/* 2004.02.01 first released source code for IOMP */ /* * Copyright (C) 2000-2001 the xine project * * This file is part of xine, a unix 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 * * $Id: xine_decoder.c,v 1.2 2003/11/25 04:25:52 georgedon Exp $ * * 04-09-2001 DTS passtrough (C) Joachim Koenig * 09-12-2001 DTS passthrough inprovements (C) James Courtier-Dutton * */ #ifndef __sun /* required for swab() */ #define _XOPEN_SOURCE 500 #endif #include #include #include #include #include #include #include /* ntohs */ #include #include "xine_internal.h" #include "xineutils.h" #include "audio_out.h" #include "buffer.h" #include "dts_debug.h" #include "decoder.h" typedef struct { audio_decoder_class_t decoder_class; } dts_class_t; static void dts_reset (audio_decoder_t *this_gen); static void dts_discontinuity (audio_decoder_t *this_gen); static void dts_reset (audio_decoder_t *this_gen) { /* dts_decoder_t *this = (dts_decoder_t *) this_gen; */ } static void dts_discontinuity (audio_decoder_t *this_gen) { } static void dts_decode_data (audio_decoder_t *this_gen, buf_element_t *buf) { dts_decoder_t *this = (dts_decoder_t *) this_gen; uint8_t *data_in = (uint8_t *)buf->content; uint8_t *data_out; audio_buffer_t *audio_buffer; uint32_t ac5_pcm_samples; uint32_t ac5_spdif_type=0; uint32_t ac5_length=0; uint32_t ac5_pcm_length; uint32_t number_of_frames; uint32_t first_access_unit; int n; #ifdef LOG_DEBUG printf("libdts: DTS decode_data called.\n"); #endif #ifdef ENABLE_DTS_PARSE dts_parse_data (this, buf); #endif if ((this->stream->audio_out->get_capabilities(this->stream->audio_out) & AO_CAP_MODE_AC5) == 0) { return; } if (!this->output_open) { this->output_open = (this->stream->audio_out->open (this->stream->audio_out, this->stream, this->bits_per_sample, this->rate, AO_CAP_MODE_AC5)); } if (!this->output_open) return; if (buf->decoder_flags & BUF_FLAG_PREVIEW) return; number_of_frames = buf->decoder_info[1]; /* Number of frames */ first_access_unit = buf->decoder_info[2]; /* First access unit */ if (number_of_frames > 2) { return; } for(n=1;n<=number_of_frames;n++) { data_in += ac5_length; if(data_in >= (buf->content+buf->size)) { printf("libdts: DTS length error\n"); return; } if ((data_in[0] != 0x7f) || (data_in[1] != 0xfe) || (data_in[2] != 0x80) || (data_in[3] != 0x01)) { printf("libdts: DTS Sync bad\n"); return; } audio_buffer = this->stream->audio_out->get_buffer (this->stream->audio_out); audio_buffer->frame_header_count = buf->decoder_info[1]; /* Number of frames */ audio_buffer->first_access_unit = buf->decoder_info[2]; /* First access unit */ #ifdef LOG_DEBUG printf("libdts: DTS frame_header_count = %u\n",audio_buffer->frame_header_count); printf("libdts: DTS first access unit = %u\n",audio_buffer->first_access_unit); #endif if (n == first_access_unit) { audio_buffer->vpts = buf->pts; } else { audio_buffer->vpts = 0; } data_out=(uint8_t *) audio_buffer->mem; ac5_pcm_samples=((data_in[4] & 0x01) << 6) | ((data_in[5] >>2) & 0x3f); ac5_length=((data_in[5] & 0x03) << 12) | (data_in[6] << 4) | ((data_in[7] & 0xf0) >> 4); ac5_length++; if (ac5_length > 8191) { printf("libdts: ac5_length too long\n"); ac5_pcm_length = 0; } else { ac5_pcm_length = (ac5_pcm_samples + 1) * 32; } switch (ac5_pcm_length) { case 512: ac5_spdif_type = 0x0b; /* DTS-1 (512-sample bursts) */ break; case 1024: ac5_spdif_type = 0x0c; /* DTS-1 (1024-sample bursts) */ break; case 2048: ac5_spdif_type = 0x0d; /* DTS-1 (2048-sample bursts) */ break; default: printf("libdts: DTS %i-sample bursts not supported\n", ac5_pcm_length); return; } #ifdef LOG_DEBUG { int i; printf("libdts: DTS frame type=%d\n",data_in[4] >> 7); printf("libdts: DTS deficit frame count=%d\n",(data_in[4] & 0x7f) >> 2); printf("libdts: DTS AC5 PCM samples=%d\n",ac5_pcm_samples); printf("libdts: DTS AC5 length=%d\n",ac5_length); printf("libdts: DTS AC5 bitrate=%d\n",((data_in[8] & 0x03) << 4) | (data_in[8] >> 4)); printf("libdts: DTS AC5 spdif type=%d\n", ac5_spdif_type); printf("libdts: "); for(i=2000;i<2048;i++) { printf("%02x ",data_in[i]); } printf("\n"); } #endif #ifdef LOG_DEBUG printf("libdts: DTS length=%d loop=%d pts=%lld\n",ac5_pcm_length,n,audio_buffer->vpts); #endif audio_buffer->num_frames = ac5_pcm_length; data_out[0] = 0x72; data_out[1] = 0xf8; /* spdif syncword */ data_out[2] = 0x1f; data_out[3] = 0x4e; /* .............. */ data_out[4] = ac5_spdif_type; /* DTS data */ data_out[5] = 0; /* Unknown */ data_out[6] = (ac5_length << 3) & 0xff; /* ac5_length * 8 */ data_out[7] = ((ac5_length ) >> 5) & 0xff; if( ac5_pcm_length ) { if( ac5_pcm_length % 2) { swab(data_in, &data_out[8], ac5_length ); } else { swab(data_in, &data_out[8], ac5_length + 1); } } this->stream->audio_out->put_buffer (this->stream->audio_out, audio_buffer, this->stream); } } static void dts_dispose (audio_decoder_t *this_gen) { dts_decoder_t *this = (dts_decoder_t *) this_gen; if (this->output_open) this->stream->audio_out->close (this->stream->audio_out, this->stream); this->output_open = 0; free (this); } static audio_decoder_t *open_plugin (audio_decoder_class_t *class_gen, xine_stream_t *stream) { dts_decoder_t *this ; #ifdef LOG_DEBUG printf("libdts: DTS open_plugin called.\n"); #endif this = (dts_decoder_t *) malloc (sizeof (dts_decoder_t)); this->audio_decoder.decode_data = dts_decode_data; this->audio_decoder.reset = dts_reset; this->audio_decoder.discontinuity = dts_discontinuity; this->audio_decoder.dispose = dts_dispose; this->stream = stream; this->class = class_gen; this->output_open = 0; this->rate = 48000; this->bits_per_sample=16; this->number_of_channels=2; return &this->audio_decoder; } static char *get_identifier (audio_decoder_class_t *this) { return "DTS"; } static char *get_description (audio_decoder_class_t *this) { return "DTS passthru audio format decoder plugin"; } static void dispose_class (audio_decoder_class_t *this) { #ifdef LOG_DEBUG printf("libdts: DTS class dispose called.\n"); #endif free (this); } static void *init_plugin (xine_t *xine, void *data) { dts_class_t *this ; #ifdef LOG_DEBUG printf("DTS class init_plugin called.\n"); #endif this = (dts_class_t *) malloc (sizeof (dts_class_t)); this->decoder_class.open_plugin = open_plugin; this->decoder_class.get_identifier = get_identifier; this->decoder_class.get_description = get_description; this->decoder_class.dispose = dispose_class; return this; } static uint32_t audio_types[] = { BUF_AUDIO_DTS, 0 }; static decoder_info_t dec_info_audio = { audio_types, /* supported types */ 1 /* priority */ }; plugin_info_t xine_plugin_info[] = { /* type, API, "name", version, special_info, init_function */ { PLUGIN_AUDIO_DECODER, 13, "dts", XINE_VERSION_CODE, &dec_info_audio, init_plugin }, { PLUGIN_NONE, 0, "", 0, NULL, NULL } };