/*
* Copyright (C) 2006-2007 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 "afh.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 DEFAULT_INBUF_SIZE 65536
-
-static FILE *infile;
-static int inbuf_size;
-static unsigned char *inbuf;
-static size_t inbuf_len;
-static struct audio_format_handler *af;
-static size_t num_chunks;
-
-static size_t *chunk_table;
-static NeAACDecHandle handle;
-
-static void aac_close_audio_file(void)
-{
- if (!infile)
- return;
- fclose(infile);
- infile = NULL;
- free(inbuf);
- inbuf = NULL;
- free(chunk_table);
- chunk_table = NULL;
-}
-
-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;
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(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(infile), inbuf, inbuf_size);
- if (ret <= 0)
- return -E_AAC_READ;
- PARA_INFO_LOG("next buffer: %d bytes\n", ret);
- }
- num_chunks = ret;
- PARA_INFO_LOG("sz table has %zu entries\n", num_chunks);
- chunk_table = para_malloc((num_chunks + 1) * sizeof(size_t));
- for (i = 1; i <= num_chunks; i++) {
- if (skip + 4 > inbuf_len) {
- skip = inbuf_len - skip;
- memmove(inbuf, inbuf + inbuf_len - skip, skip);
- ret = read(fileno(infile), inbuf + skip, 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);
- chunk_table[i] = sum;
+ sum += aac_read_int32(map + skip);
+ afhi->chunk_table[i] = sum;
skip += 4;
- if (i < 10 || i + 10 > num_chunks)
- PARA_DEBUG_LOG("offset #%d: %zu\n", i, 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(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 * num_chunks * 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(num_chunks, &total, &af->chunk_tv);
- PARA_INFO_LOG("%luHz, %fs (%zd 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,
- num_chunks, tv2ms(&af->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, char *info_str, long unsigned *frames,
- int *seconds)
+static int aac_get_file_info(char *map, size_t numbytes,
+ struct afh_info *afhi)
{
- int i, ret, decoder_len;
+ int i;
size_t skip;
- unsigned long rate = 0;
+ ssize_t ret;
+ unsigned long rate = 0, decoder_len;
unsigned char channels = 0;
mp4AudioSpecificConfig mp4ASC;
+ NeAACDecHandle handle = NULL;
+ unsigned char *umap = (unsigned char *) map;
- inbuf_size = DEFAULT_INBUF_SIZE;
- inbuf = para_malloc(inbuf_size);
- infile = file;
-
- ret = read(fileno(infile), inbuf, inbuf_size);
- if (ret <= 0)
- return -E_AAC_READ;
- inbuf_len = ret;
- ret = aac_find_esds(inbuf, inbuf_len, &skip);
+ ret = aac_find_esds(umap, numbytes, &skip, &decoder_len);
if (ret < 0)
- return ret;
- decoder_len = ret;
+ goto out;
handle = aac_open();
- ret = NeAACDecInit(handle, inbuf + skip,
- decoder_len, &rate, &channels);
+ ret = -E_AAC_AFH_INIT;
+ if (NeAACDecInit(handle, umap + skip, decoder_len, &rate, &channels))
+ goto out;
+ if (!channels)
+ goto out;
+ PARA_DEBUG_LOG("rate: %lu, channels: %d\n", rate, channels);
+ ret = -E_MP4ASC;
+ if (NeAACDecAudioSpecificConfig(umap + skip, numbytes - skip, &mp4ASC))
+ goto out;
+ if (!mp4ASC.samplingFrequency)
+ goto out;
+ ret = aac_compute_chunk_table(afhi, umap, numbytes);
if (ret < 0)
- return -E_AACDEC_INIT;
- skip += ret;
- PARA_INFO_LOG("rate: %lu, channels: %d\n", rate, channels);
- ret = NeAACDecAudioSpecificConfig(inbuf + skip, inbuf_len - skip,
- &mp4ASC);
+ goto out;
+ skip = ret;
+ ret = aac_set_chunk_tv(afhi, &mp4ASC, &afhi->seconds_total);
if (ret < 0)
- return -E_MP4ASC;
- ret = read_chunk_table(skip);
+ goto out;
+ ret = aac_find_entry_point(umap + skip, numbytes - skip, &skip);
if (ret < 0)
- return ret;
- *frames = num_chunks;
- *seconds = aac_set_chunk_tv(&mp4ASC);
- for (;;) {
- ret = aac_find_entry_point(inbuf, inbuf_len, &skip);
- if (ret >= 0)
- break;
- ret = read(fileno(infile), inbuf, inbuf_size);
- if (ret <= 0)
- return -E_AAC_READ;
- PARA_INFO_LOG("next buffer: %d bytes\n", ret);
- }
- chunk_table[0] = ret;
- for (i = 1; i<= num_chunks; i++)
- chunk_table[i] += ret;
- sprintf(info_str, "audio_file_info1:%zu x %lums\n"
- "audio_file_info2:\n"
- "audio_file_info3:\n",
- num_chunks,
- tv2ms(&af->chunk_tv));
- tv_scale(20, &af->chunk_tv, &af->eof_tv);
- return 1;
+ 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:
+ if (handle)
+ NeAACDecClose(handle);
+ return ret;
}
-/*
- * nothing to do as we'll seek to the correct offset in aac read_chunk() anyway
- */
-static int aac_reposition_stream(__a_unused long unsigned request)
-{
- return 1;
-}
-
-static char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
-{
- int ret;
- size_t pos;
-
- *len = 0;
- if (current_chunk >= num_chunks)
- return NULL;
- pos = chunk_table[current_chunk];
- *len = chunk_table[current_chunk + 1] - chunk_table[current_chunk];
- if (inbuf_size < *len) {
- PARA_INFO_LOG("increasing inbuf for chunk #%lu/%zu to %zd bytes\n",
- current_chunk, num_chunks, *len);
- inbuf = para_realloc(inbuf, *len);
- inbuf_size = *len;
- }
-// PARA_DEBUG_LOG("reading chunk #%lu@%zd (%zd bytes)\n", current_chunk,
-// pos, *len);
- ret = fseek(infile, pos, SEEK_SET);
- if (ret < 0)
- return NULL;
- ret = para_fread(inbuf, *len, 1, infile);
- if (ret != *len)
- return NULL;
-// PARA_DEBUG_LOG("ret: %d, inbuf[0]: %lx - %lx\n", ret, (long unsigned) inbuf[0],
-// (long unsigned) inbuf[4]);
- return (char *)inbuf;
-}
-
-
static const char* aac_suffixes[] = {"m4a", "mp4", NULL};
-/** the init function of the aac audio format handler */
-void aac_afh_init(struct audio_format_handler *p)
+/**
+ * the init function of the aac audio format handler
+ *
+ * \param afh pointer to the struct to initialize
+ */
+void aac_afh_init(struct audio_format_handler *afh)
{
- af = p;
- af->reposition_stream = aac_reposition_stream;
- af->get_file_info = aac_get_file_info,
- af->read_chunk = aac_read_chunk;
- af->close_audio_file = aac_close_audio_file;
- af->get_header_info = NULL;
- af->suffixes = aac_suffixes;
+ afh->get_file_info = aac_get_file_info,
+ afh->suffixes = aac_suffixes;
}
projects / paraslash.git / blobdiff