Add codecs to librbcodec.

Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>

lib/rbcodec/codecs/vorbis.c

@@ -0,0 +1,263 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Björn Stenberg
+ *
+ * This program 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.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include "codeclib.h"
+#include "libtremor/ivorbisfile.h"
+#include "libtremor/ogg.h"
+#ifdef SIMULATOR
+#include <tlsf.h>
+#endif
+
+CODEC_HEADER
+
+#if defined(CPU_ARM) || defined(CPU_COLDFIRE) || defined(CPU_MIPS)
+#include <setjmp.h>
+jmp_buf rb_jump_buf;
+#endif
+
+/* Some standard functions and variables needed by Tremor */
+
+static size_t read_handler(void *ptr, size_t size, size_t nmemb, void *datasource)
+{
+    (void)datasource;
+    return ci->read_filebuf(ptr, nmemb*size);
+}
+
+static int initial_seek_handler(void *datasource, ogg_int64_t offset, int whence)
+{
+    (void)datasource;
+    (void)offset;
+    (void)whence;
+    return -1;
+}
+
+static int seek_handler(void *datasource, ogg_int64_t offset, int whence)
+{
+    (void)datasource;
+
+    if (whence == SEEK_CUR) {
+        offset += ci->curpos;
+    } else if (whence == SEEK_END) {
+        offset += ci->filesize;
+    }
+
+    if (ci->seek_buffer(offset)) {
+        return 0;
+    }
+
+    return -1;
+}
+
+static int close_handler(void *datasource)
+{
+    (void)datasource;
+    return 0;
+}
+
+static long tell_handler(void *datasource)
+{
+    (void)datasource;
+    return ci->curpos;
+}
+
+/* This sets the DSP parameters based on the current logical bitstream
+ * (sampling rate, number of channels, etc).
+ */
+static bool vorbis_set_codec_parameters(OggVorbis_File *vf)
+{
+    vorbis_info *vi;
+
+    vi = ov_info(vf, -1);
+
+    if (vi == NULL) {
+        return false;
+    }
+
+    ci->configure(DSP_SWITCH_FREQUENCY, ci->id3->frequency);
+    codec_set_replaygain(ci->id3);
+
+    if (vi->channels == 2) {
+          ci->configure(DSP_SET_STEREO_MODE, STEREO_NONINTERLEAVED);
+    } else if (vi->channels == 1) {
+          ci->configure(DSP_SET_STEREO_MODE, STEREO_MONO);
+    }
+
+    return true;
+}
+
+/* this is the codec entry point */
+enum codec_status codec_main(enum codec_entry_call_reason reason)
+{
+    if (reason == CODEC_LOAD) {
+        if (codec_init())
+            return CODEC_ERROR;
+        ci->configure(DSP_SET_SAMPLE_DEPTH, 24);
+    }
+
+    return CODEC_OK;
+}
+
+/* this is called for each file to process */
+enum codec_status codec_run(void)
+{
+    ov_callbacks callbacks;
+    OggVorbis_File vf;
+    ogg_int32_t **pcm;
+
+    int error = CODEC_ERROR;
+    long n;
+    int current_section;
+    int previous_section;
+    int eof;
+    ogg_int64_t vf_offsets[2];
+    ogg_int64_t vf_dataoffsets;
+    ogg_uint32_t vf_serialnos;
+    ogg_int64_t vf_pcmlengths[2];
+    intptr_t param;
+
+#if defined(CPU_ARM) || defined(CPU_COLDFIRE) || defined(CPU_MIPS)
+    if (setjmp(rb_jump_buf) != 0) {
+        /* malloc failed; finish with this track */
+        goto done;
+    }
+#endif
+    ogg_malloc_init();
+
+    /* Create a decoder instance */
+    callbacks.read_func = read_handler;
+    callbacks.seek_func = initial_seek_handler;
+    callbacks.tell_func = tell_handler;
+    callbacks.close_func = close_handler;
+
+    ci->seek_buffer(0);
+
+    /* Open a non-seekable stream */
+    error = ov_open_callbacks(ci, &vf, NULL, 0, callbacks);
+    
+    /* If the non-seekable open was successful, we need to supply the missing
+     * data to make it seekable.  This is a hack, but it's reasonable since we
+     * don't want to run the whole file through the buffer before we start
+     * playing.  Using Tremor's seekable open routine would cause us to do
+     * this, so we pretend not to be seekable at first.  Then we fill in the
+     * missing fields of vf with 1) information in ci->id3, and 2) info
+     * obtained by Tremor in the above ov_open call.
+     *
+     * Note that this assumes there is only ONE logical Vorbis bitstream in our
+     * physical Ogg bitstream.  This is verified in metadata.c, well before we
+     * get here.
+     */
+    if (!error) {
+         ogg_free(vf.offsets);
+         ogg_free(vf.dataoffsets);
+         ogg_free(vf.serialnos);
+
+         vf.offsets = vf_offsets;
+         vf.dataoffsets = &vf_dataoffsets;
+         vf.serialnos = &vf_serialnos;
+         vf.pcmlengths = vf_pcmlengths;
+
+         vf.offsets[0] = 0;
+         vf.offsets[1] = ci->id3->filesize;
+         vf.dataoffsets[0] = vf.offset;
+         vf.pcmlengths[0] = 0;
+         vf.pcmlengths[1] = ci->id3->samples;
+         vf.serialnos[0] = vf.current_serialno;
+         vf.callbacks.seek_func = seek_handler;
+         vf.seekable = 1;
+         vf.end = ci->id3->filesize;
+         vf.ready_state = OPENED;
+         vf.links = 1;
+    } else {
+         DEBUGF("Vorbis: ov_open failed: %d\n", error);
+         goto done;
+    }
+
+    if (ci->id3->offset) {
+        ci->seek_buffer(ci->id3->offset);
+        ov_raw_seek(&vf, ci->id3->offset);
+        ci->set_elapsed(ov_time_tell(&vf));
+        ci->set_offset(ov_raw_tell(&vf));
+    }
+    else {
+        ci->set_elapsed(0);
+    }
+
+    previous_section = -1;
+    eof = 0;
+    while (!eof) {
+        enum codec_command_action action = ci->get_command(&param);
+
+        if (action == CODEC_ACTION_HALT)
+            break;
+
+        if (action == CODEC_ACTION_SEEK_TIME) {
+            if (ov_time_seek(&vf, param)) {
+                //ci->logf("ov_time_seek failed");
+            }
+
+            ci->set_elapsed(ov_time_tell(&vf));
+            ci->seek_complete();
+        }
+
+        /* Read host-endian signed 24-bit PCM samples */
+        n = ov_read_fixed(&vf, &pcm, 1024, &current_section);
+
+        /* Change DSP and buffer settings for this bitstream */
+        if (current_section != previous_section) {
+            if (!vorbis_set_codec_parameters(&vf)) {
+                goto done;
+            } else {
+                previous_section = current_section;
+            }
+        }
+
+        if (n == 0) {
+            eof = 1;
+        } else if (n < 0) {
+            DEBUGF("Vorbis: Error decoding frame\n");
+        } else {
+            ci->pcmbuf_insert(pcm[0], pcm[1], n);
+            ci->set_offset(ov_raw_tell(&vf));
+            ci->set_elapsed(ov_time_tell(&vf));
+        }
+    }
+
+    error = CODEC_OK;
+done:
+#if 0 /* defined(SIMULATOR) */
+    {
+        size_t bufsize;
+        void* buf = ci->codec_get_buffer(&bufsize);
+
+        DEBUGF("Vorbis: Memory max: %zu\n", get_max_size(buf));
+    }
+#endif
+    ogg_malloc_destroy();
+
+    /* Clean things up for the next track */
+    vf.dataoffsets = NULL;
+    vf.offsets = NULL;
+    vf.serialnos = NULL;
+    vf.pcmlengths = NULL;
+    ov_clear(&vf);
+
+    return error;
+}