Add an encoder example
This commit is contained in:
Martin Storsjo
parent
923f3e95f3
commit
bf0d9ddc43
1
.gitignore
vendored
1
.gitignore
vendored
@ -24,3 +24,4 @@ m4/ltversion.m4
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m4/lt~obsolete.m4
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missing
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stamp-h1
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aac-enc
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@ -32,6 +32,15 @@ lib_LTLIBRARIES = libfdk-aac.la
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libfdk_aac_la_LDFLAGS = -version-info @FDK_AAC_VERSION@ -no-undefined \
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-export-symbols $(top_srcdir)/fdk-aac.sym
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if EXAMPLE
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bin_PROGRAMS = aac-enc$(EXEEXT)
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aac_enc_LDADD = libfdk-aac.la
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aac_enc_SOURCES = aac-enc.c wavreader.c
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noinst_HEADERS = wavreader.h
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endif
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AACDEC_DIR = $(top_srcdir)/libAACdec/src
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AACDEC_SRC = \
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$(AACDEC_DIR)/aacdec_drc.cpp \
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234
aac-enc.c
Normal file
234
aac-enc.c
Normal file
@ -0,0 +1,234 @@
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/* ------------------------------------------------------------------
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* Copyright (C) 2011 Martin Storsjo
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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* -------------------------------------------------------------------
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "libAACenc/include/aacenc_lib.h"
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#include "wavreader.h"
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void usage(const char* name) {
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fprintf(stderr, "%s [-r bitrate] [-t aot] [-a afterburner] [-s sbr] [-v vbr] in.wav out.aac\n", name);
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fprintf(stderr, "Supported AOTs:\n");
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fprintf(stderr, "\t2\tAAC-LC\n");
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fprintf(stderr, "\t5\tHE-AAC\n");
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fprintf(stderr, "\t29\tHE-AAC v2\n");
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fprintf(stderr, "\t23\tAAC-LD\n");
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fprintf(stderr, "\t39\tAAC-ELD\n");
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}
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int main(int argc, char *argv[]) {
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int bitrate = 64000;
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int ch;
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const char *infile, *outfile;
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FILE *out;
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void *wav;
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int format, sample_rate, channels, bits_per_sample;
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int input_size;
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uint8_t* input_buf;
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int16_t* convert_buf;
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int aot = 2;
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int afterburner = 1;
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int eld_sbr = 0;
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int vbr = 0;
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HANDLE_AACENCODER handle;
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CHANNEL_MODE mode;
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AACENC_InfoStruct info = { 0 };
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while ((ch = getopt(argc, argv, "r:t:a:s:v:")) != -1) {
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switch (ch) {
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case 'r':
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bitrate = atoi(optarg);
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break;
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case 't':
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aot = atoi(optarg);
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break;
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case 'a':
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afterburner = atoi(optarg);
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break;
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case 's':
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eld_sbr = atoi(optarg);
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break;
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case 'v':
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vbr = atoi(optarg);
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break;
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case '?':
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default:
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usage(argv[0]);
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return 1;
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}
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}
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if (argc - optind < 2) {
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usage(argv[0]);
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return 1;
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}
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infile = argv[optind];
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outfile = argv[optind + 1];
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wav = wav_read_open(infile);
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if (!wav) {
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fprintf(stderr, "Unable to open wav file %s\n", infile);
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return 1;
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}
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if (!wav_get_header(wav, &format, &channels, &sample_rate, &bits_per_sample, NULL)) {
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fprintf(stderr, "Bad wav file %s\n", infile);
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return 1;
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}
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if (format != 1) {
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fprintf(stderr, "Unsupported WAV format %d\n", format);
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return 1;
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}
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if (bits_per_sample != 16) {
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fprintf(stderr, "Unsupported WAV sample depth %d\n", bits_per_sample);
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return 1;
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}
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switch (channels) {
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case 1: mode = MODE_1; break;
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case 2: mode = MODE_2; break;
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case 3: mode = MODE_1_2; break;
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case 4: mode = MODE_1_2_1; break;
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case 5: mode = MODE_1_2_2; break;
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case 6: mode = MODE_1_2_2_1; break;
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default:
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fprintf(stderr, "Unsupported WAV channels %d\n", channels);
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return 1;
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}
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if (aacEncOpen(&handle, 0, channels) != AACENC_OK) {
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fprintf(stderr, "Unable to open encoder\n");
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return 1;
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}
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if (aacEncoder_SetParam(handle, AACENC_AOT, aot) != AACENC_OK) {
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fprintf(stderr, "Unable to set the AOT\n");
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return 1;
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}
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if (aot == 39 && eld_sbr) {
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if (aacEncoder_SetParam(handle, AACENC_SBR_MODE, 1) != AACENC_OK) {
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fprintf(stderr, "Unable to set SBR mode for ELD\n");
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return 1;
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}
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}
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if (aacEncoder_SetParam(handle, AACENC_SAMPLERATE, sample_rate) != AACENC_OK) {
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fprintf(stderr, "Unable to set the AOT\n");
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return 1;
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}
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if (aacEncoder_SetParam(handle, AACENC_CHANNELMODE, mode) != AACENC_OK) {
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fprintf(stderr, "Unable to set the channel mode\n");
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return 1;
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}
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if (aacEncoder_SetParam(handle, AACENC_CHANNELORDER, 1) != AACENC_OK) {
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fprintf(stderr, "Unable to set the wav channel order\n");
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return 1;
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}
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if (vbr) {
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if (aacEncoder_SetParam(handle, AACENC_BITRATEMODE, vbr) != AACENC_OK) {
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fprintf(stderr, "Unable to set the VBR bitrate mode\n");
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return 1;
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}
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} else {
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if (aacEncoder_SetParam(handle, AACENC_BITRATE, bitrate) != AACENC_OK) {
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fprintf(stderr, "Unable to set the bitrate\n");
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return 1;
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}
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}
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if (aacEncoder_SetParam(handle, AACENC_TRANSMUX, 2) != AACENC_OK) {
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fprintf(stderr, "Unable to set the ADTS transmux\n");
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return 1;
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}
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if (aacEncoder_SetParam(handle, AACENC_AFTERBURNER, afterburner) != AACENC_OK) {
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fprintf(stderr, "Unable to set the afterburner mode\n");
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return 1;
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}
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if (aacEncEncode(handle, NULL, NULL, NULL, NULL) != AACENC_OK) {
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fprintf(stderr, "Unable to initialize the encoder\n");
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return 1;
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}
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if (aacEncInfo(handle, &info) != AACENC_OK) {
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fprintf(stderr, "Unable to get the encoder info\n");
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return 1;
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}
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out = fopen(outfile, "wb");
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if (!out) {
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perror(outfile);
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return 1;
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}
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input_size = channels*2*info.frameLength;
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input_buf = (uint8_t*) malloc(input_size);
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convert_buf = (int16_t*) malloc(input_size);
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while (1) {
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AACENC_BufDesc in_buf = { 0 }, out_buf = { 0 };
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AACENC_InArgs in_args = { 0 };
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AACENC_OutArgs out_args = { 0 };
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int in_identifier = IN_AUDIO_DATA;
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int in_size, in_elem_size;
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int out_identifier = OUT_BITSTREAM_DATA;
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int out_size, out_elem_size;
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int read, i;
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void *in_ptr, *out_ptr;
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uint8_t outbuf[20480];
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AACENC_ERROR err;
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read = wav_read_data(wav, input_buf, input_size);
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for (i = 0; i < read/2; i++) {
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const uint8_t* in = &input_buf[2*i];
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convert_buf[i] = in[0] | (in[1] << 8);
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}
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if (read <= 0) {
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in_args.numInSamples = -1;
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} else {
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in_ptr = convert_buf;
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in_size = read;
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in_elem_size = 2;
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in_args.numInSamples = read/2;
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in_buf.numBufs = 1;
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in_buf.bufs = &in_ptr;
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in_buf.bufferIdentifiers = &in_identifier;
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in_buf.bufSizes = &in_size;
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in_buf.bufElSizes = &in_elem_size;
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}
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out_ptr = outbuf;
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out_size = sizeof(outbuf);
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out_elem_size = 1;
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out_buf.numBufs = 1;
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out_buf.bufs = &out_ptr;
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out_buf.bufferIdentifiers = &out_identifier;
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out_buf.bufSizes = &out_size;
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out_buf.bufElSizes = &out_elem_size;
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if ((err = aacEncEncode(handle, &in_buf, &out_buf, &in_args, &out_args)) != AACENC_OK) {
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if (err == AACENC_ENCODE_EOF)
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break;
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fprintf(stderr, "Encoding failed\n");
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return 1;
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}
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if (out_args.numOutBytes == 0)
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continue;
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fwrite(outbuf, 1, out_args.numOutBytes, out);
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}
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free(input_buf);
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free(convert_buf);
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fclose(out);
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wav_read_close(wav);
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aacEncClose(&handle);
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return 0;
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}
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10
configure.ac
10
configure.ac
@ -7,7 +7,17 @@ AC_CONFIG_MACRO_DIR([m4])
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AM_INIT_AUTOMAKE([tar-ustar foreign])
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m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
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dnl Various options for configure
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AC_ARG_ENABLE([example],
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[AS_HELP_STRING([--enable-example],
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[enable example encoding program (default is no)])],
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[example=$enableval], [example=no])
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dnl Automake conditionals to set
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AM_CONDITIONAL(EXAMPLE, test x$example = xyes)
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dnl Checks for programs.
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AC_PROG_CC
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AC_PROG_CXX
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LT_INIT
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163
wavreader.c
Normal file
163
wavreader.c
Normal file
@ -0,0 +1,163 @@
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/* ------------------------------------------------------------------
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* Copyright (C) 2009 Martin Storsjo
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
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* express or implied.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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* -------------------------------------------------------------------
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*/
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#include "wavreader.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#define TAG(a, b, c, d) (((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
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struct wav_reader {
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FILE *wav;
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uint32_t data_length;
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int format;
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int sample_rate;
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int bits_per_sample;
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int channels;
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int byte_rate;
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int block_align;
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};
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static uint32_t read_tag(struct wav_reader* wr) {
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uint32_t tag = 0;
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tag = (tag << 8) | fgetc(wr->wav);
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tag = (tag << 8) | fgetc(wr->wav);
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tag = (tag << 8) | fgetc(wr->wav);
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tag = (tag << 8) | fgetc(wr->wav);
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return tag;
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}
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static uint32_t read_int32(struct wav_reader* wr) {
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uint32_t value = 0;
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value |= fgetc(wr->wav) << 0;
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value |= fgetc(wr->wav) << 8;
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value |= fgetc(wr->wav) << 16;
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value |= fgetc(wr->wav) << 24;
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return value;
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}
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static uint16_t read_int16(struct wav_reader* wr) {
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uint16_t value = 0;
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value |= fgetc(wr->wav) << 0;
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value |= fgetc(wr->wav) << 8;
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return value;
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}
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void* wav_read_open(const char *filename) {
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struct wav_reader* wr = (struct wav_reader*) malloc(sizeof(*wr));
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long data_pos = 0;
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memset(wr, 0, sizeof(*wr));
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wr->wav = fopen(filename, "rb");
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if (wr->wav == NULL) {
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free(wr);
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return NULL;
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}
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while (1) {
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uint32_t tag, tag2, length;
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tag = read_tag(wr);
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if (feof(wr->wav))
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break;
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length = read_int32(wr);
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if (tag != TAG('R', 'I', 'F', 'F') || length < 4) {
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fseek(wr->wav, length, SEEK_CUR);
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continue;
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}
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tag2 = read_tag(wr);
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length -= 4;
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if (tag2 != TAG('W', 'A', 'V', 'E')) {
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fseek(wr->wav, length, SEEK_CUR);
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continue;
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}
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// RIFF chunk found, iterate through it
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while (length >= 8) {
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uint32_t subtag, sublength;
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subtag = read_tag(wr);
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if (feof(wr->wav))
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break;
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sublength = read_int32(wr);
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length -= 8;
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if (length < sublength)
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break;
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if (subtag == TAG('f', 'm', 't', ' ')) {
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if (sublength < 16) {
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// Insufficient data for 'fmt '
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break;
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}
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wr->format = read_int16(wr);
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wr->channels = read_int16(wr);
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wr->sample_rate = read_int32(wr);
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wr->byte_rate = read_int32(wr);
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wr->block_align = read_int16(wr);
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wr->bits_per_sample = read_int16(wr);
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fseek(wr->wav, sublength - 16, SEEK_CUR);
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} else if (subtag == TAG('d', 'a', 't', 'a')) {
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data_pos = ftell(wr->wav);
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wr->data_length = sublength;
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fseek(wr->wav, sublength, SEEK_CUR);
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} else {
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fseek(wr->wav, sublength, SEEK_CUR);
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}
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length -= sublength;
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}
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if (length > 0) {
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// Bad chunk?
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fseek(wr->wav, length, SEEK_CUR);
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}
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}
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fseek(wr->wav, data_pos, SEEK_SET);
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return wr;
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}
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void wav_read_close(void* obj) {
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struct wav_reader* wr = (struct wav_reader*) obj;
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fclose(wr->wav);
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free(wr);
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}
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int wav_get_header(void* obj, int* format, int* channels, int* sample_rate, int* bits_per_sample, unsigned int* data_length) {
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struct wav_reader* wr = (struct wav_reader*) obj;
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if (format)
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*format = wr->format;
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if (channels)
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*channels = wr->channels;
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if (sample_rate)
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*sample_rate = wr->sample_rate;
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if (bits_per_sample)
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*bits_per_sample = wr->bits_per_sample;
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if (data_length)
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*data_length = wr->data_length;
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return wr->format && wr->sample_rate;
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}
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int wav_read_data(void* obj, unsigned char* data, unsigned int length) {
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struct wav_reader* wr = (struct wav_reader*) obj;
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int n;
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if (wr->wav == NULL)
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return -1;
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if (length > wr->data_length)
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length = wr->data_length;
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n = fread(data, 1, length, wr->wav);
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wr->data_length -= length;
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return n;
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}
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37
wavreader.h
Normal file
37
wavreader.h
Normal file
@ -0,0 +1,37 @@
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/* ------------------------------------------------------------------
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* Copyright (C) 2009 Martin Storsjo
|
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*
|
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* Licensed under the Apache License, Version 2.0 (the "License");
|
||||
* you may not use this file except in compliance with the License.
|
||||
* You may obtain a copy of the License at
|
||||
*
|
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* http://www.apache.org/licenses/LICENSE-2.0
|
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*
|
||||
* Unless required by applicable law or agreed to in writing, software
|
||||
* distributed under the License is distributed on an "AS IS" BASIS,
|
||||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
|
||||
* express or implied.
|
||||
* See the License for the specific language governing permissions
|
||||
* and limitations under the License.
|
||||
* -------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifndef WAVREADER_H
|
||||
#define WAVREADER_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
void* wav_read_open(const char *filename);
|
||||
void wav_read_close(void* obj);
|
||||
|
||||
int wav_get_header(void* obj, int* format, int* channels, int* sample_rate, int* bits_per_sample, unsigned int* data_length);
|
||||
int wav_read_data(void* obj, unsigned char* data, unsigned int length);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user