof (demux_wav_t));
+ this->config = xine->config;
+ this->xine = xine;
+
+ (void*) this->config->register_string(this->config,
+ "mrl.ends_wav", VALID_ENDS,
+ _("valid mrls ending for wav demuxer"),
+ NULL, NULL, NULL);
+
+ this->demux_plugin.interface_version = DEMUXER_PLUGIN_IFACE_VERSION;
+ this->demux_plugin.open = demux_wav_open;
+ this->demux_plugin.start = demux_wav_start;
+ this->demux_plugin.seek = demux_wav_seek;
+ this->demux_plugin.stop = demux_wav_stop;
+ this->demux_plugin.close = demux_wav_close;
+ this->demux_plugin.get_status = demux_wav_get_status;
+ this->demux_plugin.get_identifier = demux_wav_get_id;
+ this->demux_plugin.get_stream_length = demux_wav_get_stream_length;
+ this->demux_plugin.get_mimetypes = demux_wav_get_mimetypes;
+
+ this->status = DEMUX_FINISHED;
+ pthread_mutex_init( &this->mutex, NULL );
+
+ return (demux_plugin_t *) this;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-12 05:43:35 +0000