X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=aac_afh.c;h=be301c5ce38f530bf29ddef4781f89c4d2b4926b;hp=20f142733a1bbb1a46c27c96706614d1efe9c775;hb=28ca8e57ce76f5496f0d1ba143ec2c1c725bc90a;hpb=fcbaa47c0cb6e3e45bf1c465180752289bbe8b6b

diff --git a/aac_afh.c b/aac_afh.c
index 20f14273..be301c5c 100644
--- a/aac_afh.c
+++ b/aac_afh.c
@@ -1,19 +1,7 @@
 /*
  * 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
- *     the Free Software Foundation; either version 2 of the License, or
- *     (at your option) any later version.
- *
- *     This program is distributed in the hope that it will be useful,
- *     but WITHOUT ANY WARRANTY; without even the implied warranty of
- *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *     GNU General Public License for more details.
- *
- *     You should have received a copy of the GNU General Public License
- *     along with this program; if not, write to the Free Software
- *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ * Licensed under the GPL v2. For licencing details see COPYING.
  */
 /*
  * based in parts on libfaad, Copyright (C) 2003-2005 M. Bakker,
@@ -22,18 +10,12 @@
 
 /** \file aac_afh.c para_server's aac audio format handler */
 
-#include "server.cmdline.h"
 #include "server.h"
-#include "vss.h"
 #include "error.h"
 #include "string.h"
 #include "aac.h"
-#include "fd.h"
-
-/** size of the input buffer, must be big enough to hold header */
-#define AAC_INBUF_SIZE 65536
 
-static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
+static int aac_find_stsz(unsigned char *buf, size_t buflen, off_t *skip)
 {
 	int i;
 
@@ -54,127 +36,114 @@ static int aac_find_stsz(unsigned char *buf, unsigned buflen, size_t *skip)
 		*skip = i;
 		return sample_count;
 	}
-	PARA_WARNING_LOG("stsz not found, buflen: %d\n", buflen);
 	return -E_STSZ;
 }
 
-static int read_chunk_table(FILE *file, struct audio_format_info *afi,
-		unsigned char *inbuf, size_t inbuf_len, size_t skip)
+static ssize_t aac_compute_chunk_table(struct audio_format_info *afi,
+		unsigned char *map, size_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(file), inbuf, AAC_INBUF_SIZE);
-		if (ret <= 0)
-			return -E_AAC_READ;
-		inbuf_len = ret;
-		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(file), 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,
-		mp4AudioSpecificConfig *mp4ASC)
+static int aac_set_chunk_tv(struct audio_format_info *afi,
+		mp4AudioSpecificConfig *mp4ASC, long unsigned *seconds)
 {
-	float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023,
-		ms = 1000.0 * afi->chunks_total * tmp / mp4ASC->samplingFrequency;
+	float tmp = mp4ASC->sbr_present_flag == 1? 2047 : 1023;
 	struct timeval total;
+	long unsigned ms = 1000.0 * afi->chunks_total * tmp
+		/ mp4ASC->samplingFrequency;
 
+	if (!mp4ASC->samplingFrequency)
+		return -E_MP4ASC;
+	ms = 1000.0 * afi->chunks_total * tmp / mp4ASC->samplingFrequency;
 	ms2tv(ms, &total);
 	tv_divide(afi->chunks_total, &total, &afi->chunk_tv);
-	PARA_INFO_LOG("%luHz, %fs (%lu x %lums)\n",
+	PARA_INFO_LOG("%luHz, %lus (%lu x %lums)\n",
 		mp4ASC->samplingFrequency, ms / 1000,
 		afi->chunks_total, tv2ms(&afi->chunk_tv));
-	return ms / 1000;
+	if (ms < 1000)
+		return -E_MP4ASC;
+	*seconds = ms / 1000;
+	return 1;
 }
 
 /*
  * 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, size_t numbytes,
+		struct audio_format_info *afi)
 {
-	int i, ret, decoder_len;
-	size_t inbuf_len, skip;
-	unsigned long rate = 0;
-	unsigned char channels = 0, *inbuf = para_malloc(AAC_INBUF_SIZE);
+	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;
 
-	ret = read(fileno(file), inbuf, AAC_INBUF_SIZE);
-	if (ret <= 0) {
-		ret = -E_AAC_READ;
-		goto out;
-	}
-	inbuf_len = ret;
-	ret = aac_find_esds(inbuf, inbuf_len, &skip);
+	ret = aac_find_esds(umap, numbytes, &skip, &decoder_len);
 	if (ret < 0)
 		goto out;
-	decoder_len = ret;
 	handle = aac_open();
-	ret = NeAACDecInit(handle, inbuf + skip, decoder_len, &rate, &channels);
-	if (ret < 0) {
-		ret = -E_AACDEC_INIT;
+	ret = -E_AAC_AFH_INIT;
+	if (NeAACDecInit(handle, umap + skip, decoder_len, &rate, &channels))
+		goto out;
+	if (!channels)
 		goto out;
-	}
-	skip += ret;
 	PARA_INFO_LOG("rate: %lu, channels: %d\n", rate, channels);
 	ret = -E_MP4ASC;
-	if (NeAACDecAudioSpecificConfig(inbuf + skip, inbuf_len - skip,
-			&mp4ASC) < 0)
+	if (NeAACDecAudioSpecificConfig(umap + skip, numbytes - skip, &mp4ASC))
 		goto out;
-	ret = read_chunk_table(file, afi, inbuf, inbuf_len, skip);
+	if (!mp4ASC.samplingFrequency)
+		goto out;
+	ret = aac_compute_chunk_table(afi, umap, numbytes);
+	if (ret < 0)
+		goto out;
+	skip = ret;
+	ret = aac_set_chunk_tv(afi, &mp4ASC, &afi->seconds_total);
+	if (ret < 0)
+		goto out;
+	ret = aac_find_entry_point(umap + skip, numbytes - skip, &skip);
 	if (ret < 0)
 		goto out;
-	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(file), inbuf, AAC_INBUF_SIZE);
-		if (ret <= 0) {
-			ret = -E_AAC_READ;
-			goto out;
-		}
-		inbuf_len = ret;
-		PARA_INFO_LOG("next buffer: %d bytes\n", ret);
-	}
 	afi->chunk_table[0] = ret;
 	for (i = 1; i<= afi->chunks_total; i++)
 		afi->chunk_table[i] += ret;
-	sprintf(afi->info_string, "audio_file_info1:%lu x %lums\n"
+	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",
-		afi->chunks_total,
-		tv2ms(&afi->chunk_tv));
+		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:
-	free(inbuf);
 	return ret;
 }