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-rw-r--r--src/demuxers/demux_dts.c398
1 files changed, 398 insertions, 0 deletions
diff --git a/src/demuxers/demux_dts.c b/src/demuxers/demux_dts.c
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index 000000000..70c7e55d0
--- /dev/null
+++ b/src/demuxers/demux_dts.c
@@ -0,0 +1,398 @@
+/*
+ * Copyright (C) 2005 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * Raw DTS Demuxer by James Stembridge (jstembridge@gmail.com)
+ *
+ * $Id: demux_dts.c,v 1.1 2005/05/26 22:09:23 jstembridge Exp $
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#define LOG_MODULE "demux_dts"
+#define LOG_VERBOSE
+/*
+#define LOG
+*/
+
+#include "xine_internal.h"
+#include "xineutils.h"
+#include "demux.h"
+#include "buffer.h"
+#include "bswap.h"
+#include "group_audio.h"
+
+#define DATA_TAG 0x61746164
+
+typedef struct {
+ demux_plugin_t demux_plugin;
+
+ xine_stream_t *stream;
+ fifo_buffer_t *video_fifo;
+ fifo_buffer_t *audio_fifo;
+ input_plugin_t *input;
+ int status;
+
+ int seek_flag;
+ int samples_per_frame;
+ int sample_rate;
+ int frame_size;
+
+ off_t data_start;
+} demux_dts_t;
+
+typedef struct {
+ demux_class_t demux_class;
+} demux_dts_class_t;
+
+static const int dts_sample_rates[] =
+{
+ 0, 8000, 16000, 32000, 0, 0, 11025, 22050, 44100, 0, 0,
+ 12000, 24000, 48000, 96000, 192000
+};
+
+static int open_dts_file(demux_dts_t *this) {
+ int i, offset = 0;
+ uint32_t syncword = 0;
+ uint8_t peak[MAX_PREVIEW_SIZE];
+
+ if (_x_demux_read_header(this->input, peak, MAX_PREVIEW_SIZE) !=
+ MAX_PREVIEW_SIZE)
+ return 0;
+
+ /* Check for wav header, as we'll handle DTS with a wav header shoved
+ * on the front for CD burning */
+ if ((peak[0] == 'R') && (peak[1] == 'I') && (peak[2] == 'F') &&
+ (peak[3] == 'F') && (peak[8] == 'W') && (peak[9] == 'A') &&
+ (peak[10] == 'V') && (peak[11] == 'E') && (peak[12] == 'f') &&
+ (peak[13] == 'm') && (peak[14] == 't') && (peak[15] == ' ')) {
+ /* Check this looks like a cd audio wav */
+ unsigned int audio_type;
+ xine_waveformatex *wave = (xine_waveformatex *) &peak[20];
+
+ _x_waveformatex_le2me(wave);
+ audio_type = _x_formattag_to_buf_audio(wave->wFormatTag);
+
+ if ((audio_type != BUF_AUDIO_LPCM_LE) || (wave->nChannels != 2) ||
+ (wave->nSamplesPerSec != 44100) || (wave->wBitsPerSample != 16))
+ return 0;
+
+ lprintf("looks like a cd audio wav file\n");
+
+ /* Find the data chunk */
+ offset = 20 + LE_32(&peak[16]);
+ while (offset < MAX_PREVIEW_SIZE-8) {
+ unsigned int chunk_tag = LE_32(&peak[offset]);
+ unsigned int chunk_size = LE_32(&peak[offset+4]);
+
+ if (chunk_tag == DATA_TAG) {
+ offset += 8;
+ lprintf("found the start of the data at offset %d\n", offset);
+ break;
+ } else
+ offset += chunk_size;
+ }
+ }
+
+ /* Look for a valid DTS syncword */
+ for (i=offset; i < MAX_PREVIEW_SIZE; i++) {
+ /* 14 bits and little endian bitstream */
+ if ((syncword == 0xff1f00e8) &&
+ ((peak[i] & 0xf0) == 0xf0) && (peak[i+1] == 0x07)) {
+ this->data_start = i-4;
+ lprintf("found DTS syncword at offset %d\n", i-4);
+ break;
+ }
+
+ syncword = (syncword << 8) | peak[i];
+ }
+
+ if (i < MAX_PREVIEW_SIZE-9) {
+ unsigned int nblks, fsize, sfreq;
+
+ /* 14 bits and little endian bitstream */
+ nblks = ((peak[this->data_start+4] & 0x07) << 4) |
+ ((peak[this->data_start+7] & 0x3c) >> 2);
+ fsize = (((peak[this->data_start+7] & 0x03) << 12) |
+ (peak[this->data_start+6] << 4) |
+ ((peak[this->data_start+9] & 0x3c) >> 2)) + 1;
+ sfreq = peak[this->data_start+8] & 0x0f;
+
+ if ((sfreq > sizeof(dts_sample_rates)/sizeof(int)) ||
+ (dts_sample_rates[sfreq] == 0))
+ return 0;
+
+ /* Big assumption - this is CBR data */
+ this->samples_per_frame = (nblks + 1) * 32;
+ this->frame_size = fsize * 8 / 14 * 2;
+ this->sample_rate = dts_sample_rates[sfreq];
+
+ lprintf("samples per frame: %d\n", this->samples_per_frame);
+ lprintf("frame size: %d\n", this->frame_size);
+ lprintf("sample rate: %d\n", this->sample_rate);
+
+ /* Seek to start of DTS data */
+ this->input->seek(this->input, this->data_start, SEEK_SET);
+
+ return 1;
+ }
+
+ return 0;
+}
+
+static int demux_dts_send_chunk (demux_plugin_t *this_gen) {
+ demux_dts_t *this = (demux_dts_t *) this_gen;
+
+ buf_element_t *buf = NULL;
+ off_t current_stream_pos;
+ int64_t audio_pts;
+ int frame_number;
+
+ current_stream_pos = this->input->get_current_pos(this->input) -
+ this->data_start;
+ frame_number = current_stream_pos / this->frame_size;
+
+ audio_pts = frame_number;
+ audio_pts *= 90000;
+ audio_pts *= this->samples_per_frame;
+ audio_pts /= this->sample_rate;
+
+ if (this->seek_flag) {
+ _x_demux_control_newpts(this->stream, audio_pts, BUF_FLAG_SEEK);
+ this->seek_flag = 0;
+ }
+
+ buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+ buf->size = this->input->read(this->input, buf->content, this->frame_size);
+
+ if (buf->size == 0) {
+ buf->free_buffer(buf);
+ this->status = DEMUX_FINISHED;
+ return this->status;
+ }
+
+ buf->type = BUF_AUDIO_DTS;
+ if( this->input->get_length (this->input) )
+ buf->extra_info->input_normpos = (int)( (double) current_stream_pos *
+ 65535 / (this->input->get_length(this->input) - this->data_start) );
+ buf->extra_info->input_time = audio_pts / 90;
+ buf->pts = audio_pts;
+ buf->decoder_flags |= BUF_FLAG_FRAME_END;
+
+ this->audio_fifo->put (this->audio_fifo, buf);
+
+ return this->status;
+}
+
+static void demux_dts_send_headers(demux_plugin_t *this_gen) {
+ demux_dts_t *this = (demux_dts_t *) this_gen;
+ buf_element_t *buf;
+
+ this->video_fifo = this->stream->video_fifo;
+ this->audio_fifo = this->stream->audio_fifo;
+
+ this->status = DEMUX_OK;
+
+ /* load stream information */
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_VIDEO, 0);
+ _x_stream_info_set(this->stream, XINE_STREAM_INFO_HAS_AUDIO, 1);
+
+ /* send start buffers */
+ _x_demux_control_start(this->stream);
+
+ /* send init info to decoders */
+ if (this->audio_fifo) {
+ buf = this->audio_fifo->buffer_pool_alloc (this->audio_fifo);
+ buf->type = BUF_AUDIO_DTS;
+ buf->decoder_flags = BUF_FLAG_HEADER|BUF_FLAG_FRAME_END;
+ buf->size = 0;
+ this->audio_fifo->put (this->audio_fifo, buf);
+ }
+}
+
+static int demux_dts_get_stream_length (demux_plugin_t *this_gen) {
+ demux_dts_t *this = (demux_dts_t *) this_gen;
+ int stream_length = 0;
+
+ if (this->input->get_length(this->input)) {
+ stream_length = this->input->get_length(this->input) - this->data_start;
+ stream_length /= this->frame_size;
+ stream_length *= this->samples_per_frame;
+ stream_length /= this->sample_rate;
+ stream_length *= 1000;
+
+ lprintf("running time: %u\n", stream_length);
+ }
+
+ return stream_length;
+}
+
+static int demux_dts_seek (demux_plugin_t *this_gen,
+ off_t start_pos, int start_time, int playing) {
+
+ demux_dts_t *this = (demux_dts_t *) this_gen;
+
+ this->seek_flag = 1;
+ this->status = DEMUX_OK;
+ _x_demux_flush_engine (this->stream);
+
+ /* if input is non-seekable, do not proceed with the rest of this
+ * seek function */
+ if (!INPUT_IS_SEEKABLE(this->input))
+ return this->status;
+
+ start_pos = (off_t) ( (double) start_pos / 65535 *
+ (this->input->get_length(this->input) - this->data_start) );
+
+ if (start_time) {
+ int length = demux_dts_get_stream_length (this_gen);
+ if (length != 0) {
+ start_pos = start_time *
+ (this->input->get_length(this->input) - this->data_start) / length;
+ }
+ }
+
+ /* divide the requested offset integer-wise by the frame alignment and
+ * multiply by the frame alignment to determine the new starting block */
+ start_pos /= this->frame_size;
+ start_pos *= this->frame_size;
+ start_pos += this->data_start;
+ this->input->seek(this->input, start_pos, SEEK_SET);
+
+ return this->status;
+}
+
+static void demux_dts_dispose (demux_plugin_t *this_gen) {
+ demux_dts_t *this = (demux_dts_t *) this_gen;
+
+ free(this);
+}
+
+static int demux_dts_get_status (demux_plugin_t *this_gen) {
+ demux_dts_t *this = (demux_dts_t *) this_gen;
+
+ return this->status;
+}
+
+static uint32_t demux_dts_get_capabilities(demux_plugin_t *this_gen) {
+ return DEMUX_CAP_NOCAP;
+}
+
+static int demux_dts_get_optional_data(demux_plugin_t *this_gen,
+ void *data, int data_type) {
+ return DEMUX_OPTIONAL_UNSUPPORTED;
+}
+
+static demux_plugin_t *open_plugin (demux_class_t *class_gen, xine_stream_t *stream,
+ input_plugin_t *input) {
+
+ demux_dts_t *this;
+
+ this = xine_xmalloc (sizeof (demux_dts_t));
+ this->stream = stream;
+ this->input = input;
+
+ this->demux_plugin.send_headers = demux_dts_send_headers;
+ this->demux_plugin.send_chunk = demux_dts_send_chunk;
+ this->demux_plugin.seek = demux_dts_seek;
+ this->demux_plugin.dispose = demux_dts_dispose;
+ this->demux_plugin.get_status = demux_dts_get_status;
+ this->demux_plugin.get_stream_length = demux_dts_get_stream_length;
+ this->demux_plugin.get_capabilities = demux_dts_get_capabilities;
+ this->demux_plugin.get_optional_data = demux_dts_get_optional_data;
+ this->demux_plugin.demux_class = class_gen;
+
+ this->status = DEMUX_FINISHED;
+
+ switch (stream->content_detection_method) {
+
+ case METHOD_BY_EXTENSION: {
+ char *extensions, *mrl;
+
+ mrl = input->get_mrl (input);
+ extensions = class_gen->get_extensions (class_gen);
+
+ if (!_x_demux_check_extension (mrl, extensions)) {
+ free (this);
+ return NULL;
+ }
+ }
+ /* falling through is intended */
+
+ case METHOD_BY_CONTENT:
+ case METHOD_EXPLICIT:
+ if (!open_dts_file(this)) {
+ free (this);
+ return NULL;
+ }
+ break;
+
+ default:
+ free (this);
+ return NULL;
+ }
+
+ return &this->demux_plugin;
+}
+
+static char *get_description (demux_class_t *this_gen) {
+ return "Raw DTS file demux plugin";
+}
+
+static char *get_identifier (demux_class_t *this_gen) {
+ return "DTS";
+}
+
+static char *get_extensions (demux_class_t *this_gen) {
+ return "dts";
+}
+
+static char *get_mimetypes (demux_class_t *this_gen) {
+ return NULL;
+}
+
+static void class_dispose (demux_class_t *this_gen) {
+ demux_dts_class_t *this = (demux_dts_class_t *) this_gen;
+
+ free (this);
+}
+
+void *demux_dts_init_plugin (xine_t *xine, void *data) {
+ demux_dts_class_t *this;
+
+ this = xine_xmalloc (sizeof (demux_dts_class_t));
+
+ this->demux_class.open_plugin = open_plugin;
+ this->demux_class.get_description = get_description;
+ this->demux_class.get_identifier = get_identifier;
+ this->demux_class.get_mimetypes = get_mimetypes;
+ this->demux_class.get_extensions = get_extensions;
+ this->demux_class.dispose = class_dispose;
+
+ return this;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-29 14:05:32 +0000