| 1 | /* |
| 2 | * Copyright (C) 2013 nu774 |
| 3 | * For conditions of distribution and use, see copyright notice in COPYING |
| 4 | */ |
| 5 | #if HAVE_CONFIG_H |
| 6 | # include "config.h" |
| 7 | #endif |
| 8 | #if HAVE_STDINT_H |
| 9 | # include <stdint.h> |
| 10 | #endif |
| 11 | #include <stdio.h> |
| 12 | #include <stdlib.h> |
| 13 | #include "aacenc.h" |
| 14 | |
| 15 | int aacenc_is_sbr_active(const aacenc_param_t *params) |
| 16 | { |
| 17 | switch (params->profile) { |
| 18 | case AOT_SBR: case AOT_PS: case AOT_MP2_SBR: case AOT_MP2_PS: |
| 19 | case AOT_DABPLUS_SBR: case AOT_DABPLUS_PS: |
| 20 | case AOT_DRM_SBR: case AOT_DRM_MPEG_PS: |
| 21 | return 1; |
| 22 | } |
| 23 | if (params->profile == AOT_ER_AAC_ELD && params->lowdelay_sbr) |
| 24 | return 1; |
| 25 | return 0; |
| 26 | } |
| 27 | |
| 28 | static |
| 29 | int aacenc_channel_mode(const pcm_sample_description_t *format) |
| 30 | { |
| 31 | uint32_t chanmask = format->channel_mask; |
| 32 | |
| 33 | if (format->channels_per_frame > 6) |
| 34 | return 0; |
| 35 | if (!chanmask) { |
| 36 | static uint32_t defaults[] = { 0x4, 0x3, 0x7, 0, 0x37, 0x3f }; |
| 37 | chanmask = defaults[format->channels_per_frame - 1]; |
| 38 | } |
| 39 | switch (chanmask) { |
| 40 | case 0x3: return MODE_2; |
| 41 | case 0x4: return MODE_1; |
| 42 | case 0x7: return MODE_1_2; |
| 43 | case 0x37: return MODE_1_2_2; |
| 44 | case 0x3f: return MODE_1_2_2_1; |
| 45 | case 0x107: return MODE_1_2_1; |
| 46 | case 0x607: return MODE_1_2_2; |
| 47 | case 0x60f: return MODE_1_2_2_1; |
| 48 | } |
| 49 | return 0; |
| 50 | } |
| 51 | |
| 52 | int aacenc_init(HANDLE_AACENCODER *encoder, const aacenc_param_t *params, |
| 53 | const pcm_sample_description_t *format, |
| 54 | AACENC_InfoStruct *info) |
| 55 | { |
| 56 | int channel_mode; |
| 57 | int aot; |
| 58 | |
| 59 | *encoder = 0; |
| 60 | if ((channel_mode = aacenc_channel_mode(format)) == 0) { |
| 61 | fprintf(stderr, "ERROR: unsupported channel layout\n"); |
| 62 | goto FAIL; |
| 63 | } |
| 64 | if (aacEncOpen(encoder, 0, 0) != AACENC_OK) { |
| 65 | fprintf(stderr, "ERROR: aacEncOpen() failed\n"); |
| 66 | goto FAIL; |
| 67 | } |
| 68 | aot = (params->profile ? params->profile : AOT_AAC_LC); |
| 69 | if (aacEncoder_SetParam(*encoder, AACENC_AOT, aot) != AACENC_OK) { |
| 70 | fprintf(stderr, "ERROR: unsupported profile\n"); |
| 71 | goto FAIL; |
| 72 | } |
| 73 | if (params->bitrate_mode == 0) |
| 74 | aacEncoder_SetParam(*encoder, AACENC_BITRATE, params->bitrate); |
| 75 | else if (aacEncoder_SetParam(*encoder, AACENC_BITRATEMODE, |
| 76 | params->bitrate_mode) != AACENC_OK) { |
| 77 | fprintf(stderr, "ERROR: unsupported bitrate mode\n"); |
| 78 | goto FAIL; |
| 79 | } |
| 80 | if (aacEncoder_SetParam(*encoder, AACENC_SAMPLERATE, |
| 81 | format->sample_rate) != AACENC_OK) { |
| 82 | fprintf(stderr, "ERROR: unsupported sample rate\n"); |
| 83 | goto FAIL; |
| 84 | } |
| 85 | aacEncoder_SetParam(*encoder, AACENC_CHANNELMODE, channel_mode); |
| 86 | aacEncoder_SetParam(*encoder, AACENC_BANDWIDTH, params->bandwidth); |
| 87 | aacEncoder_SetParam(*encoder, AACENC_CHANNELORDER, 1); |
| 88 | aacEncoder_SetParam(*encoder, AACENC_AFTERBURNER, !!params->afterburner); |
| 89 | |
| 90 | if (aot == AOT_ER_AAC_ELD && params->lowdelay_sbr) |
| 91 | aacEncoder_SetParam(*encoder, AACENC_SBR_MODE, 1); |
| 92 | |
| 93 | if (aacEncoder_SetParam(*encoder, AACENC_TRANSMUX, |
| 94 | params->transport_format) != AACENC_OK) { |
| 95 | fprintf(stderr, "ERROR: unsupported transport format\n"); |
| 96 | goto FAIL; |
| 97 | } |
| 98 | if (aacEncoder_SetParam(*encoder, AACENC_SIGNALING_MODE, |
| 99 | params->sbr_signaling) != AACENC_OK) { |
| 100 | fprintf(stderr, "ERROR: failed to set SBR signaling mode\n"); |
| 101 | goto FAIL; |
| 102 | } |
| 103 | if (params->adts_crc_check) |
| 104 | aacEncoder_SetParam(*encoder, AACENC_PROTECTION, 1); |
| 105 | if (params->header_period) |
| 106 | aacEncoder_SetParam(*encoder, AACENC_HEADER_PERIOD, |
| 107 | params->header_period); |
| 108 | |
| 109 | if (aacEncEncode(*encoder, 0, 0, 0, 0) != AACENC_OK) { |
| 110 | fprintf(stderr, "ERROR: encoder initialization failed\n"); |
| 111 | goto FAIL; |
| 112 | } |
| 113 | if (aacEncInfo(*encoder, info) != AACENC_OK) { |
| 114 | fprintf(stderr, "ERROR: cannot retrieve encoder info\n"); |
| 115 | goto FAIL; |
| 116 | } |
| 117 | return 0; |
| 118 | FAIL: |
| 119 | if (encoder) |
| 120 | aacEncClose(encoder); |
| 121 | return -1; |
| 122 | } |
| 123 | |
| 124 | int aac_encode_frame(HANDLE_AACENCODER encoder, |
| 125 | const pcm_sample_description_t *format, |
| 126 | const int16_t *input, unsigned iframes, |
| 127 | uint8_t **output, uint32_t *olen, uint32_t *osize) |
| 128 | { |
| 129 | uint32_t ilen = iframes * format->channels_per_frame; |
| 130 | AACENC_BufDesc ibdesc = { 0 }, obdesc = { 0 }; |
| 131 | AACENC_InArgs iargs = { 0 }; |
| 132 | AACENC_OutArgs oargs = { 0 }; |
| 133 | void *ibufs[] = { (void*)input }; |
| 134 | void *obufs[1]; |
| 135 | INT ibuf_ids[] = { IN_AUDIO_DATA }; |
| 136 | INT obuf_ids[] = { OUT_BITSTREAM_DATA }; |
| 137 | INT ibuf_sizes[] = { ilen * sizeof(int16_t) }; |
| 138 | INT obuf_sizes[1]; |
| 139 | INT ibuf_el_sizes[] = { sizeof(int16_t) }; |
| 140 | INT obuf_el_sizes[] = { 1 }; |
| 141 | AACENC_ERROR err; |
| 142 | unsigned channel_mode, obytes; |
| 143 | |
| 144 | channel_mode = aacEncoder_GetParam(encoder, AACENC_CHANNELMODE); |
| 145 | obytes = 6144 / 8 * channel_mode + 7; |
| 146 | if (!*output || *osize < obytes) { |
| 147 | *osize = obytes; |
| 148 | *output = realloc(*output, obytes); |
| 149 | } |
| 150 | obufs[0] = *output; |
| 151 | obuf_sizes[0] = obytes; |
| 152 | |
| 153 | iargs.numInSamples = ilen ? ilen : -1; /* -1 for signaling EOF */ |
| 154 | ibdesc.numBufs = 1; |
| 155 | ibdesc.bufs = ibufs; |
| 156 | ibdesc.bufferIdentifiers = ibuf_ids; |
| 157 | ibdesc.bufSizes = ibuf_sizes; |
| 158 | ibdesc.bufElSizes = ibuf_el_sizes; |
| 159 | obdesc.numBufs = 1; |
| 160 | obdesc.bufs = obufs; |
| 161 | obdesc.bufferIdentifiers = obuf_ids; |
| 162 | obdesc.bufSizes = obuf_sizes; |
| 163 | obdesc.bufElSizes = obuf_el_sizes; |
| 164 | |
| 165 | err = aacEncEncode(encoder, &ibdesc, &obdesc, &iargs, &oargs); |
| 166 | if (err != AACENC_ENCODE_EOF && err != AACENC_OK) { |
| 167 | fprintf(stderr, "ERROR: aacEncEncode() failed\n"); |
| 168 | return -1; |
| 169 | } |
| 170 | *olen = oargs.numOutBytes; |
| 171 | return oargs.numInSamples; |
| 172 | } |