* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*/
-/** \file aac_afh.c para_server's aac audio format handler */
+/*
+ * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
+ * Ahead Software AG
+ */
+/** \file aac_afh.c para_server's aac audio format handler */
#include "server.cmdline.h"
#include "server.h"
#include "error.h"
#include "string.h"
#include "aac.h"
+#include "fd.h"
/* must be big enough to hold header */
#define DEFAULT_INBUF_SIZE 65536
static FILE *infile;
static int inbuf_size;
static unsigned char *inbuf;
-static ssize_t *chunk_table;
-struct audio_format *af;
-
-unsigned num_chunks, chunk_num;
+static size_t inbuf_len;
+struct audio_format_handler *af;
+static size_t num_chunks;
+static size_t entry;
+static size_t *chunk_table;
NeAACDecHandle handle;
+
static void aac_close_audio_file(void)
{
+ if (!infile)
+ return;
+ fclose(infile);
+ infile = NULL;
+}
+
+static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
+{
+ int i;
+
+ for (i = 0; i + 16 < buflen; i++) {
+ unsigned char *p = buf + i;
+ unsigned sample_count, sample_size;
+
+ if (p[0] != 's' || p[1] != 't' || p[2] != 's' || p[3] != 'z')
+ continue;
+ PARA_INFO_LOG("found stsz@%d\n", i);
+ i += 8;
+ sample_size = aac_read_int32(buf + i);
+ PARA_INFO_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);
+ *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)
+{
+ int ret, i;
+ size_t sum = 0;
+
+ for (;;) {
+ ret = aac_find_stsz(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);
+ }
+ num_chunks = ret;
+ PARA_INFO_LOG("sz table has %zu entries\n", num_chunks);
+ free(chunk_table);
+ chunk_table = para_malloc(num_chunks * sizeof(size_t));
+ for (i = 0; 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;
+ skip += 4;
+ if (i < 10 || i > num_chunks - 10)
+ PARA_DEBUG_LOG("offset #%d: %zu\n", i, chunk_table[i]);
+ }
+ return 1;
+
}
/*
static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
int *seconds)
{
- int ret, skip, decoder_len;
- unsigned inbuf_len;
+ int ret, decoder_len;
+ size_t skip;
unsigned long rate = 0;
unsigned char channels = 0;
+ mp4AudioSpecificConfig mp4ASC;
free(inbuf);
inbuf_size = DEFAULT_INBUF_SIZE;
decoder_len = ret;
handle = aac_open();
ret = NeAACDecInit(handle, inbuf + skip,
- inbuf_len - skip, &rate, &channels);
+ decoder_len, &rate, &channels);
+ 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);
+ if (ret >= 0) {
+ PARA_DEBUG_LOG("mp4ASC.samplingFrequency: %lu\n",
+ mp4ASC.samplingFrequency);
+ } else
+ PARA_WARNING_LOG("no mp4ASC %s\n", "");
+
+ ret = read_chunk_table(skip);
+ if (ret < 0)
+ return ret;
+ *frames = num_chunks;
+ 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);
+ }
+ entry = ret;
+ PARA_INFO_LOG("offset table has %zu entries, entry: %zu\n", num_chunks,
+ entry);
+#if 1
+ sprintf(info_str, "audio_file_info1:%zu x %lums\n"
+ "audio_file_info2:\n"
+ "audio_file_info3:\n",
+ num_chunks,
+ tv2ms(&af->chunk_tv));
+#endif
+#if 1
+ {
+ struct timeval total_tv;
+ tv_scale(num_chunks, &af->chunk_tv, &total_tv);
+ *seconds = tv2ms(&total_tv) / 1000;
+ PARA_INFO_LOG("%d seconds, %zu chunks\n", *seconds, num_chunks);
+ }
+#endif
return 1;
}
*/
static int aac_reposition_stream(long unsigned request)
{
- return -E_AAC_REPOS;
+ return 1;
+// return -E_AAC_REPOS;
}
-static int get_chunk_size(long unsigned chunk_num)
+static char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
{
int ret;
- if (chunk_num >= num_chunks)
- return -1;
- ret = chunk_table[chunk_num + 1] - chunk_table[chunk_num];
- if (!ret)
- return ret;
-#if 0
- PARA_DEBUG_LOG("chunk %d: %lli-%lli (%lli bytes)\n",
- chunk_num,
- chunk_table[chunk_num],
- chunk_table[chunk_num + 1] - 1,
- ret);
-#endif
- return ret;
-}
+ size_t pos;
-char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
-{
+ *len = 0;
+ if (current_chunk >= num_chunks)
+ return NULL;
+ if (!current_chunk) {
+ *len = chunk_table[0];
+ pos = entry;
+ } else {
+ *len = chunk_table[current_chunk] - chunk_table[current_chunk - 1];
+ pos = entry + chunk_table[current_chunk - 1];
+ }
+ if (inbuf_size < *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", NULL};
+/** the init function of the aac audio format handler */
void aac_afh_init(void *p)
{
af = p;
af->close_audio_file = aac_close_audio_file;
af->get_header_info = NULL;
af->chunk_tv.tv_sec = 0;
- af->chunk_tv.tv_usec = 250 * 1000;
+ af->chunk_tv.tv_usec = 23120;
tv_scale(3, &af->chunk_tv, &af->eof_tv);
+ af->suffixes = aac_suffixes;
}