diff options
Diffstat (limited to 'src/liba52/xine_a52_decoder.c')
| -rw-r--r-- | src/liba52/xine_a52_decoder.c | 875 |
1 files changed, 0 insertions, 875 deletions
diff --git a/src/liba52/xine_a52_decoder.c b/src/liba52/xine_a52_decoder.c deleted file mode 100644 index b4b628c81..000000000 --- a/src/liba52/xine_a52_decoder.c +++ /dev/null @@ -1,875 +0,0 @@ -/* - * Copyright (C) 2000-2003 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA - * - * stuff needed to turn liba52 into a xine decoder plugin - */ - -#ifndef __sun -/* required for swab() */ -#define _XOPEN_SOURCE 500 -#endif -/* avoid compiler warnings */ -#define _BSD_SOURCE 1 - -#include "config.h" - -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <fcntl.h> -#include <assert.h> - -#define LOG_MODULE "a52_decoder" -#define LOG_VERBOSE -/* -#define LOG -#define LOG_PTS -*/ - -#include "xine_internal.h" -#include "audio_out.h" - -#ifdef HAVE_A52DEC_A52_H -# include <a52dec/a52.h> -#else -# include "a52.h" -#endif - -#include "buffer.h" -#include "xineutils.h" - -#include "crc.c" - -#undef DEBUG_A52 -#ifdef DEBUG_A52 -int a52file; -#endif - -typedef struct { - audio_decoder_class_t decoder_class; - config_values_t *config; - - float a52_level; - int disable_dynrng_compress; - int enable_surround_downmix; - -} a52dec_class_t; - -typedef struct a52dec_decoder_s { - audio_decoder_t audio_decoder; - - a52dec_class_t *class; - xine_stream_t *stream; - int64_t pts; - int64_t pts_list[5]; - int32_t pts_list_position; - - uint8_t frame_buffer[3840]; - uint8_t *frame_ptr; - int sync_state; - int frame_length, frame_todo; - uint16_t syncword; - - a52_state_t *a52_state; - int a52_flags; - int a52_bit_rate; - int a52_sample_rate; - int have_lfe; - - int a52_flags_map[11]; - int ao_flags_map[11]; - - int audio_caps; - int bypass_mode; - int output_sampling_rate; - int output_open; - int output_mode; - -} a52dec_decoder_t; - -struct frmsize_s -{ - uint16_t bit_rate; - uint16_t frm_size[3]; -}; - -static const struct frmsize_s frmsizecod_tbl[64] = -{ - { 32 ,{64 ,69 ,96 } }, - { 32 ,{64 ,70 ,96 } }, - { 40 ,{80 ,87 ,120 } }, - { 40 ,{80 ,88 ,120 } }, - { 48 ,{96 ,104 ,144 } }, - { 48 ,{96 ,105 ,144 } }, - { 56 ,{112 ,121 ,168 } }, - { 56 ,{112 ,122 ,168 } }, - { 64 ,{128 ,139 ,192 } }, - { 64 ,{128 ,140 ,192 } }, - { 80 ,{160 ,174 ,240 } }, - { 80 ,{160 ,175 ,240 } }, - { 96 ,{192 ,208 ,288 } }, - { 96 ,{192 ,209 ,288 } }, - { 112 ,{224 ,243 ,336 } }, - { 112 ,{224 ,244 ,336 } }, - { 128 ,{256 ,278 ,384 } }, - { 128 ,{256 ,279 ,384 } }, - { 160 ,{320 ,348 ,480 } }, - { 160 ,{320 ,349 ,480 } }, - { 192 ,{384 ,417 ,576 } }, - { 192 ,{384 ,418 ,576 } }, - { 224 ,{448 ,487 ,672 } }, - { 224 ,{448 ,488 ,672 } }, - { 256 ,{512 ,557 ,768 } }, - { 256 ,{512 ,558 ,768 } }, - { 320 ,{640 ,696 ,960 } }, - { 320 ,{640 ,697 ,960 } }, - { 384 ,{768 ,835 ,1152 } }, - { 384 ,{768 ,836 ,1152 } }, - { 448 ,{896 ,975 ,1344 } }, - { 448 ,{896 ,976 ,1344 } }, - { 512 ,{1024 ,1114 ,1536 } }, - { 512 ,{1024 ,1115 ,1536 } }, - { 576 ,{1152 ,1253 ,1728 } }, - { 576 ,{1152 ,1254 ,1728 } }, - { 640 ,{1280 ,1393 ,1920 } }, - { 640 ,{1280 ,1394 ,1920 } } -}; - -/* config callbacks */ -static void a52_level_change_cb(void *this_gen, xine_cfg_entry_t *entry); -static void dynrng_compress_change_cb(void *this_gen, xine_cfg_entry_t *entry); -static void surround_downmix_change_cb(void *this_gen, xine_cfg_entry_t *entry); - - -static void a52dec_reset (audio_decoder_t *this_gen) { - - a52dec_decoder_t *this = (a52dec_decoder_t *) this_gen; - - this->syncword = 0; - this->sync_state = 0; - this->pts = 0; - this->pts_list[0] = 0; - this->pts_list_position = 0; -} - -static void a52dec_discontinuity (audio_decoder_t *this_gen) { - - a52dec_decoder_t *this = (a52dec_decoder_t *) this_gen; - - this->pts = 0; - this->pts_list[0] = 0; - this->pts_list_position = 0; -} - -static inline int16_t blah (int32_t i) { - - if (i > 0x43c07fff) - return 32767; - else if (i < 0x43bf8000) - return -32768; - else - return i - 0x43c00000; -} - -static inline void float_to_int (float * _f, int16_t * s16, int num_channels) { - int i; - int32_t * f = (int32_t *) _f; /* XXX assumes IEEE float format */ - - for (i = 0; i < 256; i++) { - s16[num_channels*i] = blah (f[i]); - } -} - -static inline void mute_channel (int16_t * s16, int num_channels) { - int i; - - for (i = 0; i < 256; i++) { - s16[num_channels*i] = 0; - } -} - -static void a52dec_decode_frame (a52dec_decoder_t *this, int64_t pts, int preview_mode) { - - int output_mode = AO_CAP_MODE_STEREO; - - /* - * do we want to decode this frame in software? - */ -#ifdef LOG_PTS - printf("a52dec:decode_frame:pts=%lld\n",pts); -#endif - if (!this->bypass_mode) { - - int a52_output_flags, i; - sample_t level = this->class->a52_level; - audio_buffer_t *buf; - int16_t *int_samples; - sample_t *samples = a52_samples(this->a52_state); - - /* - * oki, decode this frame in software - */ - - /* determine output mode */ - - a52_output_flags = this->a52_flags_map[this->a52_flags & A52_CHANNEL_MASK]; - - if (a52_frame (this->a52_state, - this->frame_buffer, - &a52_output_flags, - &level, 384)) { - xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "liba52: a52_frame error\n"); - return; - } - - if (this->class->disable_dynrng_compress) - a52_dynrng (this->a52_state, NULL, NULL); - - this->have_lfe = a52_output_flags & A52_LFE; - if (this->have_lfe) - if (this->audio_caps & AO_CAP_MODE_5_1CHANNEL) { - output_mode = AO_CAP_MODE_5_1CHANNEL; - } else if (this->audio_caps & AO_CAP_MODE_4_1CHANNEL) { - output_mode = AO_CAP_MODE_4_1CHANNEL; - } else { - xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG, "liba52: WHAT DO I DO!!!\n"); - output_mode = this->ao_flags_map[a52_output_flags]; - } - else - output_mode = this->ao_flags_map[a52_output_flags]; - /* - * (re-)open output device - */ - - if (!this->output_open - || (this->a52_sample_rate != this->output_sampling_rate) - || (output_mode != this->output_mode)) { - - if (this->output_open) - this->stream->audio_out->close (this->stream->audio_out, this->stream); - - - this->output_open = (this->stream->audio_out->open) (this->stream->audio_out, - this->stream, 16, - this->a52_sample_rate, - output_mode) ; - this->output_sampling_rate = this->a52_sample_rate; - this->output_mode = output_mode; - } - - - if (!this->output_open || preview_mode) - return; - - - /* - * decode a52 and convert/interleave samples - */ - - buf = this->stream->audio_out->get_buffer (this->stream->audio_out); - int_samples = buf->mem; - buf->num_frames = 256*6; - - for (i = 0; i < 6; i++) { - if (a52_block (this->a52_state)) { - xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "liba52: a52_block error on audio channel %d\n", i); -#if 0 - for(n=0;n<2000;n++) { - printf("%02x ",this->frame_buffer[n]); - if ((n % 32) == 0) printf("\n"); - } - printf("\n"); -#endif - buf->num_frames = 0; - break; - } - - switch (output_mode) { - case AO_CAP_MODE_MONO: - float_to_int (&samples[0], int_samples+(i*256), 1); - break; - case AO_CAP_MODE_STEREO: - float_to_int (&samples[0*256], int_samples+(i*256*2), 2); - float_to_int (&samples[1*256], int_samples+(i*256*2)+1, 2); - break; - case AO_CAP_MODE_4CHANNEL: - float_to_int (&samples[0*256], int_samples+(i*256*4), 4); /* L */ - float_to_int (&samples[1*256], int_samples+(i*256*4)+1, 4); /* R */ - float_to_int (&samples[2*256], int_samples+(i*256*4)+2, 4); /* RL */ - float_to_int (&samples[3*256], int_samples+(i*256*4)+3, 4); /* RR */ - break; - case AO_CAP_MODE_4_1CHANNEL: - float_to_int (&samples[0*256], int_samples+(i*256*6)+5, 6); /* LFE */ - float_to_int (&samples[1*256], int_samples+(i*256*6)+0, 6); /* L */ - float_to_int (&samples[2*256], int_samples+(i*256*6)+1, 6); /* R */ - float_to_int (&samples[3*256], int_samples+(i*256*6)+2, 6); /* RL */ - float_to_int (&samples[4*256], int_samples+(i*256*6)+3, 6); /* RR */ - mute_channel ( int_samples+(i*256*6)+4, 6); /* C */ - break; - case AO_CAP_MODE_5CHANNEL: - float_to_int (&samples[0*256], int_samples+(i*256*6)+0, 6); /* L */ - float_to_int (&samples[1*256], int_samples+(i*256*6)+4, 6); /* C */ - float_to_int (&samples[2*256], int_samples+(i*256*6)+1, 6); /* R */ - float_to_int (&samples[3*256], int_samples+(i*256*6)+2, 6); /* RL */ - float_to_int (&samples[4*256], int_samples+(i*256*6)+3, 6); /* RR */ - mute_channel ( int_samples+(i*256*6)+5, 6); /* LFE */ - break; - case AO_CAP_MODE_5_1CHANNEL: - float_to_int (&samples[0*256], int_samples+(i*256*6)+5, 6); /* lfe */ - float_to_int (&samples[1*256], int_samples+(i*256*6)+0, 6); /* L */ - float_to_int (&samples[2*256], int_samples+(i*256*6)+4, 6); /* C */ - float_to_int (&samples[3*256], int_samples+(i*256*6)+1, 6); /* R */ - float_to_int (&samples[4*256], int_samples+(i*256*6)+2, 6); /* RL */ - float_to_int (&samples[5*256], int_samples+(i*256*6)+3, 6); /* RR */ - break; - default: - xprintf (this->stream->xine, XINE_VERBOSITY_DEBUG, "liba52: help - unsupported mode %08x\n", output_mode); - } - } - - lprintf ("%d frames output\n", buf->num_frames); - - /* output decoded samples */ - - buf->vpts = pts; - - this->stream->audio_out->put_buffer (this->stream->audio_out, buf, this->stream); - - } else { - - /* - * loop through a52 data - */ - - if (!this->output_open) { - - int sample_rate, bit_rate, flags; - - a52_syncinfo (this->frame_buffer, &flags, &sample_rate, &bit_rate); - - this->output_open = (this->stream->audio_out->open) (this->stream->audio_out, - this->stream, 16, - sample_rate, - AO_CAP_MODE_A52) ; - this->output_mode = AO_CAP_MODE_A52; - } - - if (this->output_open && !preview_mode) { - /* SPDIF Passthrough - * Build SPDIF Header and encaps the A52 audio data in it. - */ - uint32_t syncword, crc1, fscod,frmsizecod,bsid,bsmod,frame_size; - uint8_t *data_out,*data_in; - audio_buffer_t *buf = this->stream->audio_out->get_buffer (this->stream->audio_out); - data_in=(uint8_t *) this->frame_buffer; - data_out=(uint8_t *) buf->mem; - syncword = data_in[0] | (data_in[1] << 8); - crc1 = data_in[2] | (data_in[3] << 8); - fscod = (data_in[4] >> 6) & 0x3; - frmsizecod = data_in[4] & 0x3f; - bsid = (data_in[5] >> 3) & 0x1f; - bsmod = data_in[5] & 0x7; /* bsmod, stream = 0 */ - frame_size = frmsizecod_tbl[frmsizecod].frm_size[fscod] ; - - data_out[0] = 0x72; data_out[1] = 0xf8; /* spdif syncword */ - data_out[2] = 0x1f; data_out[3] = 0x4e; /* .............. */ - data_out[4] = 0x01; /* AC3 data */ - data_out[5] = bsmod; /* bsmod, stream = 0 */ - data_out[6] = (frame_size << 4) & 0xff; /* frame_size * 16 */ - data_out[7] = ((frame_size ) >> 4) & 0xff; - swab(data_in, &data_out[8], frame_size * 2 ); - - buf->num_frames = 1536; - buf->vpts = pts; - - this->stream->audio_out->put_buffer (this->stream->audio_out, buf, this->stream); - - } - } -} - -static void a52dec_decode_data (audio_decoder_t *this_gen, buf_element_t *buf) { - - a52dec_decoder_t *this = (a52dec_decoder_t *) this_gen; - uint8_t *current = buf->content; - uint8_t *sync_start=current + 1; - uint8_t *end = buf->content + buf->size; - uint8_t byte; - int32_t n; - uint16_t crc16; - uint16_t crc16_result; - - lprintf ("decode data %d bytes of type %08x, pts=%"PRId64"\n", - buf->size, buf->type, buf->pts); - lprintf ("decode data decoder_info=%d, %d\n",buf->decoder_info[1],buf->decoder_info[2]); - - if (buf->decoder_flags & BUF_FLAG_HEADER) - return; - - /* swap byte pairs if this is RealAudio DNET data */ - if (buf->type == BUF_AUDIO_DNET) { - - lprintf ("byte-swapping dnet\n"); - - while (current != end) { - byte = *current++; - *(current - 1) = *current; - *current++ = byte; - } - - /* reset */ - current = buf->content; - end = buf->content + buf->size; - } - - /* A52 packs come from the DVD in blocks of about 2048 bytes. - * Only 1 PTS values can be assigned to each block. - * An A52 frame is about 1700 bytes long. - * So, a single A52 packs can contain 2 A52 frames (or the beginning of an A52 frame at least). - * If we have a PTS value, which A52 frame does it apply to? The A52 pack tells us that. - * So, the info about which A52 frame the PTS applies to is contained in decoder_info sent from the demuxer. - * - * The PTS value from the A52 pack (DVD sector) can only be applied at the start of an A52 frame. - * We call the start of an A52 frame a frame header. - * So, if a A52 pack has 2 "Number of frame headers" is means that the A52 pack contains 2 A52 frame headers. - * The "First access unit" then tells us which A52 frame the PTS value applies to. - * - * Take the following example: - - * PACK1: PTS = 10. Contains the entire A52 frame1, followed by the beginning of the frame2. PTS applies to frame1. - * PACK2: PTS = 1000, Contains the rest of frame2, and the whole of frame3. and the start of frame4. PTS applies to frame4. - * PACK3: PTS = 0 (none), Contains the rest of frame4. - * - * Output should be: - - * frame1, PTS=10 - * frame2, PTS=0 - * frame3, PTS=0 - * frame4, PTS=1000 - * - * So, we have to keep track of PTS values from previous A52 packs here, otherwise they get put on the wrong frame. - */ - - - /* FIXME: the code here does not match the explanation above */ - if (buf->pts) { - int32_t info; - info = buf->decoder_info[1]; - this->pts = buf->pts; - this->pts_list[this->pts_list_position]=buf->pts; - this->pts_list_position++; - if( this->pts_list_position > 3 ) - this->pts_list_position = 3; - if (info == 2) { - this->pts_list[this->pts_list_position]=0; - this->pts_list_position++; - if( this->pts_list_position > 3 ) - this->pts_list_position = 3; - } - } -#if 0 - for(n=0;n < buf->size;n++) { - if ((n % 32) == 0) printf("\n"); - printf("%x ", current[n]); - } - printf("\n"); -#endif - - lprintf ("processing...state %d\n", this->sync_state); - - while (current < end) { - switch (this->sync_state) { - case 0: /* Looking for sync header */ - this->syncword = (this->syncword << 8) | *current++; - if (this->syncword == 0x0b77) { - - this->frame_buffer[0] = 0x0b; - this->frame_buffer[1] = 0x77; - - this->sync_state = 1; - this->frame_ptr = this->frame_buffer+2; - } - break; - - case 1: /* Looking for enough bytes for sync_info. */ - sync_start = current - 1; - *this->frame_ptr++ = *current++; - if ((this->frame_ptr - this->frame_buffer) > 16) { - int a52_flags_old = this->a52_flags; - int a52_sample_rate_old = this->a52_sample_rate; - int a52_bit_rate_old = this->a52_bit_rate; - - this->frame_length = a52_syncinfo (this->frame_buffer, - &this->a52_flags, - &this->a52_sample_rate, - &this->a52_bit_rate); - - if (this->frame_length < 80) { /* Invalid a52 frame_length */ - this->syncword = 0; - current = sync_start; - this->sync_state = 0; - break; - } - - lprintf("Frame length = %d\n",this->frame_length); - - this->frame_todo = this->frame_length - 17; - this->sync_state = 2; - if (!_x_meta_info_get(this->stream, XINE_META_INFO_AUDIOCODEC) || - a52_flags_old != this->a52_flags || - a52_sample_rate_old != this->a52_sample_rate || - a52_bit_rate_old != this->a52_bit_rate) { - - switch (this->a52_flags & A52_CHANNEL_MASK) { - case A52_3F2R: - if (this->a52_flags & A52_LFE) - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 5.1"); - else - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 5.0"); - break; - case A52_3F1R: - case A52_2F2R: - if (this->a52_flags & A52_LFE) - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 4.1"); - else - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 4.0"); - break; - case A52_2F1R: - case A52_3F: - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 3.0"); - break; - case A52_STEREO: - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 2.0 (stereo)"); - break; - case A52_DOLBY: - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 2.0 (dolby)"); - break; - case A52_MONO: - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52 1.0"); - break; - default: - _x_meta_info_set_utf8(this->stream, XINE_META_INFO_AUDIOCODEC, "A/52"); - break; - } - - _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_BITRATE, this->a52_bit_rate); - _x_stream_info_set(this->stream, XINE_STREAM_INFO_AUDIO_SAMPLERATE, this->a52_sample_rate); - } - } - break; - - case 2: /* Filling frame_buffer with sync_info bytes */ - *this->frame_ptr++ = *current++; - this->frame_todo--; - if (this->frame_todo < 1) { - this->sync_state = 3; - } else break; - - case 3: /* Ready for decode */ - crc16 = (uint16_t) ((this->frame_buffer[2] << 8) | this->frame_buffer[3]) ; - crc16_result = crc16_block(&this->frame_buffer[2], this->frame_length - 2) ; /* frame_length */ - if (crc16_result != 0) { /* CRC16 failed */ - xprintf(this->stream->xine, XINE_VERBOSITY_DEBUG, "liba52:a52 frame failed crc16 checksum.\n"); - current = sync_start; - this->pts = 0; - this->syncword = 0; - this->sync_state = 0; - break; - } -#if 0 - a52dec_decode_frame (this, this->pts_list[0], buf->decoder_flags & BUF_FLAG_PREVIEW); -#else - a52dec_decode_frame (this, this->pts, buf->decoder_flags & BUF_FLAG_PREVIEW); -#endif - for(n=0;n<4;n++) { - this->pts_list[n] = this->pts_list[n+1]; - } - this->pts_list_position--; - if( this->pts_list_position < 0 ) - this->pts_list_position = 0; -#if 0 - printf("liba52: pts_list = %lld, %lld, %lld\n", - this->pts_list[0], - this->pts_list[1], - this->pts_list[2]); -#endif - case 4: /* Clear up ready for next frame */ - this->pts = 0; - this->syncword = 0; - this->sync_state = 0; - break; - default: /* No come here */ - break; - } - } - -#ifdef DEBUG_A52 - write (a52file, this->frame_buffer, this->frame_length); -#endif -} - -static void a52dec_dispose (audio_decoder_t *this_gen) { - - a52dec_decoder_t *this = (a52dec_decoder_t *) this_gen; - - if (this->output_open) - this->stream->audio_out->close (this->stream->audio_out, this->stream); - - this->output_open = 0; - - a52_free(this->a52_state); - this->a52_state = NULL; - -#ifdef DEBUG_A52 - close (a52file); -#endif - free (this_gen); -} - -static audio_decoder_t *open_plugin (audio_decoder_class_t *class_gen, xine_stream_t *stream) { - - a52dec_decoder_t *this ; - - lprintf ("open_plugin called\n"); - - this = calloc(1, sizeof (a52dec_decoder_t)); - - this->audio_decoder.decode_data = a52dec_decode_data; - this->audio_decoder.reset = a52dec_reset; - this->audio_decoder.discontinuity = a52dec_discontinuity; - this->audio_decoder.dispose = a52dec_dispose; - this->stream = stream; - this->class = (a52dec_class_t *) class_gen; - - /* int i; */ - - this->audio_caps = stream->audio_out->get_capabilities(stream->audio_out); - this->syncword = 0; - this->sync_state = 0; - this->output_open = 0; - this->pts = 0; - this->pts_list[0] = 0; - this->pts_list_position = 0; - - if( !this->a52_state ) { - this->a52_state = -#ifdef HAVE_A52DEC_A52_H /* External liba52 */ - /* When using external liba52, enable _all_ capabilities, even - if that might break stuff if they add some new capability - that depends on CPU's caps. - At the moment the only capability is DJBFFT, which is tested - only if djbfft is being used at compile time. - - The actual question would be: why don't they check for - capabilities themselves? - */ -#warning "Enabling all external liba52 capabilities." - a52_init (0xFFFFFFFF) -#else - a52_init (xine_mm_accel()) -#endif - ; - } - - /* - * find out if this driver supports a52 output - * or, if not, how many channels we've got - */ - - if (this->audio_caps & AO_CAP_MODE_A52) - this->bypass_mode = 1; - else { - this->bypass_mode = 0; - - this->a52_flags_map[A52_MONO] = A52_MONO; - this->a52_flags_map[A52_STEREO] = ((this->class->enable_surround_downmix ? A52_DOLBY : A52_STEREO)); - this->a52_flags_map[A52_3F] = ((this->class->enable_surround_downmix ? A52_DOLBY : A52_STEREO)); - this->a52_flags_map[A52_2F1R] = ((this->class->enable_surround_downmix ? A52_DOLBY : A52_STEREO)); - this->a52_flags_map[A52_3F1R] = ((this->class->enable_surround_downmix ? A52_DOLBY : A52_STEREO)); - this->a52_flags_map[A52_2F2R] = ((this->class->enable_surround_downmix ? A52_DOLBY : A52_STEREO)); - this->a52_flags_map[A52_3F2R] = ((this->class->enable_surround_downmix ? A52_DOLBY : A52_STEREO)); - this->a52_flags_map[A52_DOLBY] = ((this->class->enable_surround_downmix ? A52_DOLBY : A52_STEREO)); - - this->ao_flags_map[A52_MONO] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_STEREO] = AO_CAP_MODE_STEREO; - this->ao_flags_map[A52_3F] = AO_CAP_MODE_STEREO; - this->ao_flags_map[A52_2F1R] = AO_CAP_MODE_STEREO; - this->ao_flags_map[A52_3F1R] = AO_CAP_MODE_STEREO; - this->ao_flags_map[A52_2F2R] = AO_CAP_MODE_STEREO; - this->ao_flags_map[A52_3F2R] = AO_CAP_MODE_STEREO; - this->ao_flags_map[A52_DOLBY] = AO_CAP_MODE_STEREO; - - /* find best mode */ - if (this->audio_caps & AO_CAP_MODE_5_1CHANNEL) { - - this->a52_flags_map[A52_2F2R] = A52_2F2R; - this->a52_flags_map[A52_3F2R] = A52_3F2R | A52_LFE; - this->ao_flags_map[A52_2F2R] = AO_CAP_MODE_4CHANNEL; - this->ao_flags_map[A52_3F2R] = AO_CAP_MODE_5CHANNEL; - - } else if (this->audio_caps & AO_CAP_MODE_5CHANNEL) { - - this->a52_flags_map[A52_2F2R] = A52_2F2R; - this->a52_flags_map[A52_3F2R] = A52_3F2R; - this->ao_flags_map[A52_2F2R] = AO_CAP_MODE_4CHANNEL; - this->ao_flags_map[A52_3F2R] = AO_CAP_MODE_5CHANNEL; - - } else if (this->audio_caps & AO_CAP_MODE_4_1CHANNEL) { - - this->a52_flags_map[A52_2F2R] = A52_2F2R; - this->a52_flags_map[A52_3F2R] = A52_2F2R | A52_LFE; - this->ao_flags_map[A52_2F2R] = AO_CAP_MODE_4CHANNEL; - this->ao_flags_map[A52_3F2R] = AO_CAP_MODE_4CHANNEL; - - } else if (this->audio_caps & AO_CAP_MODE_4CHANNEL) { - - this->a52_flags_map[A52_2F2R] = A52_2F2R; - this->a52_flags_map[A52_3F2R] = A52_2F2R; - - this->ao_flags_map[A52_2F2R] = AO_CAP_MODE_4CHANNEL; - this->ao_flags_map[A52_3F2R] = AO_CAP_MODE_4CHANNEL; - - /* else if (this->audio_caps & AO_CAP_MODE_STEREO) - defaults are ok */ - } else if (!(this->audio_caps & AO_CAP_MODE_STEREO)) { - xprintf (this->stream->xine, XINE_VERBOSITY_LOG, _("HELP! a mono-only audio driver?!\n")); - - this->a52_flags_map[A52_MONO] = A52_MONO; - this->a52_flags_map[A52_STEREO] = A52_MONO; - this->a52_flags_map[A52_3F] = A52_MONO; - this->a52_flags_map[A52_2F1R] = A52_MONO; - this->a52_flags_map[A52_3F1R] = A52_MONO; - this->a52_flags_map[A52_2F2R] = A52_MONO; - this->a52_flags_map[A52_3F2R] = A52_MONO; - this->a52_flags_map[A52_DOLBY] = A52_MONO; - - this->ao_flags_map[A52_MONO] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_STEREO] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_3F] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_2F1R] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_3F1R] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_2F2R] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_3F2R] = AO_CAP_MODE_MONO; - this->ao_flags_map[A52_DOLBY] = AO_CAP_MODE_MONO; - } - } - - /* - for (i = 0; i<8; i++) - this->a52_flags_map[i] |= A52_ADJUST_LEVEL; - */ -#ifdef DEBUG_A52 - a52file = open ("test.a52", O_CREAT | O_WRONLY | O_TRUNC, 0644); -#endif - return &this->audio_decoder; -} - -static char *get_identifier (audio_decoder_class_t *this) { - lprintf ("get_identifier called\n"); - return "a/52dec"; -} - -static char *get_description (audio_decoder_class_t *this) { - lprintf ("get_description called\n"); - return "liba52 based a52 audio decoder plugin"; -} - -static void dispose_class (audio_decoder_class_t *this) { - lprintf ("dispose_class called\n"); - free (this); -} - -static void *init_plugin (xine_t *xine, void *data) { - - a52dec_class_t *this; - config_values_t *cfg; - - this = calloc(1, sizeof (a52dec_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; - - cfg = this->config = xine->config; - - this->a52_level = (float) cfg->register_range (cfg, "audio.a52.level", 100, - 0, 200, - _("A/52 volume"), - _("With A/52 audio, you can modify the volume " - "at the decoder level. This has the advantage " - "of the audio being already decoded for the " - "specified volume, so later operations like " - "channel downmixing will work on an audio stream " - "of the given volume."), - 10, a52_level_change_cb, this) / 100.0; - this->disable_dynrng_compress = !cfg->register_bool (cfg, "audio.a52.dynamic_range", 0, - _("use A/52 dynamic range compression"), - _("Dynamic range compression limits the dynamic " - "range of the audio. This means making the loud " - "sounds softer, and the soft sounds louder, so you can " - "more easily listen to the audio in a noisy " - "environment without disturbing anyone."), - 0, dynrng_compress_change_cb, this); - this->enable_surround_downmix = cfg->register_bool (cfg, "audio.a52.surround_downmix", 0, - _("downmix audio to 2 channel surround stereo"), - _("When you want to listen to multichannel surround " - "sound, but you have only two speakers or a " - "surround decoder or amplifier which does some " - "sort of matrix surround decoding like prologic, " - "you should enable this option so that the " - "additional channels are mixed into the stereo " - "signal."), - 0, surround_downmix_change_cb, this); - lprintf ("init_plugin called\n"); - return this; -} - -static void a52_level_change_cb(void *this_gen, xine_cfg_entry_t *entry) -{ - ((a52dec_class_t *)this_gen)->a52_level = entry->num_value / 100.0; -} - -static void dynrng_compress_change_cb(void *this_gen, xine_cfg_entry_t *entry) -{ - ((a52dec_class_t *)this_gen)->disable_dynrng_compress = !entry->num_value; -} - -static void surround_downmix_change_cb(void *this_gen, xine_cfg_entry_t *entry) -{ - ((a52dec_class_t *)this_gen)->enable_surround_downmix = entry->num_value; -} - - -static uint32_t audio_types[] = { - BUF_AUDIO_A52, - BUF_AUDIO_DNET, - 0 - }; - -static const decoder_info_t dec_info_audio = { - audio_types, /* supported types */ - 5 /* priority */ -}; - -const plugin_info_t xine_plugin_info[] EXPORTED = { - /* type, API, "name", version, special_info, init_function */ - { PLUGIN_AUDIO_DECODER | PLUGIN_MUST_PRELOAD, 15, "a/52", XINE_VERSION_CODE, &dec_info_audio, init_plugin }, - { PLUGIN_NONE, 0, "", 0, NULL, NULL } -}; |