paraslash 0.3.1
[paraslash.git] / aac_afh.c
index c268255..11dde57 100644 (file)
--- a/aac_afh.c
+++ b/aac_afh.c
@@ -1,19 +1,7 @@
 /*
- * Copyright (C) 2006-2007 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2006-2008 Andre Noll <maan@systemlinux.org>
  *
- *     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 program 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, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
  */
 /*
  * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
 
 /** \file aac_afh.c para_server's aac audio format handler */
 
-#include "server.cmdline.h"
-#include "server.h"
-#include "vss.h"
+#include "para.h"
 #include "error.h"
 #include "string.h"
+#include "afh.h"
+#include "afs.h"
+#include "server.h"
 #include "aac.h"
-#include "fd.h"
-
-/** size of the input buffer, must be big enough to hold header */
-#define AAC_INBUF_SIZE 65536
 
-static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
+static int aac_find_stsz(unsigned char *buf, size_t buflen, off_t *skip)
 {
        int i;
 
@@ -43,138 +28,125 @@ static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
 
                if (p[0] != 's' || p[1] != 't' || p[2] != 's' || p[3] != 'z')
                        continue;
-               PARA_INFO_LOG("found stsz@%d\n", i);
+               PARA_DEBUG_LOG("found stsz@%d\n", i);
                i += 8;
                sample_size = aac_read_int32(buf + i);
-               PARA_INFO_LOG("sample size: %d\n", sample_size);
+               PARA_DEBUG_LOG("sample size: %d\n", sample_size);
                i += 4;
                sample_count = aac_read_int32(buf + i);
                i += 4;
-               PARA_INFO_LOG("sample count: %d\n", sample_count);
+               PARA_DEBUG_LOG("sample count: %d\n", sample_count);
                *skip = i;
                return sample_count;
        }
-       PARA_WARNING_LOG("stsz not found, buflen: %d\n", buflen);
        return -E_STSZ;
 }
 
-static int read_chunk_table(FILE *file, struct audio_format_info *afi,
-               unsigned char *inbuf, size_t inbuf_len, size_t skip)
+static ssize_t aac_compute_chunk_table(struct afh_info *afhi,
+               unsigned char *map, size_t numbytes)
 {
        int ret, i;
        size_t sum = 0;
+       off_t skip;
 
-       for (;;) {
-               ret = aac_find_stsz(inbuf, inbuf_len, &skip);
-               if (ret >= 0)
+       ret = aac_find_stsz(map, numbytes, &skip);
+       if (ret < 0)
+               return ret;
+       afhi->chunks_total = ret;
+       PARA_DEBUG_LOG("sz table has %lu entries\n", afhi->chunks_total);
+       afhi->chunk_table = para_malloc((afhi->chunks_total + 1) * sizeof(size_t));
+       for (i = 1; i <= afhi->chunks_total; i++) {
+               if (skip + 4 > numbytes)
                        break;
-               ret = read(fileno(file), inbuf, AAC_INBUF_SIZE);
-               if (ret <= 0)
-                       return -E_AAC_READ;
-               inbuf_len = ret;
-               PARA_INFO_LOG("next buffer: %d bytes\n", ret);
-       }
-       afi->chunks_total = ret;
-       PARA_INFO_LOG("sz table has %lu entries\n", afi->chunks_total);
-       afi->chunk_table = para_malloc((afi->chunks_total + 1) * sizeof(size_t));
-       for (i = 1; i <= afi->chunks_total; i++) {
-               if (skip + 4 > inbuf_len) {
-                       skip = inbuf_len - skip;
-                       memmove(inbuf, inbuf + inbuf_len - skip, skip);
-                       ret = read(fileno(file), inbuf + skip,
-                               AAC_INBUF_SIZE - skip);
-                       if (ret <= 0)
-                               return -E_AAC_READ;
-                       inbuf_len = ret + skip;
-                       skip = 0;
-                       PARA_INFO_LOG("next buffer: %zu bytes\n", inbuf_len);
-               }
-               sum += aac_read_int32(inbuf + skip);
-               afi->chunk_table[i] = sum;
+               sum += aac_read_int32(map + skip);
+               afhi->chunk_table[i] = sum;
                skip += 4;
-//             if (i < 10 || i + 10 > afi->chunks_total)
-//                     PARA_DEBUG_LOG("offset #%d: %zu\n", i, afi->chunk_table[i]);
+//             if (i < 10 || i + 10 > afhi->chunks_total)
+//                     PARA_DEBUG_LOG("offset #%d: %zu\n", i, afhi->chunk_table[i]);
        }
-       return 1;
+       return skip;
 }
 
-static long unsigned aac_set_chunk_tv(struct audio_format_info *afi,
-               mp4AudioSpecificConfig *mp4ASC)
+static int aac_set_chunk_tv(struct afh_info *afhi,
+               mp4AudioSpecificConfig *mp4ASC, long unsigned *seconds)
 {
-       float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023,
-               ms = 1000.0 * afi->chunks_total * tmp / mp4ASC->samplingFrequency;
+       float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023;
        struct timeval total;
+       long unsigned ms = 1000.0 * afhi->chunks_total * tmp
+               / mp4ASC->samplingFrequency;
 
+       if (!mp4ASC->samplingFrequency)
+               return -E_MP4ASC;
+       ms = 1000.0 * afhi->chunks_total * tmp / mp4ASC->samplingFrequency;
        ms2tv(ms, &total);
-       tv_divide(afi->chunks_total, &total, &afi->chunk_tv);
-       PARA_INFO_LOG("%luHz, %fs (%lu x %lums)\n",
+       tv_divide(afhi->chunks_total, &total, &afhi->chunk_tv);
+       PARA_INFO_LOG("%luHz, %lus (%lu x %lums)\n",
                mp4ASC->samplingFrequency, ms / 1000,
-               afi->chunks_total, tv2ms(&afi->chunk_tv));
-       return ms / 1000;
+               afhi->chunks_total, tv2ms(&afhi->chunk_tv));
+       if (ms < 1000)
+               return -E_MP4ASC;
+       *seconds = ms / 1000;
+       return 1;
 }
 
 /*
  * Init m4a file and write some tech data to given pointers.
  */
-static int aac_get_file_info(FILE *file, struct audio_format_info *afi)
+static int aac_get_file_info(char *map, size_t numbytes,
+               struct afh_info *afhi)
 {
-       int i, ret, decoder_len;
-       size_t inbuf_len, skip;
-       unsigned long rate = 0;
-       unsigned char channels = 0, *inbuf = para_malloc(AAC_INBUF_SIZE);
+       int i;
+       size_t skip;
+       ssize_t ret;
+       unsigned long rate = 0, decoder_len;
+       unsigned char channels = 0;
        mp4AudioSpecificConfig mp4ASC;
-       NeAACDecHandle handle;
+       NeAACDecHandle handle = NULL;
+       unsigned char *umap = (unsigned char *) map;
 
-       ret = read(fileno(file), inbuf, AAC_INBUF_SIZE);
-       if (ret <= 0) {
-               ret = -E_AAC_READ;
-               goto out;
-       }
-       inbuf_len = ret;
-       ret = aac_find_esds(inbuf, inbuf_len, &skip);
+       ret = aac_find_esds(umap, numbytes, &skip, &decoder_len);
        if (ret < 0)
                goto out;
-       decoder_len = ret;
        handle = aac_open();
-       ret = NeAACDecInit(handle, inbuf + skip, decoder_len, &rate, &channels);
-       if (ret < 0) {
-               ret = -E_AACDEC_INIT;
+       ret = -E_AAC_AFH_INIT;
+       if (NeAACDecInit(handle, umap + skip, decoder_len, &rate, &channels))
                goto out;
-       }
-       skip += ret;
-       PARA_INFO_LOG("rate: %lu, channels: %d\n", rate, channels);
+       if (!channels)
+               goto out;
+       PARA_DEBUG_LOG("rate: %lu, channels: %d\n", rate, channels);
        ret = -E_MP4ASC;
-       if (NeAACDecAudioSpecificConfig(inbuf + skip, inbuf_len - skip,
-                       &mp4ASC) < 0)
+       if (NeAACDecAudioSpecificConfig(umap + skip, numbytes - skip, &mp4ASC))
                goto out;
-       ret = read_chunk_table(file, afi, inbuf, inbuf_len, skip);
+       if (!mp4ASC.samplingFrequency)
+               goto out;
+       ret = aac_compute_chunk_table(afhi, umap, numbytes);
        if (ret < 0)
                goto out;
-       afi->seconds_total = aac_set_chunk_tv(afi, &mp4ASC);
-       for (;;) {
-               ret = aac_find_entry_point(inbuf, inbuf_len, &skip);
-               if (ret >= 0)
-                       break;
-               ret = read(fileno(file), inbuf, AAC_INBUF_SIZE);
-               if (ret <= 0) {
-                       ret = -E_AAC_READ;
-                       goto out;
-               }
-               inbuf_len = ret;
-               PARA_INFO_LOG("next buffer: %d bytes\n", ret);
-       }
-       afi->chunk_table[0] = ret;
-       for (i = 1; i<= afi->chunks_total; i++)
-               afi->chunk_table[i] += ret;
-       sprintf(afi->info_string, "audio_file_info1:%lu x %lums\n"
-               "audio_file_info2:\n"
-               "audio_file_info3:\n",
-               afi->chunks_total,
-               tv2ms(&afi->chunk_tv));
-       tv_scale(20, &afi->chunk_tv, &afi->eof_tv);
+       skip = ret;
+       ret = aac_set_chunk_tv(afhi, &mp4ASC, &afhi->seconds_total);
+       if (ret < 0)
+               goto out;
+       ret = aac_find_entry_point(umap + skip, numbytes - skip, &skip);
+       if (ret < 0)
+               goto out;
+       afhi->chunk_table[0] = ret;
+       for (i = 1; i<= afhi->chunks_total; i++)
+               afhi->chunk_table[i] += ret;
+       afhi->channels = channels;
+       afhi->frequency = rate;
+       ret = (afhi->chunk_table[afhi->chunks_total] - afhi->chunk_table[0]) * 8; /* bits */
+       ret += (channels * afhi->seconds_total * 500); /* avoid rounding error */
+       afhi->bitrate = ret / (channels * afhi->seconds_total * 1000);
+       sprintf(afhi->info_string, "%s:\n%s:\n%s:\n",
+               status_item_list[SI_AUDIO_FILE_INFO],
+               status_item_list[SI_TAGINFO1],
+               status_item_list[SI_TAGINFO2]
+       );
+       tv_scale(20, &afhi->chunk_tv, &afhi->eof_tv);
        ret = 1;
 out:
-       free(inbuf);
+       if (handle)
+               NeAACDecClose(handle);
        return ret;
 }