ref: ae68cd1f2bf299003b5d6efabaf285f7ae9208a3
parent: 35b2e5b093e8c753a5a36dfbf5f9276b9935116d
author: knik <knik>
date: Fri Mar 2 10:28:44 EST 2012
The patch enables input on stdin for AAC/AAC+ streams.
--- a/frontend/main.c
+++ b/frontend/main.c
@@ -25,7 +25,7 @@
** Commercial non-GPL licensing of this software is possible.
** For more info contact Nero AG through Mpeg4AAClicense@nero.com.
**
-** $Id: main.c,v 1.86 2009/06/05 16:32:26 menno Exp $
+** $Id: main.c,v 1.87 2012/03/02 15:28:44 knik Exp $
**/
#ifdef _WIN32
@@ -139,6 +139,31 @@
b->bytes_into_buffer = 0;
}
+static void lookforheader(aac_buffer *b)
+{+ int i = 0;
+ while (!b->at_eof )
+ {+ if (b->bytes_into_buffer > 4)
+ {+ if( ((b->buffer[0+i] == 0xff) && ((b->buffer[1+i] & 0xf6) == 0xf0)) ||
+ (b->buffer[0+i] == 'A' && b->buffer[1+i] == 'D' && b->buffer[2+i] == 'I' && b->buffer[3+i] == 'F'))
+ {+ fill_buffer(b);
+ break;
+ } else {+ i++;
+ b->file_offset += 1;
+ b->bytes_consumed += 1;
+ b->bytes_into_buffer -= 1;
+ }
+ } else {+ fill_buffer(b);
+ i = 0;
+ }
+ }
+}
+
static int adts_sample_rates[] = {96000,88200,64000,48000,44100,32000,24000,22050,16000,12000,11025,8000,7350,0,0,0};static int adts_parse(aac_buffer *b, int *bitrate, float *length)
@@ -426,6 +451,8 @@
float length = 0;
int first_time = 1;
+ int retval;
+ int streaminput = 0;
aac_buffer b;
@@ -441,17 +468,39 @@
}
}
- b.infile = fopen(aacfile, "rb");
- if (b.infile == NULL)
+ if (0 == strcmp(aacfile, "-"))
{- /* unable to open file */
- faad_fprintf(stderr, "Error opening file: %s\n", aacfile);
- return 1;
+ b.infile = stdin;
+#ifdef _WIN32
+ setmode(fileno(stdin), O_BINARY);
+#endif
+
+ } else
+ {+ b.infile = fopen(aacfile, "rb");
+ if (b.infile == NULL)
+ {+ /* unable to open file */
+ faad_fprintf(stderr, "Error opening file: %s\n", aacfile);
+ return 1;
+ }
}
- fseek(b.infile, 0, SEEK_END);
- fileread = ftell(b.infile);
- fseek(b.infile, 0, SEEK_SET);
+ retval = fseek(b.infile, 0, SEEK_END);
+#ifdef _WIN32
+ if (0 == strcmp(aacfile, "-")) {+ retval = -1;
+ }
+#endif
+ if (retval )
+ {+ faad_fprintf(stderr, "Input not seekable %s\n", aacfile);
+ fileread = -1;
+ streaminput = 1;
+ } else {+ fileread = ftell(b.infile);
+ fseek(b.infile, 0, SEEK_SET);
+ };
if (!(b.buffer = (unsigned char*)malloc(FAAD_MIN_STREAMSIZE*MAX_CHANNELS)))
{@@ -496,20 +545,40 @@
/* get AAC infos for printing */
header_type = 0;
+ if (streaminput == 1 )
+ lookforheader(&b);
+
if ((b.buffer[0] == 0xFF) && ((b.buffer[1] & 0xF6) == 0xF0))
{- adts_parse(&b, &bitrate, &length);
- fseek(b.infile, tagsize, SEEK_SET);
+ if (streaminput ==1)
+ {+ int frames, frame_length;
+ int samplerate;
+ float frames_per_sec, bytes_per_frame;
+ samplerate = adts_sample_rates[(b.buffer[2]&0x3c)>>2];
+ frame_length = ((((unsigned int)b.buffer[3] & 0x3)) << 11)
+ | (((unsigned int)b.buffer[4]) << 3) | (b.buffer[5] >> 5);
- bread = fread(b.buffer, 1, FAAD_MIN_STREAMSIZE*MAX_CHANNELS, b.infile);
- if (bread != FAAD_MIN_STREAMSIZE*MAX_CHANNELS)
- b.at_eof = 1;
- else
- b.at_eof = 0;
- b.bytes_into_buffer = bread;
- b.bytes_consumed = 0;
- b.file_offset = tagsize;
+ frames_per_sec = (float)samplerate/1024.0f;
+ bytes_per_frame = (float)frame_length/(float)(1000);
+ bitrate = (int)(8. * bytes_per_frame * frames_per_sec + 0.5);
+ length = 1;
+ faad_fprintf(stderr, "Streamed input format samplerate %d channels %d.\n",samplerate,channels);
+ } else {+ adts_parse(&b, &bitrate, &length);
+ fseek(b.infile, tagsize, SEEK_SET);
+
+ bread = fread(b.buffer, 1, FAAD_MIN_STREAMSIZE*MAX_CHANNELS, b.infile);
+ if (bread != FAAD_MIN_STREAMSIZE*MAX_CHANNELS)
+ b.at_eof = 1;
+ else
+ b.at_eof = 0;
+ b.bytes_into_buffer = bread;
+ b.bytes_consumed = 0;
+ b.file_offset = tagsize;
+ }
+
header_type = 1;
} else if (memcmp(b.buffer, "ADIF", 4) == 0) {int skip_size = (b.buffer[4] & 0x80) ? 9 : 0;
@@ -540,7 +609,8 @@
if (b.buffer)
free(b.buffer);
NeAACDecClose(hDecoder);
- fclose(b.infile);
+ if (b.infile != stdin)
+ fclose(b.infile);
return 1;
}
advance_buffer(&b, bread);
@@ -566,7 +636,8 @@
if (infoOnly)
{NeAACDecClose(hDecoder);
- fclose(b.infile);
+ if (b.infile != stdin)
+ fclose(b.infile);
if (b.buffer)
free(b.buffer);
return 0;
@@ -623,7 +694,8 @@
if (b.buffer)
free(b.buffer);
NeAACDecClose(hDecoder);
- fclose(b.infile);
+ if (b.infile != stdin)
+ fclose(b.infile);
return 0;
}
} else {@@ -664,7 +736,8 @@
fclose(adtsFile);
}
- fclose(b.infile);
+ if (b.infile != stdin)
+ fclose(b.infile);
if (!first_time && !adts_out)
close_audio_file(aufile);
@@ -752,6 +825,11 @@
/* initialise the callback structure */
mp4ff_callback_t *mp4cb = malloc(sizeof(mp4ff_callback_t));
+ if (strcmp(mp4file, "-") == 0 ) {+ faad_fprintf(stderr, "Cannot open stdin for MP4 input \n");
+ return 1;
+ }
+
mp4File = fopen(mp4file, "rb");
mp4cb->read = read_callback;
mp4cb->seek = seek_callback;
@@ -1018,6 +1096,7 @@
int result;
int infoOnly = 0;
int writeToStdio = 0;
+ int readFromStdin = 0;
int object_type = LC;
int def_srate = 0;
int downMatrix = 0;
@@ -1231,15 +1310,30 @@
}
/* check for mp4 file */
- mp4file = 0;
- hMP4File = fopen(aacFileName, "rb");
- if (!hMP4File)
- {- faad_fprintf(stderr, "Error opening file: %s\n", aacFileName);
- return 1;
+ if (0 == strcmp(aacFileName, "-")) {+ faad_fprintf(stderr, "Reading from stdin: %s\n", aacFileName);
+ readFromStdin = 1;
+ hMP4File = stdin;
+#ifdef _WIN32
+ setmode(fileno(stdin), O_BINARY);
+#endif
+
+ } else {+
+ mp4file = 0;
+ hMP4File = fopen(aacFileName, "rb");
+ if (!hMP4File)
+ {+ faad_fprintf(stderr, "Error opening file: %s\n", aacFileName);
+ return 1;
+ }
}
+
fread(header, 1, 8, hMP4File);
- fclose(hMP4File);
+
+ if (! readFromStdin )
+ fclose(hMP4File);
+
if (header[4] == 'f' && header[5] == 't' && header[6] == 'y' && header[7] == 'p')
mp4file = 1;
@@ -1248,6 +1342,18 @@
result = decodeMP4file(aacFileName, audioFileName, adtsFileName, writeToStdio,
outputFormat, format, downMatrix, noGapless, infoOnly, adts_out, &length);
} else {+
+ if (readFromStdin == 1) {+ ungetc(header[7],hMP4File);
+ ungetc(header[6],hMP4File);
+ ungetc(header[5],hMP4File);
+ ungetc(header[4],hMP4File);
+ ungetc(header[3],hMP4File);
+ ungetc(header[2],hMP4File);
+ ungetc(header[1],hMP4File);
+ ungetc(header[0],hMP4File);
+ }
+
result = decodeAACfile(aacFileName, audioFileName, adtsFileName, writeToStdio,
def_srate, object_type, outputFormat, format, downMatrix, infoOnly, adts_out,
old_format, &length);