#include "aac.h"
#include "fd.h"
-/** size of the input buffer, must be big enough to hold header */
-#define AAC_INBUF_SIZE 65536
-
-static struct audio_format_handler *af;
-static FILE *infile;
-static unsigned char *inbuf;
-static size_t inbuf_len;
-
-static void aac_close_audio_file(void)
-{
- if (!infile)
- return;
- fclose(infile);
- infile = NULL;
- free(inbuf);
- inbuf = NULL;
-}
-
-static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
+static int aac_find_stsz(unsigned char *buf, off_t buflen, off_t *skip)
{
int i;
*skip = i;
return sample_count;
}
- PARA_WARNING_LOG("stsz not found, buflen: %d\n", buflen);
return -E_STSZ;
}
-static int read_chunk_table(struct audio_format_info *afi, size_t skip)
+static ssize_t aac_compute_chunk_table(struct audio_format_info *afi,
+ unsigned char *map, off_t numbytes)
{
int ret, i;
size_t sum = 0;
+ off_t skip;
- for (;;) {
- ret = aac_find_stsz(inbuf, inbuf_len, &skip);
- if (ret >= 0)
- break;
- ret = read(fileno(infile), inbuf, AAC_INBUF_SIZE);
- if (ret <= 0)
- return -E_AAC_READ;
- PARA_INFO_LOG("next buffer: %d bytes\n", ret);
- }
+ ret = aac_find_stsz(map, numbytes, &skip);
+ if (ret < 0)
+ return 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(infile), 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);
+ if (skip + 4 > numbytes)
+ break;
+ sum += aac_read_int32(map + skip);
afi->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 > afi->chunks_total)
+// PARA_DEBUG_LOG("offset #%d: %zu\n", i, afi->chunk_table[i]);
}
- return 1;
+ return skip;
}
static long unsigned aac_set_chunk_tv(struct audio_format_info *afi,
/*
* 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, off_t numbytes,
+ struct audio_format_info *afi)
{
- 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;
- inbuf = para_malloc(AAC_INBUF_SIZE);
- infile = file;
-
- ret = read(fileno(infile), inbuf, AAC_INBUF_SIZE);
- if (ret <= 0)
- return -E_AAC_READ;
- inbuf_len = ret;
- ret = aac_find_esds(inbuf, inbuf_len, &skip);
+ ret = aac_find_esds(map, numbytes, &skip);
if (ret < 0)
- return ret;
+ goto out;
decoder_len = ret;
handle = aac_open();
- ret = NeAACDecInit(handle, inbuf + skip,
- decoder_len, &rate, &channels);
- if (ret < 0)
- return -E_AACDEC_INIT;
- skip += ret;
+ ret = -E_AACDEC_INIT;
+ if (NeAACDecInit(handle, map + skip, decoder_len, &rate, &channels))
+ goto out;
PARA_INFO_LOG("rate: %lu, channels: %d\n", rate, channels);
- ret = NeAACDecAudioSpecificConfig(inbuf + skip, inbuf_len - skip,
- &mp4ASC);
+ ret = -E_MP4ASC;
+ if (NeAACDecAudioSpecificConfig(map + skip, numbytes - skip, &mp4ASC))
+ goto out;
+ ret = aac_compute_chunk_table(afi, map, numbytes);
if (ret < 0)
- return -E_MP4ASC;
- ret = read_chunk_table(afi, skip);
- if (ret < 0)
- return ret;
+ goto out;
+ skip = ret;
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(infile), inbuf, AAC_INBUF_SIZE);
- if (ret <= 0)
- return -E_AAC_READ;
- PARA_INFO_LOG("next buffer: %d bytes\n", ret);
- }
+ ret = aac_find_entry_point(map + skip, numbytes - skip, &skip);
+ if (ret < 0)
+ goto out;
afi->chunk_table[0] = ret;
for (i = 1; i<= afi->chunks_total; i++)
afi->chunk_table[i] += ret;
afi->chunks_total,
tv2ms(&afi->chunk_tv));
tv_scale(20, &afi->chunk_tv, &afi->eof_tv);
- return 1;
+ ret = 1;
+out:
+ return ret;
}
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->get_file_info = aac_get_file_info,
- af->close_audio_file = aac_close_audio_file;
- af->suffixes = aac_suffixes;
+ afh->get_file_info = aac_get_file_info,
+ afh->suffixes = aac_suffixes;
}
projects / paraslash.git / blobdiff