/* * 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 */ /* * Sierra Video and Music Data (.vmd) File Demuxer * by Mike Melanson (melanson@pcisys.net) * For more information on the VMD file format, visit: * http://www.pcisys.net/~melanson/codecs/ * * Note that the only way that this demuxer validates by content is by * checking the first 2 bytes, which are 0x2E 0x03 in a Sierra VMD file. * There is a 1/65536 chance of a false positive using this method. * * $Id: demux_vmd.c,v 1.3 2004/06/13 21:28:54 miguelfreitas Exp $ */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include #include #define LOG_MODULE "demux_vmd" #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" #define VMD_HEADER_SIZE 0x330 #define BYTES_PER_FRAME_RECORD 16 typedef struct { int is_audio_frame; off_t frame_offset; unsigned int frame_size; int64_t pts; int keyframe; unsigned char frame_record[BYTES_PER_FRAME_RECORD]; } vmd_frame_t; 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; off_t data_start; off_t data_size; unsigned char bih[sizeof(xine_bmiheader) + VMD_HEADER_SIZE]; xine_waveformatex wave; unsigned int audio_frames; unsigned int iteration; unsigned int frame_count; vmd_frame_t *frame_table; unsigned int current_frame; int64_t video_pts_inc; int64_t total_pts; } demux_vmd_t ; typedef struct { demux_class_t demux_class; } demux_vmd_class_t; /* returns 1 if the VMD file was opened successfully, 0 otherwise */ static int open_vmd_file(demux_vmd_t *this) { xine_bmiheader *bih = (xine_bmiheader *)this->bih; unsigned char *vmd_header = this->bih + sizeof(xine_bmiheader); off_t toc_offset; unsigned char *raw_frame_table; unsigned int raw_frame_table_size; unsigned char *current_frame_record; off_t current_offset; int i; unsigned int total_frames; int64_t current_video_pts = 0; if (_x_demux_read_header(this->input, vmd_header, VMD_HEADER_SIZE) != VMD_HEADER_SIZE) return 0; if (LE_16(&vmd_header[0]) != VMD_HEADER_SIZE - 2) return 0; /* file is minimally qualified at this point, proceed to load */ /* get the actual filesize */ if ( !(this->data_size = this->input->get_length(this->input)) ) this->data_size = 1; bih->biSize = sizeof(xine_bmiheader) + VMD_HEADER_SIZE; bih->biWidth = LE_16(&vmd_header[12]); bih->biHeight = LE_16(&vmd_header[14]); this->wave.nSamplesPerSec = LE_16(&vmd_header[804]); this->wave.nChannels = (vmd_header[811] & 0x80) ? 2 : 1; this->wave.nBlockAlign = LE_16(&vmd_header[806]); if (this->wave.nBlockAlign & 0x8000) { this->wave.nBlockAlign -= 0x8000; this->wave.wBitsPerSample = 16; } else { this->wave.wBitsPerSample = 8; } /* decide on a framerate */ if (this->wave.nSamplesPerSec) { this->video_pts_inc = 90000; this->video_pts_inc *= this->wave.nBlockAlign; this->video_pts_inc /= this->wave.nSamplesPerSec; } else { this->video_pts_inc = 90000 / 10; } /* skip over the offset table and load the table of contents; don't * care about the offset table since demuxer will calculate those * independently */ toc_offset = LE_32(&vmd_header[812]); this->frame_count = LE_16(&vmd_header[6]); this->input->seek(this->input, toc_offset + this->frame_count * 6, SEEK_SET); /* while we have the toal number of blocks, calculate the total running * time */ this->total_pts = this->frame_count; this->total_pts *= this->video_pts_inc; this->total_pts /= 90; /* 2 frames for every block reported on disk */ this->frame_count *= 2; raw_frame_table_size = this->frame_count * BYTES_PER_FRAME_RECORD; raw_frame_table = xine_xmalloc(raw_frame_table_size); if (this->input->read(this->input, raw_frame_table, raw_frame_table_size) != raw_frame_table_size) { free(raw_frame_table); return 0; } this->frame_table = xine_xmalloc(this->frame_count * sizeof(vmd_frame_t)); current_offset = this->data_start = LE_32(&vmd_header[20]); this->data_size = toc_offset - this->data_start; current_frame_record = raw_frame_table; total_frames = this->frame_count; i = 0; while (total_frames--) { /* if the frame size is 0, do not count the frame and bring the * total frame count down */ this->frame_table[i].frame_size = LE_32(¤t_frame_record[2]); /* this logic is present so that 0-length audio chunks are not * accounted */ if (!this->frame_table[i].frame_size) { this->frame_count--; /* one less frame to count */ current_frame_record += BYTES_PER_FRAME_RECORD; continue; } if (current_frame_record[0] == 0x02) { this->frame_table[i].is_audio_frame = 0; this->frame_table[i].pts = current_video_pts; current_video_pts += this->video_pts_inc; } else { this->frame_table[i].is_audio_frame = 1; this->frame_table[i].pts = 0; } this->frame_table[i].frame_offset = current_offset; current_offset += this->frame_table[i].frame_size; memcpy(this->frame_table[i].frame_record, current_frame_record, BYTES_PER_FRAME_RECORD); current_frame_record += BYTES_PER_FRAME_RECORD; i++; } free(raw_frame_table); this->current_frame = 0; return 1; } static int demux_vmd_send_chunk(demux_plugin_t *this_gen) { demux_vmd_t *this = (demux_vmd_t *) this_gen; buf_element_t *buf = NULL; unsigned int remaining_bytes; vmd_frame_t *frame; if (this->current_frame >= this->frame_count) { this->status = DEMUX_FINISHED; return this->status; } frame = &this->frame_table[this->current_frame]; /* position the stream (will probably be there already) */ this->input->seek(this->input, frame->frame_offset, SEEK_SET); remaining_bytes = frame->frame_size; if (!frame->is_audio_frame) { /* send off the frame record first in its own buffer */ buf = this->video_fifo->buffer_pool_alloc (this->video_fifo); buf->type = BUF_VIDEO_VMD; if( this->data_size ) buf->extra_info->input_normpos = (int)( (double) (frame->frame_offset - this->data_start) * 65535 / this->data_size); memcpy(buf->content, frame->frame_record, BYTES_PER_FRAME_RECORD); buf->size = BYTES_PER_FRAME_RECORD; buf->pts = frame->pts; buf->extra_info->input_time = buf->pts / 90; this->video_fifo->put(this->video_fifo, buf); while (remaining_bytes) { buf = this->video_fifo->buffer_pool_alloc (this->video_fifo); buf->type = BUF_VIDEO_VMD; if( this->data_size ) buf->extra_info->input_normpos = (int)( (double) (frame->frame_offset - this->data_start) * 65535 / this->data_size); 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 = frame->pts; buf->extra_info->input_time = buf->pts / 90; this->video_fifo->put(this->video_fifo, buf); } } else if (frame->is_audio_frame && this->audio_fifo) { #if 0 /* send off the frame record first in its own buffer */ buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo); buf->type = BUF_AUDIO_VMD; if( this->data_size ) buf->extra_info->input_normpos = (int)( (double) (frame->frame_offset - this->data_start) * 65535 / this->data_size); memcpy(buf->content, frame->frame_record, BYTES_PER_FRAME_RECORD); buf->size = BYTES_PER_FRAME_RECORD; buf->pts = 0; /* let the engine sort out the audio pts */ buf->extra_info->input_time = 0; this->audio_fifo->put(this->audio_fifo, buf); while (remaining_bytes) { buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo); buf->type = BUF_AUDIO_VMD; if( this->data_size ) buf->extra_info->input_normpos = (int)( (double) (frame->frame_offset - this->data_start) * 65535 / this->data_size); 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 = 0; /* let the engine sort out the audio pts */ buf->extra_info->input_time = 0; this->audio_fifo->put(this->audio_fifo, buf); } #endif } this->current_frame++; return this->status; } static void demux_vmd_send_headers(demux_plugin_t *this_gen) { demux_vmd_t *this = (demux_vmd_t *) this_gen; buf_element_t *buf; xine_bmiheader *bih = (xine_bmiheader *)this->bih; 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, 1); _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_AUDIO, (this->wave.nSamplesPerSec) ? 1 : 0); _x_stream_info_set(this->stream, XINE_STREAM_INFO_VIDEO_WIDTH, bih->biWidth); _x_stream_info_set(this->stream, XINE_STREAM_INFO_VIDEO_HEIGHT, bih->biHeight); _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_CHANNELS, this->wave.nChannels); _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_SAMPLERATE, this->wave.nSamplesPerSec); _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_BITS, this->wave.wBitsPerSample); /* send start buffers */ _x_demux_control_start(this->stream); /* send init info to decoders */ 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] = this->video_pts_inc; /* initial duration */ memcpy(buf->content, this->bih, sizeof(xine_bmiheader) + VMD_HEADER_SIZE); buf->size = sizeof(xine_bmiheader) + VMD_HEADER_SIZE; buf->type = BUF_VIDEO_VMD; this->video_fifo->put (this->video_fifo, buf); #if 0 if (this->audio_fifo && this->wave.nSamplesPerSec) { buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo); buf->type = BUF_AUDIO_VMD; buf->decoder_flags = BUF_FLAG_HEADER|BUF_FLAG_STDHEADER|BUF_FLAG_FRAME_END; 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; this->wave.nBlockAlign = (this->wave.wBitsPerSample / 8) * this->wave.nChannels; this->wave.nAvgBytesPerSec = this->wave.nBlockAlign * this->wave.nSamplesPerSec; memcpy(buf->content, &this->wave, sizeof(this->wave)); buf->size = sizeof(this->wave); this->audio_fifo->put (this->audio_fifo, buf); } #endif } static int demux_vmd_seek (demux_plugin_t *this_gen, off_t start_pos, int start_time, int playing) { demux_vmd_t *this = (demux_vmd_t *) this_gen; /* if thread is not running, initialize demuxer */ if( !playing ) { this->status = DEMUX_OK; } return this->status; } static void demux_vmd_dispose (demux_plugin_t *this_gen) { demux_vmd_t *this = (demux_vmd_t *) this_gen; free(this); } static int demux_vmd_get_status (demux_plugin_t *this_gen) { demux_vmd_t *this = (demux_vmd_t *) this_gen; return this->status; } static int demux_vmd_get_stream_length (demux_plugin_t *this_gen) { demux_vmd_t *this = (demux_vmd_t *) this_gen; return this->total_pts; } static uint32_t demux_vmd_get_capabilities(demux_plugin_t *this_gen) { return DEMUX_CAP_NOCAP; } static int demux_vmd_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_vmd_t *this; this = xine_xmalloc (sizeof (demux_vmd_t)); this->stream = stream; this->input = input; this->demux_plugin.send_headers = demux_vmd_send_headers; this->demux_plugin.send_chunk = demux_vmd_send_chunk; this->demux_plugin.seek = demux_vmd_seek; this->demux_plugin.dispose = demux_vmd_dispose; this->demux_plugin.get_status = demux_vmd_get_status; this->demux_plugin.get_stream_length = demux_vmd_get_stream_length; this->demux_plugin.get_capabilities = demux_vmd_get_capabilities; this->demux_plugin.get_optional_data = demux_vmd_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_vmd_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 "Sierra VMD file demux plugin"; } static char *get_identifier (demux_class_t *this_gen) { return "VMD"; } static char *get_extensions (demux_class_t *this_gen) { return "vmd"; } static char *get_mimetypes (demux_class_t *this_gen) { return NULL; } static void class_dispose (demux_class_t *this_gen) { demux_vmd_class_t *this = (demux_vmd_class_t *) this_gen; free (this); } void *demux_vmd_init_plugin (xine_t *xine, void *data) { demux_vmd_class_t *this; this = xine_xmalloc (sizeof (demux_vmd_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; }