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Diffstat (limited to 'src/liba52/xine_a52_decoder.c')
-rw-r--r--src/liba52/xine_a52_decoder.c875
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 }
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 19:14:44 +0000