1 files changed, 255 insertions, 0 deletions

diff --git a/lib/rbcodec/codecs/libmusepack/streaminfo.c b/lib/rbcodec/codecs/libmusepack/streaminfo.c
new file mode 100644
index 0000000000..6b4d3df0c1
--- /dev/null
+++ b/lib/rbcodec/codecs/libmusepack/streaminfo.c
@@ -0,0 +1,255 @@
+/*
+  Copyright (c) 2005-2009, The Musepack Development Team
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are
+  met:
+
+  * Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+  * Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the following
+  disclaimer in the documentation and/or other materials provided
+  with the distribution.
+
+  * Neither the name of the The Musepack Development Team nor the
+  names of its contributors may be used to endorse or promote
+  products derived from this software without specific prior
+  written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/// \file streaminfo.c
+/// Implementation of streaminfo reading functions.
+
+#include <math.h>
+#include "mpcdec.h"
+#include "streaminfo.h"
+#include <stdio.h>
+#include "internal.h"
+#include "huffman.h"
+#include "mpc_bits_reader.h"
+
+/* rockbox: not used
+static const char na[] = "n.a.";
+static char const * const versionNames[] = {
+    na, "'Unstable/Experimental'", na, na, na, "'quality 0'", "'quality 1'",
+    "'Telephone'", "'Thumb'", "'Radio'", "'Standard'", "'Extreme'", "'Insane'",
+    "'BrainDead'", "'quality 9'", "'quality 10'"
+};
+*/
+static const mpc_int32_t samplefreqs[8] = { 44100, 48000, 37800, 32000 };
+/* rockbox: not used
+static const char *
+mpc_get_version_string(float profile) // profile is 0...15, where 7...13 is used
+{
+    return profile >= sizeof versionNames / sizeof *versionNames ? na : versionNames[(int)profile];
+}
+*/
+/* rockbox: not used
+static void
+mpc_get_encoder_string(mpc_streaminfo* si)
+{
+    int ver = si->encoder_version;
+    if (si->stream_version >= 8)
+        ver = (si->encoder_version >> 24) * 100 + ((si->encoder_version >> 16) & 0xFF);
+    if (ver <= 116) {
+        if (ver == 0) {
+            sprintf(si->encoder, "Buschmann 1.7.0...9, Klemm 0.90...1.05");
+        } else {
+            switch (ver % 10) {
+                case 0:
+                    sprintf(si->encoder, "Release %u.%u", ver / 100,
+                            ver / 10 % 10);
+                    break;
+                case 2: case 4: case 6: case 8:
+                    sprintf(si->encoder, "Beta %u.%02u", ver / 100,
+                            ver % 100);
+                    break;
+                default:
+                    sprintf(si->encoder, "--Alpha-- %u.%02u",
+                            ver / 100, ver % 100);
+                    break;
+            }
+        }
+    } else {
+        int major = si->encoder_version >> 24;
+        int minor = (si->encoder_version >> 16) & 0xFF;
+        int build = (si->encoder_version >> 8) & 0xFF;
+        char * tmp = "--Stable--";
+
+        if (minor & 1)
+            tmp = "--Unstable--";
+
+        sprintf(si->encoder, "%s %u.%u.%u", tmp, major, minor, build);
+    }
+}
+*/
+
+static mpc_status check_streaminfo(mpc_streaminfo * si)
+{
+    if (si->max_band == 0 || si->max_band >= 32
+        || si->channels > 2 || si->channels == 0 || si->sample_freq == 0)
+        return MPC_STATUS_FAIL;
+    return MPC_STATUS_OK;
+}
+
+/// Reads streaminfo from SV7 header.
+mpc_status
+streaminfo_read_header_sv7(mpc_streaminfo* si, mpc_bits_reader * r)
+{
+    mpc_uint32_t frames, last_frame_samples;
+
+    si->bitrate            = 0;
+    frames                 = (mpc_bits_read(r, 16) << 16) | mpc_bits_read(r, 16);
+    mpc_bits_read(r, 1); // intensity stereo : should be 0
+    si->ms                 = mpc_bits_read(r, 1);
+    si->max_band           = mpc_bits_read(r, 6);
+    si->profile            = mpc_bits_read(r, 4);
+/* rockbox: not used    
+    si->profile_name       = mpc_get_version_string(si->profile);
+*/
+    mpc_bits_read(r, 2); // Link ?
+    si->sample_freq        = samplefreqs[mpc_bits_read(r, 2)];
+    mpc_bits_read(r, 16); // Estimatedpeak_title
+    si->gain_title         = (mpc_uint16_t) mpc_bits_read(r, 16);
+    si->peak_title         = (mpc_uint16_t) mpc_bits_read(r, 16);
+    si->gain_album         = (mpc_uint16_t) mpc_bits_read(r, 16);
+    si->peak_album         = (mpc_uint16_t) mpc_bits_read(r, 16);
+    si->is_true_gapless    = mpc_bits_read(r, 1); // true gapless: used?
+    last_frame_samples     = mpc_bits_read(r, 11); // true gapless: valid samples for last frame
+    si->fast_seek          = mpc_bits_read(r, 1); // fast seeking
+    mpc_bits_read(r, 19); // unused
+    si->encoder_version    = mpc_bits_read(r, 8);
+    si->channels           = 2;
+    si->block_pwr          = 0;
+
+/* rockbox: not used
+    // convert gain info
+    if (si->gain_title != 0) {
+        int tmp = (int)((MPC_OLD_GAIN_REF - (mpc_int16_t)si->gain_title / 100.) * 256. + .5);
+        if (tmp >= (1 << 16) || tmp < 0) tmp = 0;
+        si->gain_title = (mpc_int16_t) tmp;
+    }
+
+    if (si->gain_album != 0) {
+        int tmp = (int)((MPC_OLD_GAIN_REF - (mpc_int16_t)si->gain_album / 100.) * 256. + .5);
+        if (tmp >= (1 << 16) || tmp < 0) tmp = 0;
+        si->gain_album = (mpc_int16_t) tmp;
+    }
+    
+    if (si->peak_title != 0)
+        si->peak_title = (mpc_uint16_t) (log10(si->peak_title) * 20 * 256 + .5);
+
+    if (si->peak_album != 0)
+        si->peak_album = (mpc_uint16_t) (log10(si->peak_album) * 20 * 256 + .5);
+        
+    mpc_get_encoder_string(si);
+*/
+
+    if (last_frame_samples == 0) last_frame_samples = MPC_FRAME_LENGTH;
+    else if (last_frame_samples > MPC_FRAME_LENGTH) return MPC_STATUS_FAIL;
+    si->samples = (mpc_int64_t) frames * MPC_FRAME_LENGTH;
+    if (si->is_true_gapless)
+        si->samples -= (MPC_FRAME_LENGTH - last_frame_samples);
+    else
+        si->samples -= MPC_DECODER_SYNTH_DELAY;
+
+    si->average_bitrate = 8LL * (si->tag_offset - si->header_position) 
+                          *  si->sample_freq / si->samples;
+
+    return check_streaminfo(si);
+}
+
+/// Reads replay gain datas
+void  streaminfo_gain(mpc_streaminfo* si, const mpc_bits_reader * r_in)
+{
+    mpc_bits_reader r = *r_in;
+
+    int version = mpc_bits_read(&r, 8); // gain version
+    if (version != 1) // we only know ver 1
+        return;
+    si->gain_title         = (mpc_uint16_t) mpc_bits_read(&r, 16);
+    si->peak_title         = (mpc_uint16_t) mpc_bits_read(&r, 16);
+    si->gain_album         = (mpc_uint16_t) mpc_bits_read(&r, 16);
+    si->peak_album         = (mpc_uint16_t) mpc_bits_read(&r, 16);
+}
+
+/// Reads streaminfo from SV8 header.
+mpc_status
+streaminfo_read_header_sv8(mpc_streaminfo* si, const mpc_bits_reader * r_in,
+                           mpc_size_t block_size)
+{
+    mpc_uint32_t CRC;
+    mpc_bits_reader r = *r_in;
+
+    CRC = (mpc_bits_read(&r, 16) << 16) | mpc_bits_read(&r, 16);
+    if (CRC != mpc_crc32(r.buff + 1 - (r.count >> 3), (int)block_size - 4))
+        return MPC_STATUS_FAIL;
+
+    si->stream_version = mpc_bits_read(&r, 8);
+    if (si->stream_version != 8)
+        return MPC_STATUS_FAIL;
+
+    mpc_bits_get_size(&r, &si->samples);
+    mpc_bits_get_size(&r, &si->beg_silence);
+
+    si->is_true_gapless = 1;
+    si->sample_freq = samplefreqs[mpc_bits_read(&r, 3)];
+    si->max_band = mpc_bits_read(&r, 5) + 1;
+    si->channels = mpc_bits_read(&r, 4) + 1;
+    si->ms = mpc_bits_read(&r, 1);
+    si->block_pwr = mpc_bits_read(&r, 3) * 2;
+
+    si->bitrate = 0;
+
+    if ((si->samples - si->beg_silence) != 0)
+        si->average_bitrate = 8LL * (si->tag_offset - si->header_position) 
+                              *  si->sample_freq / (si->samples - si->beg_silence);
+
+    return check_streaminfo(si);
+}
+
+/// Reads encoder informations
+void  streaminfo_encoder_info(mpc_streaminfo* si, const mpc_bits_reader * r_in)
+{
+    mpc_bits_reader r = *r_in;
+
+    si->profile            = mpc_bits_read(&r, 7); // to be divided by 8
+/* rockbox: not used    
+    si->profile_name       = mpc_get_version_string(si->profile);
+*/
+    si->pns                = mpc_bits_read(&r, 1);
+    si->encoder_version = mpc_bits_read(&r, 8) << 24; // major
+    si->encoder_version |= mpc_bits_read(&r, 8) << 16; // minor
+    si->encoder_version |= mpc_bits_read(&r, 8) << 8; // build
+
+/* rockbox: not used   
+    mpc_get_encoder_string(si);
+*/
+}
+
+/* rockbox: not used
+double
+mpc_streaminfo_get_length(mpc_streaminfo * si)
+{
+    return (double) (si->samples - si->beg_silence) / si->sample_freq;
+}
+
+mpc_int64_t mpc_streaminfo_get_length_samples(mpc_streaminfo *si)
+{
+    return si->samples - si->beg_silence;
+}
+*/