random/mysql selector: make it find m4a files
[paraslash.git] / aac_afh.c
index 436005e..55efeef 100644 (file)
--- a/aac_afh.c
+++ b/aac_afh.c
  *     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"
@@ -24,6 +28,7 @@
 #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;
+
 }
 
 /*
@@ -47,10 +122,11 @@ static void aac_close_audio_file(void)
 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;
@@ -70,9 +146,49 @@ static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
        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;
 }
 
@@ -81,32 +197,44 @@ static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
  */
 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;
@@ -116,6 +244,7 @@ void aac_afh_init(void *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;
 }