void decode_mpeg2(decode_t *decode) { mpeg2dec_t *decoder = NULL; const mpeg2_info_t *info = NULL; const mpeg2_sequence_t *sequence = NULL; mpeg2_state_t state; size_t size; uint32_t ac = 0; WriteDataFn writer = write_yuv420p; if (decode->format == TC_CODEC_RGB) { tc_log_info(__FILE__, "using libmpeg2convert" " RGB24 conversion"); writer = write_rgb24; } ac = mpeg2_accel(MPEG2_ACCEL_DETECT); show_accel(ac); decoder = mpeg2_init(); if (decoder == NULL) { tc_log_error(__FILE__, "Could not allocate a decoder object."); import_exit(1); } info = mpeg2_info(decoder); size = (size_t)-1; do { state = mpeg2_parse(decoder); sequence = info->sequence; switch (state) { case STATE_BUFFER: size = tc_pread(decode->fd_in, buffer, BUFFER_SIZE); mpeg2_buffer(decoder, buffer, buffer + size); break; case STATE_SEQUENCE: if (decode->format == TC_CODEC_RGB) { mpeg2_convert(decoder, mpeg2convert_rgb24, NULL); } break; case STATE_SLICE: case STATE_END: case STATE_INVALID_END: if (info->display_fbuf) { writer(decode, info, sequence); } break; default: /* can't happen */ break; } } while (size); mpeg2_close(decoder); import_exit(0); }
static gboolean gst_mpeg2dec_open (GstVideoDecoder * decoder) { GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (decoder); mpeg2_accel (MPEG2_ACCEL_DETECT); if ((mpeg2dec->decoder = mpeg2_init ()) == NULL) return FALSE; mpeg2dec->info = mpeg2_info (mpeg2dec->decoder); return TRUE; }
mpeg2dec_t * mpeg2_init (void) { mpeg2dec_t * mpeg2dec; mpeg2_accel (ffdshow_accels); mpeg2dec = (mpeg2dec_t *) mpeg2_malloc (sizeof (mpeg2dec_t), MPEG2_ALLOC_MPEG2DEC); if (mpeg2dec == NULL) return NULL; memset (mpeg2dec->decoder.DCTblock, 0, 64 * sizeof (int16_t)); mpeg2dec->chunk_buffer = (uint8_t *) mpeg2_malloc (BUFFER_SIZE + 4, MPEG2_ALLOC_CHUNK); mpeg2dec->sequence.width = (unsigned)-1; mpeg2_reset (mpeg2dec, 1); return mpeg2dec; }
mpeg2dec_t * mpeg2_init (uint32_t cpuflag) { mpeg2dec_t * mpeg2dec; mpeg2_accel (cpuflag);//MPEG2_ACCEL_X86_MMX MPEG2_ACCEL_X86_MMXEXT MPEG2_ACCEL_DETECT MPEG2_ACCEL_X86_SSE2 mpeg2dec = (mpeg2dec_t *) mpeg2_malloc (sizeof (mpeg2dec_t), MPEG2_ALLOC_MPEG2DEC); if (mpeg2dec == NULL) return NULL; memset (mpeg2dec->decoder.DCTblock, 0, 64 * sizeof (int16_t)); mpeg2dec->chunk_buffer = (uint8_t *) mpeg2_malloc (BUFFER_SIZE + 4, MPEG2_ALLOC_CHUNK); mpeg2dec->sequence.width = (unsigned)-1; mpeg2_reset (mpeg2dec, 1); return mpeg2dec; }
mpeg2dec_t * mpeg2_init (void) { mpeg2dec_t * mpeg2dec; mpeg2_accel (MPEG2_ACCEL_DETECT); mpeg2dec = (mpeg2dec_t *) mpeg2_malloc (sizeof (mpeg2dec_t), MPEG2_ALLOC_MPEG2DEC); if (mpeg2dec == NULL) return NULL; memset (mpeg2dec->decoder.DCTblock, 0, 64 * sizeof (signed short)); memset (mpeg2dec->quantizer_matrix, 0, 4 * 64 * sizeof (unsigned char)); mpeg2dec->chunk_buffer = (unsigned char *) mpeg2_malloc (BUFFER_SIZE + 4, MPEG2_ALLOC_CHUNK); mpeg2dec->sequence.width = (unsigned)-1; mpeg2_reset (mpeg2dec, 1); return mpeg2dec; }
/***************************************************************************** * OpenDecoder: probe the decoder and return score *****************************************************************************/ static int OpenDecoder( vlc_object_t *p_this ) { decoder_t *p_dec = (decoder_t*)p_this; decoder_sys_t *p_sys; uint32_t i_accel = 0; if( p_dec->fmt_in.i_codec != VLC_CODEC_MPGV ) return VLC_EGENERIC; /* Select onl recognized original format (standard mpeg video) */ switch( p_dec->fmt_in.i_original_fourcc ) { case VLC_FOURCC('m','p','g','1'): case VLC_FOURCC('m','p','g','2'): case VLC_FOURCC('m','p','g','v'): case VLC_FOURCC('P','I','M','1'): case VLC_FOURCC('h','d','v','2'): break; default: if( p_dec->fmt_in.i_original_fourcc ) return VLC_EGENERIC; break; } /* Allocate the memory needed to store the decoder's structure */ if( ( p_dec->p_sys = p_sys = calloc( 1, sizeof(*p_sys)) ) == NULL ) return VLC_ENOMEM; /* Initialize the thread properties */ p_sys->p_mpeg2dec = NULL; p_sys->p_synchro = NULL; p_sys->p_info = NULL; p_sys->i_current_pts = 0; p_sys->i_previous_pts = 0; p_sys->i_current_dts = 0; p_sys->i_previous_dts = 0; p_sys->b_garbage_pic = false; p_sys->b_slice_i = false; p_sys->b_second_field = false; p_sys->b_skip = false; p_sys->b_preroll = false; DpbInit( p_dec ); p_sys->i_cc_pts = 0; p_sys->i_cc_dts = 0; p_sys->i_cc_flags = 0; #if MPEG2_RELEASE >= MPEG2_VERSION (0, 5, 0) p_dec->pf_get_cc = GetCc; cc_Init( &p_sys->cc ); #endif p_sys->p_gop_user_data = NULL; p_sys->i_gop_user_data = 0; #if defined( __i386__ ) || defined( __x86_64__ ) if( vlc_CPU() & CPU_CAPABILITY_MMX ) { i_accel |= MPEG2_ACCEL_X86_MMX; } if( vlc_CPU() & CPU_CAPABILITY_3DNOW ) { i_accel |= MPEG2_ACCEL_X86_3DNOW; } if( vlc_CPU() & CPU_CAPABILITY_MMXEXT ) { i_accel |= MPEG2_ACCEL_X86_MMXEXT; } #elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc64__ ) if( vlc_CPU() & CPU_CAPABILITY_ALTIVEC ) { i_accel |= MPEG2_ACCEL_PPC_ALTIVEC; } #else /* If we do not know this CPU, trust libmpeg2's feature detection */ i_accel = MPEG2_ACCEL_DETECT; #endif /* Set CPU acceleration features */ mpeg2_accel( i_accel ); /* Initialize decoder */ p_sys->p_mpeg2dec = mpeg2_init(); if( p_sys->p_mpeg2dec == NULL) { msg_Err( p_dec, "mpeg2_init() failed" ); free( p_sys ); return VLC_EGENERIC; } p_sys->p_info = mpeg2_info( p_sys->p_mpeg2dec ); p_dec->pf_decode_video = DecodeBlock; p_dec->fmt_out.i_cat = VIDEO_ES; p_dec->fmt_out.i_codec = 0; return VLC_SUCCESS; }