X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=aac_afh.c;h=8b635c489720fbeb0d247ac566af4e27b995a35f;hp=92b70915621ce3fd4472d9595adb5b9fe5485636;hb=5430c77f1fdf97d92796f44623d257b8124bde24;hpb=1a1048fc81f384826d4cd7416de931f4b6c5646e

diff --git a/aac_afh.c b/aac_afh.c
index 92b70915..8b635c48 100644
--- a/aac_afh.c
+++ b/aac_afh.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006 Andre Noll <maan@systemlinux.org>
+ * 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
@@ -22,33 +22,12 @@
 
 /** \file aac_afh.c para_server's aac audio format handler */
 
-#include "server.cmdline.h"
 #include "server.h"
-#include "afs.h"
 #include "error.h"
 #include "string.h"
 #include "aac.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 unsigned inbuf_len;
-struct audio_format *af;
-
-static unsigned num_chunks, entry;
-
-static size_t *chunk_table;
-NeAACDecHandle handle;
-
-
-static void aac_close_audio_file(void)
-{
-}
-
-static int aac_find_stsz(unsigned char *buf, unsigned buflen, unsigned *skip)
+static int aac_find_stsz(unsigned char *buf, off_t buflen, off_t *skip)
 {
 	int i;
 
@@ -69,184 +48,117 @@ static int aac_find_stsz(unsigned char *buf, unsigned buflen, unsigned *skip)
 		*skip = i;
 		return sample_count;
 	}
-	PARA_WARNING_LOG("stsz not found, buflen: %d\n", buflen);
 	return -E_STSZ;
 }
 
-static int read_chunk_table(unsigned skip)
+static ssize_t aac_compute_chunk_table(struct audio_format_info *afi,
+		unsigned char *map, off_t numbytes)
 {
 	int ret, i;
-	long unsigned sum = 0;
+	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;
+	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 > 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 %d 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: %d bytes\n", inbuf_len);
-		}
-		sum += aac_read_int32(inbuf + skip);
-		chunk_table[i] = sum;
+		sum += aac_read_int32(map + skip);
+		afi->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 > 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,
+		mp4AudioSpecificConfig *mp4ASC)
+{
+	float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023,
+		ms = 1000.0 * afi->chunks_total * tmp / mp4ASC->samplingFrequency;
+	struct timeval total;
+
+	ms2tv(ms, &total);
+	tv_divide(afi->chunks_total, &total, &afi->chunk_tv);
+	PARA_INFO_LOG("%luHz, %fs (%lu x %lums)\n",
+		mp4ASC->samplingFrequency, ms / 1000,
+		afi->chunks_total, tv2ms(&afi->chunk_tv));
+	return ms < 1000? -E_MP4ASC : ms / 1000;
 }
 
 /*
  * 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, off_t numbytes,
+		struct audio_format_info *afi)
 {
-	int ret, skip, decoder_len;
-	unsigned long rate = 0;
+	int i;
+	size_t skip;
+	ssize_t ret;
+	unsigned long rate = 0, decoder_len;
 	unsigned char channels = 0;
 	mp4AudioSpecificConfig mp4ASC;
+	NeAACDecHandle handle;
+	unsigned char *umap = (unsigned char *) map;
 
-	free(inbuf);
-	inbuf_size = DEFAULT_INBUF_SIZE;
-	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);
+	ret = aac_find_esds(umap, 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, umap + skip, decoder_len, &rate, &channels))
+		goto out;
+	if (!channels)
+		goto out;
 	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);
+	ret = -E_MP4ASC;
+	if (NeAACDecAudioSpecificConfig(umap + skip, numbytes - skip, &mp4ASC))
+		goto out;
+	if (!mp4ASC.samplingFrequency)
+		goto out;
+	ret = aac_compute_chunk_table(afi, umap, numbytes);
 	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 %d entries\, entry: %zd\n", num_chunks,
-		entry);
-#if 1
-	sprintf(info_str, "audio_file_info1:%d x %lums\n"
+		goto out;
+	skip = ret;
+	afi->seconds_total = aac_set_chunk_tv(afi, &mp4ASC);
+	ret = aac_find_entry_point(umap + 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->channels = channels;
+	afi->frequency = rate;
+	ret = (afi->chunk_table[afi->chunks_total] - afi->chunk_table[0]) * 8; /* bits */
+	ret += (channels * afi->seconds_total * 500); /* avoid rounding error */
+	afi->bitrate = ret / (channels * afi->seconds_total * 1000);
+	sprintf(afi->info_string, "audio_file_info1:%lu x %lums, "
+		"%uHz, %d channel%s, %ukb/s\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
-	return 1;
+		afi->chunks_total, tv2ms(&afi->chunk_tv),
+		afi->frequency, channels, channels == 1? "" : "s", afi->bitrate
+	);
+	tv_scale(20, &afi->chunk_tv, &afi->eof_tv);
+	ret = 1;
+out:
+	return ret;
 }
 
-/*
- * Simple stream reposition routine
+static const char* aac_suffixes[] = {"m4a", "mp4", NULL};
+/**
+ * the init function of the aac audio format handler
+ *
+ * \param afh pointer to the struct to initialize
  */
-static int aac_reposition_stream(long unsigned request)
-{
-	return 1;
-//	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;
-}
-
-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;
-	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;
-}
-
-void aac_afh_init(void *p)
+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->chunk_tv.tv_sec = 0;
-	af->chunk_tv.tv_usec = 23120;
-	tv_scale(3, &af->chunk_tv, &af->eof_tv);
+	afh->get_file_info = aac_get_file_info,
+	afh->suffixes = aac_suffixes;
 }