1 files changed, 385 insertions, 0 deletions

diff --git a/src/demuxers/demux_mpc.c b/src/demuxers/demux_mpc.c
new file mode 100644
index 000000000..60d651411
--- /dev/null
+++ b/src/demuxers/demux_mpc.c
@@ -0,0 +1,385 @@
+/*
+ * Copyright (C) 2005 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
+ *
+ * Musepack demuxer by James Stembridge <jstembridge@gmail.com>
+ *
+ * TODO:
+ *   ID3 tag reading
+ *   APE tag reading
+ *   Seeking??
+ *
+ * $Id: 
+ */
+ 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define LOG_MODULE "demux_mpc"
+#define LOG_VERBOSE
+/*
+#define LOG
+*/
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "demux.h"
+#include "buffer.h"
+#include "bswap.h"
+#include "group_audio.h"
+
+/* Note that the header is actually 25 bytes long, so we'd only read 28
+ * (because of byte swapping we have to round up to nearest multiple of 4)
+ * if it weren't for libmusepack reading 32 bytes when it parses the header */
+#define HEADER_SIZE 32
+
+typedef struct {
+  demux_plugin_t       demux_plugin;
+
+  xine_stream_t       *stream;
+  fifo_buffer_t       *audio_fifo;
+  input_plugin_t      *input;
+  int                  status;
+
+  unsigned char        header[HEADER_SIZE];
+  unsigned int         frames;
+  double               samplerate;
+  unsigned int         length;
+  
+  unsigned int         current_frame;
+  unsigned int         next_frame_bits;
+} demux_mpc_t;
+
+typedef struct {
+  demux_class_t     demux_class;
+} demux_mpc_class_t;
+
+
+/* Open a musepack file
+ * This function is called from the _open() function of this demuxer.
+ * It returns 1 if the musepack file was opened successfully. */
+static int open_mpc_file(demux_mpc_t *this) {
+  unsigned char preamble[4];
+  unsigned int first_frame_size;
+  
+  /* Fetch the file signature */
+  if (_x_demux_read_header(this->input, preamble, 4) != 4)
+    return 0;
+
+  /* Validate signature - We only support SV7 at the moment */
+  if ((preamble[0] != 'M') ||
+      (preamble[1] != 'P') ||
+      (preamble[2] != '+') ||
+      (preamble[3] != 0x07))
+    return 0;
+    
+  /* Read header */
+  if (_x_demux_read_header(this->input, this->header, HEADER_SIZE) != HEADER_SIZE)
+    return 0;
+    
+  /* Get frame count */
+  this->current_frame = 0;
+  this->frames = LE_32(&this->header[4]);
+  lprintf("number of frames: %u\n", this->frames);
+  
+  /* Get sample rate */
+  switch ((LE_32(&this->header[8]) >> 16) & 0x3) {
+    case 0:
+      this->samplerate = 44.1;
+      break;
+    case 1:
+      this->samplerate = 48.0;
+      break;
+    case 2:
+      this->samplerate = 37.8;
+      break;
+    case 3:
+      this->samplerate = 32.0;
+      break;
+    default:
+      break;
+  }
+  lprintf("samplerate: %f kHz\n", this->samplerate);
+  
+  /* Calculate stream length */
+  this->length = (int) ((double) this->frames * 1152 / this->samplerate);
+  lprintf("stream length: %d ms\n", this->length);
+
+  /* Calculate the number of bits of the first frame that are still be sent */
+  first_frame_size = (LE_32(&this->header[24]) >> 4) & 0xFFFFF;
+  this->next_frame_bits =  first_frame_size - 4;
+  lprintf("first frame size: %u\n", first_frame_size);
+  
+  /* Move input to start of data (to nearest multiple of 4) */
+  this->input->seek(this->input, 28, SEEK_SET);
+  
+  /* Set stream info */
+  _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_AUDIO, 1);
+  _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_FOURCC, ME_32(preamble));
+  
+  return 1;
+}
+
+static int demux_mpc_send_chunk(demux_plugin_t *this_gen) {
+  demux_mpc_t *this = (demux_mpc_t *) this_gen;
+  unsigned int bits_to_read, bytes_to_read, extra_bits_read, next_frame_size;
+  off_t bytes_read;
+
+  buf_element_t *buf = NULL;
+  
+  /* Check if we've finished */
+  if (this->current_frame++ == this->frames) {
+    lprintf("all frames read\n");
+    this->status = DEMUX_FINISHED;
+    return this->status;    
+  }
+  lprintf("current frame: %u\n", this->current_frame);
+  
+  /* Get a buffer */  
+  buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+  buf->type = BUF_AUDIO_MPC;
+  buf->pts = 0;
+  buf->extra_info->total_time = this->length;
+    
+  /* Set normalised position */
+  buf->extra_info->input_normpos = 
+    (int) ((double) this->input->get_current_pos(this->input) * 65535 / 
+           this->input->get_length(this->input));
+  
+  /* Set time based on there being 1152 audio frames per frame */
+  buf->extra_info->input_time = 
+    (int) ((double) this->current_frame * 1152 / this->samplerate);
+    
+  /* Calculate the number of bits that need to be read to finish reading
+   * the current frame and read the size of the next frame. This number
+   * has to be rounded up to the nearest 4 bytes on account of the
+   * byte swapping used */
+  bits_to_read = (this->next_frame_bits+20+31) & ~31;
+  bytes_to_read = bits_to_read / 8;
+
+  /* Check we'll be able to read directly into the buffer */
+  if (bytes_to_read > buf->max_size) {
+    xprintf(this->stream->xine, XINE_VERBOSITY_LOG,
+            _("demux_mpc: frame too big for buffer"));
+    this->status = DEMUX_FINISHED;
+    return this->status;    
+  }
+  
+  /* Read data */
+  bytes_read = this->input->read(this->input, buf->content, bytes_to_read);
+  if(bytes_read == 0) {
+    buf->free_buffer(buf);
+    this->status = DEMUX_FINISHED;
+    return this->status;
+  } else 
+    buf->size = bytes_read;
+  
+  /* Read the size of the next frame */
+  if (this->current_frame < this->frames) {
+    /* The number of bits of the next frame we've read */ 
+    extra_bits_read = bits_to_read - (this->next_frame_bits+20);
+  
+    if(extra_bits_read <= 12)
+      next_frame_size = (LE_32(&buf->content[bytes_to_read-4]) >> extra_bits_read) & 0xFFFFF;
+    else
+      next_frame_size = ((LE_32(&buf->content[bytes_to_read-8]) << (32-extra_bits_read)) |
+                        (LE_32(&buf->content[bytes_to_read-4]) >> extra_bits_read)) & 0xFFFFF;
+      
+    lprintf("next frame size: %u\n", next_frame_size);
+    
+    /* The number of bits of the next frame still to read */
+    this->next_frame_bits = next_frame_size - extra_bits_read;     
+  }
+  
+  /* Each buffer contains at least one frame */
+  buf->decoder_flags |= BUF_FLAG_FRAME_END;
+
+  this->audio_fifo->put(this->audio_fifo, buf);
+
+  return this->status;
+}
+
+static void demux_mpc_send_headers(demux_plugin_t *this_gen) {
+  demux_mpc_t *this = (demux_mpc_t *) this_gen;
+  buf_element_t *buf;
+
+  this->audio_fifo  = this->stream->audio_fifo;
+
+  this->status = DEMUX_OK;
+
+  /* Send start buffers */
+  _x_demux_control_start(this->stream);
+
+  /* Send header to decoder */
+  if (this->audio_fifo) {
+    buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+    
+    buf->type            = BUF_AUDIO_MPC;
+    buf->decoder_flags   = BUF_FLAG_HEADER|BUF_FLAG_FRAME_END;
+    buf->decoder_info[0] = this->input->get_length(this->input);
+    buf->decoder_info[1] = 0;
+    buf->decoder_info[2] = 0;
+    buf->decoder_info[3] = 0;
+    
+    /* Copy the header */
+    buf->size = HEADER_SIZE;
+    memcpy(buf->content, this->header, buf->size);
+
+    this->audio_fifo->put (this->audio_fifo, buf);
+  }
+}
+
+static int demux_mpc_seek (demux_plugin_t *this_gen,
+                           off_t start_pos, int start_time, int playing) {
+  demux_mpc_t *this = (demux_mpc_t *) this_gen;
+
+  /* If thread is not running, initialize demuxer */
+  if( !playing ) {
+
+    /* send new pts */
+    _x_demux_control_newpts(this->stream, 0, 0);
+
+    this->status = DEMUX_OK;
+  }
+
+  return this->status;
+}
+
+static void demux_mpc_dispose (demux_plugin_t *this_gen) {
+  demux_mpc_t *this = (demux_mpc_t *) this_gen;
+
+  free(this);
+}
+
+static int demux_mpc_get_status (demux_plugin_t *this_gen) {
+  demux_mpc_t *this = (demux_mpc_t *) this_gen;
+
+  return this->status;
+}
+
+static int demux_mpc_get_stream_length (demux_plugin_t *this_gen) {
+//  demux_mpc_t *this = (demux_mpc_t *) this_gen;
+
+  return 0;
+}
+
+static uint32_t demux_mpc_get_capabilities(demux_plugin_t *this_gen) {
+  return DEMUX_CAP_NOCAP;
+}
+
+static int demux_mpc_get_optional_data(demux_plugin_t *this_gen,
+                                       void *data, int data_type) {
+  return DEMUX_OPTIONAL_UNSUPPORTED;
+}
+
+static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *stream,
+                                    input_plugin_t *input) {
+
+  demux_mpc_t    *this;
+
+  this         = xine_xmalloc (sizeof (demux_mpc_t));
+  this->stream = stream;
+  this->input  = input;
+
+  this->demux_plugin.send_headers      = demux_mpc_send_headers;
+  this->demux_plugin.send_chunk        = demux_mpc_send_chunk;
+  this->demux_plugin.seek              = demux_mpc_seek;
+  this->demux_plugin.dispose           = demux_mpc_dispose;
+  this->demux_plugin.get_status        = demux_mpc_get_status;
+  this->demux_plugin.get_stream_length = demux_mpc_get_stream_length;
+  this->demux_plugin.get_capabilities  = demux_mpc_get_capabilities;
+  this->demux_plugin.get_optional_data = demux_mpc_get_optional_data;
+  this->demux_plugin.demux_class       = class_gen;
+
+  this->status = DEMUX_FINISHED;
+  switch (stream->content_detection_method) {
+
+  case METHOD_BY_EXTENSION: {
+    char *extensions, *mrl;
+
+    mrl = input->get_mrl (input);
+    extensions = class_gen->get_extensions (class_gen);
+
+    if (!_x_demux_check_extension (mrl, extensions)) {
+      free (this);
+      return NULL;
+    }
+  }
+  /* Falling through is intended */
+
+  case METHOD_BY_CONTENT:
+  case METHOD_EXPLICIT:
+    
+    if (!open_mpc_file(this)) {
+      free (this);
+      return NULL;
+    }
+  
+  break;
+
+  default:
+    free (this);
+    return NULL;
+  }
+
+  return &this->demux_plugin;
+}
+
+static char *get_description (demux_class_t *this_gen) {
+  return "Musepack demux plugin";
+}
+
+static char *get_identifier (demux_class_t *this_gen) {
+  return "Musepack";
+}
+
+static char *get_extensions (demux_class_t *this_gen) {
+  return "mpc mp+";
+}
+
+static char *get_mimetypes (demux_class_t *this_gen) {
+  return NULL;
+}
+
+static void class_dispose (demux_class_t *this_gen) {
+  demux_mpc_class_t *this = (demux_mpc_class_t *) this_gen;
+
+  free (this);
+}
+
+void *demux_mpc_init_plugin (xine_t *xine, void *data) {
+  demux_mpc_class_t     *this;
+
+  this = xine_xmalloc (sizeof (demux_mpc_class_t));
+
+  this->demux_class.open_plugin     = open_plugin;
+  this->demux_class.get_description = get_description;
+  this->demux_class.get_identifier  = get_identifier;
+  this->demux_class.get_mimetypes   = get_mimetypes;
+  this->demux_class.get_extensions  = get_extensions;
+  this->demux_class.dispose         = class_dispose;
+
+  return this;
+}