X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=aac_afh.c;h=fdb37a7e0f3d8c89ac1ee6992aad2cfeb920f763;hp=b7e828f4d7c76287e871fee87dc17023215a80ab;hb=3c5c2ebfc2d651f2f77d0df89cbb58a2068bcad0;hpb=2187e113d02a2257cbbb02902a942946ffdc2e7e

diff --git a/aac_afh.c b/aac_afh.c
index b7e828f4..fdb37a7e 100644
--- a/aac_afh.c
+++ b/aac_afh.c
@@ -15,15 +15,21 @@
  *     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 "afs.h"
+#include "afh.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
@@ -31,20 +37,23 @@
 static FILE *infile;
 static int inbuf_size;
 static unsigned char *inbuf;
-static unsigned inbuf_len;
-struct audio_format *af;
-
-static unsigned num_chunks, entry;
+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, unsigned *skip)
+static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
 {
 	int i;
 
@@ -66,14 +75,13 @@ static int aac_find_stsz(unsigned char *buf, unsigned buflen, unsigned *skip)
 		return sample_count;
 	}
 	PARA_WARNING_LOG("stsz not found, buflen: %d\n", buflen);
-	return -E_STCO;
+	return -E_STSZ;
 }
 
-
-static int read_stsz(unsigned skip)
+static int read_chunk_table(size_t skip)
 {
 	int ret, i;
-	long unsigned sum = 0;
+	size_t sum = 0;
 
 	for (;;) {
 		ret = aac_find_stsz(inbuf, inbuf_len, &skip);
@@ -85,7 +93,7 @@ static int read_stsz(unsigned skip)
 		PARA_INFO_LOG("next buffer: %d bytes\n", ret);
 	}
 	num_chunks = ret;
-	PARA_INFO_LOG("sz table has %d entries\n", num_chunks);
+	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++) {
@@ -97,18 +105,31 @@ static int read_stsz(unsigned skip)
 				return -E_AAC_READ;
 			inbuf_len = ret + skip;
 			skip = 0;
-			PARA_INFO_LOG("next buffer: %d bytes\n", inbuf_len);
+			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: %d\n", i, chunk_table[i]);
+		if (i < 10 || i + 10 > num_chunks)
+			PARA_DEBUG_LOG("offset #%d: %zu\n", i, chunk_table[i]);
 	}
 	return 1;
 
 }
 
+long unsigned aac_set_chunk_tv(mp4AudioSpecificConfig *mp4ASC)
+{
+	float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023,
+		ms = 1000.0 * num_chunks * tmp / mp4ASC->samplingFrequency;
+	struct timeval total;
+
+	ms2tv(ms, &total);
+	tv_divide(num_chunks, &total, &af->chunk_tv);
+	PARA_INFO_LOG("%luHz, %fs (%zd x %lums)\n",
+		mp4ASC->samplingFrequency, ms / 1000,
+		num_chunks, tv2ms(&af->chunk_tv));
+	return ms / 1000;
+}
 
 /*
  * Init m4a file and write some tech data to given pointers.
@@ -116,7 +137,8 @@ static int read_stsz(unsigned skip)
 static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
 	int *seconds)
 {
-	int ret, skip, decoder_len;
+	int ret, decoder_len;
+	size_t skip;
 	unsigned long rate = 0;
 	unsigned char channels = 0;
 	mp4AudioSpecificConfig mp4ASC;
@@ -126,12 +148,9 @@ static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
 	inbuf = para_malloc(inbuf_size);
 	infile = file;
 
-	PARA_INFO_LOG("file: %p\n", file);
 	ret = read(fileno(infile), inbuf, inbuf_size);
-	PARA_INFO_LOG("read %d bytes\n", ret);
 	if (ret <= 0)
 		return -E_AAC_READ;
-	PARA_INFO_LOG("checking aac %d bytes\n", ret);
 	inbuf_len = ret;
 	ret = aac_find_esds(inbuf, inbuf_len, &skip);
 	if (ret < 0)
@@ -144,19 +163,17 @@ static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
 		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_stsz(skip);
+	ret = NeAACDecAudioSpecificConfig(inbuf + skip, inbuf_len - skip,
+		&mp4ASC);
+	if (ret < 0)
+		return -E_MP4ASC;
+	ret = read_chunk_table(skip);
 	if (ret < 0)
 		return ret;
 	*frames = num_chunks;
+	*seconds = aac_set_chunk_tv(&mp4ASC);
 	for (;;) {
-		ret = aac_find_entry(inbuf, inbuf_len, &skip);
+		ret = aac_find_entry_point(inbuf, inbuf_len, &skip);
 		if (ret >= 0)
 			break;
 		ret = read(fileno(infile), inbuf, inbuf_size);
@@ -165,23 +182,12 @@ static int aac_get_file_info(FILE *file, char *info_str, long unsigned *frames,
 		PARA_INFO_LOG("next buffer: %d bytes\n", ret);
 	}
 	entry = ret;
-	PARA_INFO_LOG("offset table has %d entries\, entry: %zd\n", num_chunks,
-		entry);
-#if 1
-	sprintf(info_str, "audio_file_info1:%d x %lums\n"
+	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, %d chunks\n", *seconds, num_chunks);
-	}
-#endif
+	tv_scale(20, &af->chunk_tv, &af->eof_tv);
 	return 1;
 }
 
@@ -190,20 +196,11 @@ 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;
-}
-
-static __must_check int para_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
-{
-	size_t res = fread(ptr, size, nmemb, stream);
-	if (res == nmemb)
-		return size * nmemb;
-	if (feof(stream))
-		return 0;
-	return -E_FREAD;
+	return 1;
+//	return -E_AAC_REPOS;
 }
 
-char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
+static char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
 {
 	int ret;
 	size_t pos;
@@ -212,14 +209,11 @@ char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
 	if (current_chunk >= num_chunks)
 		return NULL;
 	if (!current_chunk) {
-		*len = entry;
-		pos = 0;
-	} else if (current_chunk == 1) {
 		*len = chunk_table[0];
 		pos = entry;
 	} else {
-		*len = chunk_table[current_chunk - 1] - chunk_table[current_chunk - 2];
-		pos = entry + chunk_table[current_chunk - 2];
+		*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);
@@ -238,7 +232,9 @@ char *aac_read_chunk(long unsigned current_chunk, ssize_t *len)
 	return (char *)inbuf;
 }
 
-void aac_afh_init(void *p)
+static const char* aac_suffixes[] = {"m4a", NULL};
+/** the init function of the aac audio format handler */
+void aac_afh_init(struct audio_format_handler *p)
 {
 	af = p;
 	af->reposition_stream = aac_reposition_stream;
@@ -246,7 +242,5 @@ void aac_afh_init(void *p)
 	af->read_chunk = aac_read_chunk;
 	af->close_audio_file = aac_close_audio_file;
 	af->get_header_info = NULL;
-	af->chunk_tv.tv_sec = 0;
-	af->chunk_tv.tv_usec = 23120;
-	tv_scale(3, &af->chunk_tv, &af->eof_tv);
+	af->suffixes = aac_suffixes;
 }