--- /dev/null
+/*****************************************************************************\r
+ * libmpeg2.c: mpeg2 video decoder module making use of libmpeg2.\r
+ *****************************************************************************\r
+ * Copyright (C) 1999-2001 VideoLAN\r
+ * $Id: libmpeg2.c,v 1.1 2003/02/25 17:15:32 gbazin Exp $\r
+ *\r
+ * Authors: Gildas Bazin <gbazin@netcourrier.com>\r
+ *\r
+ * This program is free software; you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License as published by\r
+ * the Free Software Foundation; either version 2 of the License, or\r
+ * (at your option) any later version.\r
+ * \r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License\r
+ * along with this program; if not, write to the Free Software\r
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.\r
+ *****************************************************************************/\r
+\r
+/*****************************************************************************\r
+ * Preamble\r
+ *****************************************************************************/\r
+#include <vlc/vlc.h>\r
+#include <vlc/vout.h>\r
+#include <vlc/input.h>\r
+#include <vlc/decoder.h>\r
+\r
+#include <stdlib.h> /* malloc(), free() */\r
+#include <string.h> /* memcpy(), memset() */\r
+\r
+#include <mpeg2dec/mpeg2.h>\r
+\r
+/*****************************************************************************\r
+ * dec_thread_t : libmpeg2 decoder thread descriptor\r
+ *****************************************************************************/\r
+typedef struct dec_thread_t\r
+{\r
+ /*\r
+ * libmpeg2 properties\r
+ */\r
+ mpeg2dec_t *p_mpeg2dec;\r
+ const mpeg2_info_t *p_info;\r
+\r
+ /*\r
+ * Input properties\r
+ */\r
+ decoder_fifo_t *p_fifo; /* stores the PES stream data */\r
+ pes_packet_t *p_pes; /* current PES we are decoding */\r
+ mtime_t i_pts;\r
+\r
+ /*\r
+ * Output properties\r
+ */\r
+ vout_thread_t *p_vout;\r
+\r
+} dec_thread_t;\r
+\r
+/*****************************************************************************\r
+ * Local prototypes\r
+ *****************************************************************************/\r
+static int OpenDecoder ( vlc_object_t * );\r
+static int RunDecoder ( decoder_fifo_t * );\r
+static void CloseDecoder ( dec_thread_t * );\r
+\r
+/*****************************************************************************\r
+ * Module descriptor\r
+ *****************************************************************************/\r
+vlc_module_begin();\r
+ set_description( _("libmpeg2 decoder module") );\r
+ set_capability( "decoder", 40 );\r
+ set_callbacks( OpenDecoder, NULL );\r
+ add_shortcut( "libmpeg2" );\r
+vlc_module_end();\r
+\r
+/*****************************************************************************\r
+ * OpenDecoder: probe the decoder and return score\r
+ *****************************************************************************/\r
+static int OpenDecoder( vlc_object_t *p_this )\r
+{\r
+ decoder_fifo_t *p_fifo = (decoder_fifo_t*) p_this;\r
+\r
+ if( p_fifo->i_fourcc != VLC_FOURCC('m','p','g','v') )\r
+ {\r
+ return VLC_EGENERIC;\r
+ }\r
+\r
+ p_fifo->pf_run = RunDecoder;\r
+ return VLC_SUCCESS;\r
+}\r
+/*****************************************************************************\r
+ * RunDecoder: the libmpeg2 decoder\r
+ *****************************************************************************/\r
+static int RunDecoder( decoder_fifo_t *p_fifo )\r
+{\r
+ dec_thread_t *p_dec;\r
+ data_packet_t *p_data = NULL;\r
+ mpeg2_state_t state;\r
+ picture_t *p_pic;\r
+ int i_aspect, i_chroma;\r
+\r
+ /* Allocate the memory needed to store the thread's structure */\r
+ if( (p_dec = (dec_thread_t *)malloc (sizeof(dec_thread_t)) )\r
+ == NULL)\r
+ {\r
+ msg_Err( p_fifo, "out of memory" );\r
+ goto error;\r
+ }\r
+\r
+ /* Initialize the thread properties */\r
+ memset( p_dec, 0, sizeof(dec_thread_t) );\r
+ p_dec->p_fifo = p_fifo;\r
+ p_dec->p_pes = NULL;\r
+ p_dec->p_vout = NULL;\r
+ p_dec->p_mpeg2dec = NULL;\r
+ p_dec->p_info = NULL;\r
+ p_dec->i_pts = 0;\r
+\r
+ /* Initialize decoder */\r
+ p_dec->p_mpeg2dec = mpeg2_init();\r
+ if( p_dec->p_mpeg2dec == NULL)\r
+ goto error;\r
+\r
+ p_dec->p_info = mpeg2_info( p_dec->p_mpeg2dec );\r
+\r
+ /* libmpeg2 decoder thread's main loop */\r
+ while( (!p_dec->p_fifo->b_die) && (!p_dec->p_fifo->b_error) )\r
+ {\r
+ state = mpeg2_parse( p_dec->p_mpeg2dec );\r
+\r
+ switch( state )\r
+ {\r
+ case STATE_BUFFER:\r
+ /* Feed libmpeg2 a data packet at a time */\r
+ if( p_data == NULL )\r
+ {\r
+ /* Get the next PES */\r
+ if( p_dec->p_pes )\r
+ input_DeletePES( p_dec->p_fifo->p_packets_mgt,\r
+ p_dec->p_pes );\r
+\r
+ input_ExtractPES( p_dec->p_fifo, &p_dec->p_pes );\r
+ if( !p_dec->p_pes )\r
+ {\r
+ p_dec->p_fifo->b_error = 1;\r
+ break;\r
+ }\r
+\r
+ if( p_dec->p_pes->i_pts )\r
+ {\r
+ mpeg2_pts( p_dec->p_mpeg2dec,\r
+ p_dec->p_pes->i_pts * 9 / 100 );\r
+ }\r
+ p_data = p_dec->p_pes->p_first;\r
+ }\r
+\r
+ if( p_data != NULL )\r
+ {\r
+ mpeg2_buffer( p_dec->p_mpeg2dec,\r
+ p_data->p_payload_start,\r
+ p_data->p_payload_end );\r
+\r
+ p_data = p_data->p_next;\r
+ }\r
+ break;\r
+\r
+ case STATE_SEQUENCE:\r
+ /* Initialize video output */\r
+ i_aspect = p_dec->p_info->sequence->width *\r
+ p_dec->p_info->sequence->pixel_width /\r
+ p_dec->p_info->sequence->height * VOUT_ASPECT_FACTOR /\r
+ p_dec->p_info->sequence->pixel_height;\r
+\r
+ i_chroma = VLC_FOURCC('Y','V','1','2');\r
+\r
+ p_dec->p_vout = vout_Request( p_dec->p_fifo, p_dec->p_vout,\r
+ p_dec->p_info->sequence->width,\r
+ p_dec->p_info->sequence->height,\r
+ i_chroma, i_aspect );\r
+ break;\r
+\r
+ case STATE_PICTURE:\r
+ {\r
+ uint8_t * buf[3];\r
+\r
+ /* Get a new picture */\r
+ while( !(p_pic = vout_CreatePicture( p_dec->p_vout, 0, 0, 0 ) ) )\r
+ {\r
+ if( p_dec->p_fifo->b_die || p_dec->p_fifo->b_error )\r
+ break;\r
+\r
+ msleep( VOUT_OUTMEM_SLEEP );\r
+ }\r
+ if( p_pic == NULL )\r
+ break;\r
+\r
+ buf[0] = p_pic->p[0].p_pixels;\r
+ buf[1] = p_pic->p[1].p_pixels;\r
+ buf[2] = p_pic->p[2].p_pixels;\r
+ mpeg2_set_buf( p_dec->p_mpeg2dec, buf, p_pic );\r
+ }\r
+ break;\r
+\r
+ case STATE_END:\r
+ msg_Err( p_dec->p_fifo, "STATE_END" );\r
+ case STATE_SLICE:\r
+#if 0\r
+ msg_Err( p_dec->p_fifo, "STATE_SLICE: %i",\r
+ p_dec->p_info->display_fbuf ?\r
+ p_dec->p_info->display_fbuf->id : -1 );\r
+#endif\r
+ if( p_dec->p_info->display_fbuf\r
+ && p_dec->p_info->display_fbuf->id )\r
+ {\r
+ p_pic = (picture_t *)p_dec->p_info->display_fbuf->id;\r
+\r
+ if( p_dec->p_info->display_picture->flags & PIC_FLAG_PTS )\r
+ {\r
+ p_dec->i_pts =\r
+ ((mtime_t)p_dec->p_info->display_picture->pts)\r
+ * 100 / 9;\r
+ }\r
+ else\r
+ {\r
+ p_dec->i_pts += (p_dec->p_info->sequence->frame_period/27);\r
+ }\r
+\r
+ vout_DatePicture( p_dec->p_vout, p_pic, p_dec->i_pts );\r
+\r
+ vout_DisplayPicture( p_dec->p_vout, p_pic );\r
+ }\r
+ break;\r
+\r
+ default:\r
+ break;\r
+ }\r
+ }\r
+\r
+ /* If b_error is set, the libmpeg2 decoder thread enters the error loop */\r
+ if( p_dec->p_fifo->b_error )\r
+ {\r
+ DecoderError( p_dec->p_fifo );\r
+ }\r
+\r
+ /* End of the libmpeg2 decoder thread */\r
+ CloseDecoder( p_dec );\r
+\r
+ return 0;\r
+\r
+ error:\r
+ DecoderError( p_fifo );\r
+ if( p_dec )\r
+ {\r
+ if( p_dec->p_fifo )\r
+ p_dec->p_fifo->b_error = 1;\r
+\r
+ /* End of the libmpeg2 decoder thread */\r
+ CloseDecoder( p_dec );\r
+ }\r
+\r
+ return -1;\r
+}\r
+\r
+/*****************************************************************************\r
+ * CloseDecoder: libmpeg2 decoder destruction\r
+ *****************************************************************************/\r
+static void CloseDecoder( dec_thread_t * p_dec )\r
+{\r
+ if( p_dec )\r
+ {\r
+ if( p_dec->p_pes )\r
+ input_DeletePES( p_dec->p_fifo->p_packets_mgt, p_dec->p_pes );\r
+\r
+ vout_Request( p_dec->p_fifo, p_dec->p_vout, 0, 0, 0, 0 );\r
+\r
+ if( p_dec->p_mpeg2dec ) mpeg2_close( p_dec->p_mpeg2dec );\r
+\r
+ free( p_dec );\r
+ }\r
+}\r