new Flash Video (FLV) demuxer; somewhat preliminary right now, but it

does demux basic videos

CVS patchset: 6238
CVS date: 2004/03/09 04:14:11

2 files changed, 351 insertions, 1 deletions

diff --git a/src/demuxers/Makefile.am b/src/demuxers/Makefile.am
index 380c70d0e..5987f7bd7 100644
--- a/src/demuxers/Makefile.am
+++ b/src/demuxers/Makefile.am
@@ -46,7 +46,8 @@ lib_LTLIBRARIES = $(ogg_module) $(asf_module) $(mng_module) $(image_module) \
 	xineplug_dmx_slave.la \
 	xineplug_dmx_nsv.la \
 	xineplug_dmx_matroska.la \
-	xineplug_dmx_iff.la
+	xineplug_dmx_iff.la \
+	xineplug_dmx_flv.la 
 
 xineplug_dmx_ogg_la_SOURCES = demux_ogg.c
 xineplug_dmx_ogg_la_LIBADD = $(OGG_LIBS) $(VORBIS_LIBS) $(SPEEX_LIBS) $(THEORA_LIBS) $(XINE_LIB)
@@ -148,5 +149,9 @@ xineplug_dmx_iff_la_SOURCES = demux_iff.c
 xineplug_dmx_iff_la_LIBADD = $(XINE_LIB)
 xineplug_dmx_iff_la_LDFLAGS = -avoid-version -module @XINE_PLUGIN_MIN_SYMS@
 
+xineplug_dmx_flv_la_SOURCES = demux_flv.c
+xineplug_dmx_flv_la_LIBADD = $(XINE_LIB)
+xineplug_dmx_flv_la_LDFLAGS = -avoid-version -module @XINE_PLUGIN_MIN_SYMS@
+
 include_HEADERS = demux.h
 noinst_HEADERS = asfheader.h qtpalette.h group_games.h group_audio.h id3.h ebml.h matroska.h iff.h
diff --git a/src/demuxers/demux_flv.c b/src/demuxers/demux_flv.c
new file mode 100644
index 000000000..8e503648b
--- /dev/null
+++ b/src/demuxers/demux_flv.c
@@ -0,0 +1,345 @@
+/*
+ * Copyright (C) 2004 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
+ */
+
+/*
+ * Flash Video (.flv) File Demuxer
+ *   by Mike Melanson (melanson@pcisys.net)
+ * For more information on the FLV file format, visit:
+ * http://download.macromedia.com/pub/flash/flash_file_format_specification.pdf
+ *
+ * $Id: demux_flv.c,v 1.1 2004/03/09 04:14:11 tmmm Exp $
+ */
+
+#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_flv"
+#define LOG_VERBOSE
+/*
+#define LOG
+*/
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "compat.h"
+#include "demux.h"
+#include "bswap.h"
+#include "group_games.h"
+
+typedef struct {
+  demux_plugin_t       demux_plugin;
+
+  xine_stream_t       *stream;
+  fifo_buffer_t       *video_fifo;
+  fifo_buffer_t       *audio_fifo;
+  input_plugin_t      *input;
+  int                  status;
+
+  unsigned int         video_type;
+  unsigned int         audio_type;
+
+  off_t                data_start;
+  off_t                data_size;
+
+  unsigned char        bih[sizeof(xine_bmiheader)];
+  xine_waveformatex    wave;
+
+} demux_flv_t ;
+
+typedef struct {
+  demux_class_t     demux_class;
+} demux_flv_class_t;
+
+/* returns 1 if the FLV file was opened successfully, 0 otherwise */
+static int open_flv_file(demux_flv_t *this) {
+
+  unsigned char buffer[4];
+  off_t first_offset;
+
+  if (_x_demux_read_header(this->input, buffer, 4) != 4)
+    return 0;
+
+  if ((buffer[0] != 'F') || (buffer[1] != 'L') || (buffer[2] != 'V'))
+    return 0;
+
+  this->video_type = this->audio_type = 0;
+  if (buffer[3] & 0x1)
+    this->video_type = BUF_VIDEO_FLV1;
+/* buffer[3] * 0x4 indicates audio, possibly always MP3; deal with
+   that later */
+
+  /* file is qualified at this point; position to start of first packet */
+  this->input->seek(this->input, 5, SEEK_SET);
+  if (this->input->read(this->input, buffer, 4) != 4)
+    return 0;
+
+  first_offset = BE_32(buffer);
+  this->input->seek(this->input, first_offset, SEEK_SET);
+printf ("  qualified FLV file, repositioned @ offset 0x%llX\n", first_offset);
+
+  return 1;
+}
+
+static int demux_flv_send_chunk(demux_plugin_t *this_gen) {
+
+  demux_flv_t *this = (demux_flv_t *) this_gen;
+  buf_element_t *buf = NULL;
+  unsigned int remaining_bytes;
+  unsigned char chunk_type, sub_type;
+  int64_t pts;
+
+  unsigned char buffer[12];
+
+printf ("  sending FLV chunk...\n");
+  this->input->seek(this->input, 4, SEEK_CUR);
+  if (this->input->read(this->input, buffer, 12) != 12) {
+    this->status = DEMUX_FINISHED;
+    return this->status;
+  }
+
+  chunk_type = buffer[0];
+  remaining_bytes = BE_32(&buffer[0]);
+  remaining_bytes &= 0x00FFFFFF;
+  pts = BE_32(&buffer[3]);
+  pts &= 0x00FFFFFF;
+  sub_type = buffer[11];
+
+  /* Flash timestamps are in milliseconds; multiply by 90 to get xine pts */
+  pts *= 90;
+
+printf ("  chunk_type = %X, 0x%X -1 bytes, pts %lld, sub-type = %X\n",
+  chunk_type, remaining_bytes, pts, sub_type);
+
+  /* only handle the chunk right now if chunk type is 9 and lower nibble
+   * of sub-type is 2 */
+  if ((chunk_type != 9) || ((sub_type & 0x0F) != 2)) {
+    this->input->seek(this->input, remaining_bytes - 1, SEEK_CUR);
+  } else {
+    /* send the chunk off to the video demuxer */
+    remaining_bytes--;  /* sub-type byte does not count */
+    while (remaining_bytes) {
+      buf = this->video_fifo->buffer_pool_alloc (this->video_fifo);
+      buf->type = BUF_VIDEO_FLV1;
+      buf->extra_info->input_pos = this->input->get_current_pos(this->input);
+      buf->extra_info->input_length = this->input->get_length(this->input);
+
+      if (remaining_bytes > buf->max_size)
+        buf->size = buf->max_size;
+      else
+        buf->size = remaining_bytes;
+      remaining_bytes -= buf->size;
+
+      if (!remaining_bytes)
+        buf->decoder_flags |= BUF_FLAG_FRAME_END;
+
+      if (this->input->read(this->input, buf->content, buf->size) !=
+        buf->size) {
+        buf->free_buffer(buf);
+        this->status = DEMUX_FINISHED;
+        break;
+      }
+
+      buf->pts = pts;
+      buf->extra_info->input_time = buf->pts / 90;
+      this->video_fifo->put(this->video_fifo, buf);
+    }
+  }
+
+  return this->status;
+}
+
+static void demux_flv_send_headers(demux_plugin_t *this_gen) {
+  demux_flv_t *this = (demux_flv_t *) this_gen;
+  buf_element_t *buf;
+
+  this->video_fifo  = this->stream->video_fifo;
+  this->audio_fifo  = this->stream->audio_fifo;
+
+  this->status = DEMUX_OK;
+
+  /* load stream information */
+  _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_VIDEO, 
+    (this->video_type ? 1 : 0));
+  _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_AUDIO,
+    (this->audio_type ? 1 : 0));
+
+  /* send start buffers */
+  _x_demux_control_start(this->stream);
+
+  /* send init info to decoders; send the bitmapinfo header to the decoder
+   * primarily as a formality since there is no real data inside */
+  buf = this->video_fifo->buffer_pool_alloc (this->video_fifo);
+  buf->decoder_flags = BUF_FLAG_HEADER|BUF_FLAG_STDHEADER|BUF_FLAG_FRAMERATE|
+                       BUF_FLAG_FRAME_END;
+  buf->decoder_info[0] = 7470;  /* initial duration */
+  memcpy(buf->content, this->bih, sizeof(xine_bmiheader));
+  buf->size = sizeof(xine_bmiheader);
+  buf->type = BUF_VIDEO_FLV1;
+  this->video_fifo->put (this->video_fifo, buf);
+
+}
+
+static int demux_flv_seek (demux_plugin_t *this_gen,
+                           off_t start_pos, int start_time, int playing) {
+
+  demux_flv_t *this = (demux_flv_t *) this_gen;
+
+  /* if thread is not running, initialize demuxer */
+  if( !playing ) {
+    this->status = DEMUX_OK;
+  }
+
+  return this->status;
+}
+
+static void demux_flv_dispose (demux_plugin_t *this_gen) {
+  demux_flv_t *this = (demux_flv_t *) this_gen;
+
+  free(this);
+}
+
+static int demux_flv_get_status (demux_plugin_t *this_gen) {
+  demux_flv_t *this = (demux_flv_t *) this_gen;
+
+  return this->status;
+}
+
+static int demux_flv_get_stream_length (demux_plugin_t *this_gen) {
+/*  demux_flv_t *this = (demux_flv_t *) this_gen;*/
+
+  return 0;
+}
+
+static uint32_t demux_flv_get_capabilities(demux_plugin_t *this_gen) {
+  return DEMUX_CAP_NOCAP;
+}
+
+static int demux_flv_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_flv_t    *this;
+
+  this         = xine_xmalloc (sizeof (demux_flv_t));
+  this->stream = stream;
+  this->input  = input;
+
+  this->demux_plugin.send_headers      = demux_flv_send_headers;
+  this->demux_plugin.send_chunk        = demux_flv_send_chunk;
+  this->demux_plugin.seek              = demux_flv_seek;
+  this->demux_plugin.dispose           = demux_flv_dispose;
+  this->demux_plugin.get_status        = demux_flv_get_status;
+  this->demux_plugin.get_stream_length = demux_flv_get_stream_length;
+  this->demux_plugin.get_capabilities  = demux_flv_get_capabilities;
+  this->demux_plugin.get_optional_data = demux_flv_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_flv_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 "Flash Video file demux plugin";
+}
+
+static char *get_identifier (demux_class_t *this_gen) {
+  return "FLV";
+}
+
+static char *get_extensions (demux_class_t *this_gen) {
+  return "flv";
+}
+
+static char *get_mimetypes (demux_class_t *this_gen) {
+  return NULL;
+}
+
+static void class_dispose (demux_class_t *this_gen) {
+  demux_flv_class_t *this = (demux_flv_class_t *) this_gen;
+
+  free (this);
+}
+
+static void *init_plugin (xine_t *xine, void *data) {
+  demux_flv_class_t     *this;
+
+  this = xine_xmalloc (sizeof (demux_flv_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;
+}
+
+/*
+ * exported plugin catalog entry
+ */
+
+plugin_info_t xine_plugin_info[] = {
+  /* type, API, "name", version, special_info, init_function */
+  { PLUGIN_DEMUX, 24, "flashvideo", XINE_VERSION_CODE, NULL, init_plugin },
+  { PLUGIN_NONE, 0, "", 0, NULL, NULL }
+};