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authorMartin Storsjo <martin@martin.st>2012-07-01 12:15:32 +0300
committerMartin Storsjo <martin@martin.st>2012-09-13 23:27:27 +0300
commitbf0d9ddc43b25f0fb56ed69ff72d1c37c29e2db6 (patch)
tree6000aac50369411458eb5b9ee9241cf4b7d04fb2 /aac-enc.c
parent923f3e95f3e332d26f03cf6782f0ab61596ceef2 (diff)
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Add an encoder example
Diffstat (limited to 'aac-enc.c')
-rw-r--r--aac-enc.c234
1 files changed, 234 insertions, 0 deletions
diff --git a/aac-enc.c b/aac-enc.c
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index 0000000..1528881
--- /dev/null
+++ b/aac-enc.c
@@ -0,0 +1,234 @@
+/* ------------------------------------------------------------------
+ * Copyright (C) 2011 Martin Storsjo
+ *
+ * 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
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * 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.
+ * -------------------------------------------------------------------
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include "libAACenc/include/aacenc_lib.h"
+#include "wavreader.h"
+
+void usage(const char* name) {
+ fprintf(stderr, "%s [-r bitrate] [-t aot] [-a afterburner] [-s sbr] [-v vbr] in.wav out.aac\n", name);
+ fprintf(stderr, "Supported AOTs:\n");
+ fprintf(stderr, "\t2\tAAC-LC\n");
+ fprintf(stderr, "\t5\tHE-AAC\n");
+ fprintf(stderr, "\t29\tHE-AAC v2\n");
+ fprintf(stderr, "\t23\tAAC-LD\n");
+ fprintf(stderr, "\t39\tAAC-ELD\n");
+}
+
+int main(int argc, char *argv[]) {
+ int bitrate = 64000;
+ int ch;
+ const char *infile, *outfile;
+ FILE *out;
+ void *wav;
+ int format, sample_rate, channels, bits_per_sample;
+ int input_size;
+ uint8_t* input_buf;
+ int16_t* convert_buf;
+ int aot = 2;
+ int afterburner = 1;
+ int eld_sbr = 0;
+ int vbr = 0;
+ HANDLE_AACENCODER handle;
+ CHANNEL_MODE mode;
+ AACENC_InfoStruct info = { 0 };
+ while ((ch = getopt(argc, argv, "r:t:a:s:v:")) != -1) {
+ switch (ch) {
+ case 'r':
+ bitrate = atoi(optarg);
+ break;
+ case 't':
+ aot = atoi(optarg);
+ break;
+ case 'a':
+ afterburner = atoi(optarg);
+ break;
+ case 's':
+ eld_sbr = atoi(optarg);
+ break;
+ case 'v':
+ vbr = atoi(optarg);
+ break;
+ case '?':
+ default:
+ usage(argv[0]);
+ return 1;
+ }
+ }
+ if (argc - optind < 2) {
+ usage(argv[0]);
+ return 1;
+ }
+ infile = argv[optind];
+ outfile = argv[optind + 1];
+
+ wav = wav_read_open(infile);
+ if (!wav) {
+ fprintf(stderr, "Unable to open wav file %s\n", infile);
+ return 1;
+ }
+ if (!wav_get_header(wav, &format, &channels, &sample_rate, &bits_per_sample, NULL)) {
+ fprintf(stderr, "Bad wav file %s\n", infile);
+ return 1;
+ }
+ if (format != 1) {
+ fprintf(stderr, "Unsupported WAV format %d\n", format);
+ return 1;
+ }
+ if (bits_per_sample != 16) {
+ fprintf(stderr, "Unsupported WAV sample depth %d\n", bits_per_sample);
+ return 1;
+ }
+ switch (channels) {
+ case 1: mode = MODE_1; break;
+ case 2: mode = MODE_2; break;
+ case 3: mode = MODE_1_2; break;
+ case 4: mode = MODE_1_2_1; break;
+ case 5: mode = MODE_1_2_2; break;
+ case 6: mode = MODE_1_2_2_1; break;
+ default:
+ fprintf(stderr, "Unsupported WAV channels %d\n", channels);
+ return 1;
+ }
+ if (aacEncOpen(&handle, 0, channels) != AACENC_OK) {
+ fprintf(stderr, "Unable to open encoder\n");
+ return 1;
+ }
+ if (aacEncoder_SetParam(handle, AACENC_AOT, aot) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the AOT\n");
+ return 1;
+ }
+ if (aot == 39 && eld_sbr) {
+ if (aacEncoder_SetParam(handle, AACENC_SBR_MODE, 1) != AACENC_OK) {
+ fprintf(stderr, "Unable to set SBR mode for ELD\n");
+ return 1;
+ }
+ }
+ if (aacEncoder_SetParam(handle, AACENC_SAMPLERATE, sample_rate) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the AOT\n");
+ return 1;
+ }
+ if (aacEncoder_SetParam(handle, AACENC_CHANNELMODE, mode) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the channel mode\n");
+ return 1;
+ }
+ if (aacEncoder_SetParam(handle, AACENC_CHANNELORDER, 1) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the wav channel order\n");
+ return 1;
+ }
+ if (vbr) {
+ if (aacEncoder_SetParam(handle, AACENC_BITRATEMODE, vbr) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the VBR bitrate mode\n");
+ return 1;
+ }
+ } else {
+ if (aacEncoder_SetParam(handle, AACENC_BITRATE, bitrate) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the bitrate\n");
+ return 1;
+ }
+ }
+ if (aacEncoder_SetParam(handle, AACENC_TRANSMUX, 2) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the ADTS transmux\n");
+ return 1;
+ }
+ if (aacEncoder_SetParam(handle, AACENC_AFTERBURNER, afterburner) != AACENC_OK) {
+ fprintf(stderr, "Unable to set the afterburner mode\n");
+ return 1;
+ }
+ if (aacEncEncode(handle, NULL, NULL, NULL, NULL) != AACENC_OK) {
+ fprintf(stderr, "Unable to initialize the encoder\n");
+ return 1;
+ }
+ if (aacEncInfo(handle, &info) != AACENC_OK) {
+ fprintf(stderr, "Unable to get the encoder info\n");
+ return 1;
+ }
+
+ out = fopen(outfile, "wb");
+ if (!out) {
+ perror(outfile);
+ return 1;
+ }
+
+ input_size = channels*2*info.frameLength;
+ input_buf = (uint8_t*) malloc(input_size);
+ convert_buf = (int16_t*) malloc(input_size);
+
+ while (1) {
+ AACENC_BufDesc in_buf = { 0 }, out_buf = { 0 };
+ AACENC_InArgs in_args = { 0 };
+ AACENC_OutArgs out_args = { 0 };
+ int in_identifier = IN_AUDIO_DATA;
+ int in_size, in_elem_size;
+ int out_identifier = OUT_BITSTREAM_DATA;
+ int out_size, out_elem_size;
+ int read, i;
+ void *in_ptr, *out_ptr;
+ uint8_t outbuf[20480];
+ AACENC_ERROR err;
+
+ read = wav_read_data(wav, input_buf, input_size);
+ for (i = 0; i < read/2; i++) {
+ const uint8_t* in = &input_buf[2*i];
+ convert_buf[i] = in[0] | (in[1] << 8);
+ }
+ if (read <= 0) {
+ in_args.numInSamples = -1;
+ } else {
+ in_ptr = convert_buf;
+ in_size = read;
+ in_elem_size = 2;
+
+ in_args.numInSamples = read/2;
+ in_buf.numBufs = 1;
+ in_buf.bufs = &in_ptr;
+ in_buf.bufferIdentifiers = &in_identifier;
+ in_buf.bufSizes = &in_size;
+ in_buf.bufElSizes = &in_elem_size;
+ }
+ out_ptr = outbuf;
+ out_size = sizeof(outbuf);
+ out_elem_size = 1;
+ out_buf.numBufs = 1;
+ out_buf.bufs = &out_ptr;
+ out_buf.bufferIdentifiers = &out_identifier;
+ out_buf.bufSizes = &out_size;
+ out_buf.bufElSizes = &out_elem_size;
+
+ if ((err = aacEncEncode(handle, &in_buf, &out_buf, &in_args, &out_args)) != AACENC_OK) {
+ if (err == AACENC_ENCODE_EOF)
+ break;
+ fprintf(stderr, "Encoding failed\n");
+ return 1;
+ }
+ if (out_args.numOutBytes == 0)
+ continue;
+ fwrite(outbuf, 1, out_args.numOutBytes, out);
+ }
+ free(input_buf);
+ free(convert_buf);
+ fclose(out);
+ wav_read_close(wav);
+ aacEncClose(&handle);
+
+ return 0;
+}
+