| 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 <string.h> |
| 14 | #include "aacenc.h" |
| 15 | |
| 16 | int aacenc_is_sbr_ratio_available() |
| 17 | { |
| 18 | #if AACENCODER_LIB_VL0 < 3 || (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1<4) |
| 19 | return 0; |
| 20 | #else |
| 21 | LIB_INFO lib_info; |
| 22 | aacenc_get_lib_info(&lib_info); |
| 23 | return lib_info.version > 0x03040000; |
| 24 | #endif |
| 25 | } |
| 26 | |
| 27 | int aacenc_is_sbr_active(const aacenc_param_t *params) |
| 28 | { |
| 29 | switch (params->profile) { |
| 30 | case AOT_SBR: case AOT_PS: case AOT_MP2_SBR: case AOT_MP2_PS: |
| 31 | case AOT_DABPLUS_SBR: case AOT_DABPLUS_PS: |
| 32 | case AOT_DRM_SBR: case AOT_DRM_MPEG_PS: |
| 33 | return 1; |
| 34 | } |
| 35 | if (params->profile == AOT_ER_AAC_ELD && params->lowdelay_sbr) |
| 36 | return 1; |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | int aacenc_is_dual_rate_sbr(const aacenc_param_t *params) |
| 41 | { |
| 42 | if (params->profile == AOT_PS || params->profile == AOT_MP2_PS) |
| 43 | return 1; |
| 44 | else if (params->profile == AOT_SBR || params->profile == AOT_MP2_SBR) |
| 45 | return params->sbr_ratio == 0 || params->sbr_ratio == 2; |
| 46 | else if (params->profile == AOT_ER_AAC_ELD && params->lowdelay_sbr) |
| 47 | return params->sbr_ratio == 2; |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | void aacenc_get_lib_info(LIB_INFO *info) |
| 52 | { |
| 53 | LIB_INFO *lib_info = 0; |
| 54 | lib_info = calloc(FDK_MODULE_LAST, sizeof(LIB_INFO)); |
| 55 | if (aacEncGetLibInfo(lib_info) == AACENC_OK) { |
| 56 | int i; |
| 57 | for (i = 0; i < FDK_MODULE_LAST; ++i) { |
| 58 | if (lib_info[i].module_id == FDK_AACENC) { |
| 59 | memcpy(info, &lib_info[i], sizeof(LIB_INFO)); |
| 60 | break; |
| 61 | } |
| 62 | } |
| 63 | } |
| 64 | free(lib_info); |
| 65 | } |
| 66 | |
| 67 | static const unsigned aacenc_sampling_freq_tab[] = { |
| 68 | 96000, 88200, 64000, 48000, 44100, 32000, 24000, 22050, |
| 69 | 16000, 12000, 11025, 8000, 7350, 0, 0, 0 |
| 70 | }; |
| 71 | |
| 72 | static |
| 73 | unsigned sampling_freq_index(unsigned rate) |
| 74 | { |
| 75 | unsigned i; |
| 76 | for (i = 0; aacenc_sampling_freq_tab[i]; ++i) |
| 77 | if (aacenc_sampling_freq_tab[i] == rate) |
| 78 | return i; |
| 79 | return 0xf; |
| 80 | } |
| 81 | |
| 82 | /* |
| 83 | * Append backward compatible SBR/PS signaling to implicit signaling ASC, |
| 84 | * if SBR/PS is present. |
| 85 | */ |
| 86 | int aacenc_mp4asc(const aacenc_param_t *params, |
| 87 | const uint8_t *asc, uint32_t ascsize, |
| 88 | uint8_t *outasc, uint32_t *outsize) |
| 89 | { |
| 90 | unsigned asc_sfreq = aacenc_sampling_freq_tab[(asc[0]&0x7)<<1 |asc[1]>>7]; |
| 91 | unsigned shift = aacenc_is_dual_rate_sbr(params); |
| 92 | |
| 93 | switch (params->profile) { |
| 94 | case AOT_SBR: |
| 95 | case AOT_PS: |
| 96 | if (!shift) |
| 97 | break; |
| 98 | if (*outsize < ascsize + 3) |
| 99 | return -1; |
| 100 | memcpy(outasc, asc, ascsize); |
| 101 | /* syncExtensionType:11 (value:0x2b7) */ |
| 102 | outasc[ascsize+0] = 0x2b << 1; |
| 103 | outasc[ascsize+1] = 0x7 << 5; |
| 104 | /* extensionAudioObjectType:5 (value:5)*/ |
| 105 | outasc[ascsize+1] |= 5; |
| 106 | /* sbrPresentFlag:1 (value:1) */ |
| 107 | outasc[ascsize+2] = 0x80; |
| 108 | /* extensionSamplingFrequencyIndex:4 */ |
| 109 | outasc[ascsize+2] |= sampling_freq_index(asc_sfreq << shift) << 3; |
| 110 | if (params->profile == AOT_SBR) { |
| 111 | *outsize = ascsize + 3; |
| 112 | return 0; |
| 113 | } |
| 114 | if (*outsize < ascsize + 5) |
| 115 | return -1; |
| 116 | /* syncExtensionType:11 (value:0x548) */ |
| 117 | outasc[ascsize+2] |= 0x5; |
| 118 | outasc[ascsize+3] = 0x48; |
| 119 | /* psPresentFlag:1 (value:1) */ |
| 120 | outasc[ascsize+4] = 0x80; |
| 121 | *outsize = ascsize + 5; |
| 122 | return 0; |
| 123 | } |
| 124 | if (*outsize < ascsize) |
| 125 | return -1; |
| 126 | memcpy(outasc, asc, ascsize); |
| 127 | *outsize = ascsize; |
| 128 | return 0; |
| 129 | } |
| 130 | |
| 131 | static |
| 132 | int aacenc_channel_mode(const pcm_sample_description_t *format) |
| 133 | { |
| 134 | uint32_t chanmask = format->channel_mask; |
| 135 | |
| 136 | if (format->channels_per_frame > 8) |
| 137 | return 0; |
| 138 | if (!chanmask) { |
| 139 | static uint32_t defaults[] = { 0x4, 0x3, 0x7, 0, 0x37, 0x3f, 0, 0x63f }; |
| 140 | chanmask = defaults[format->channels_per_frame - 1]; |
| 141 | } |
| 142 | switch (chanmask) { |
| 143 | case 0x3: return MODE_2; |
| 144 | case 0x4: return MODE_1; |
| 145 | case 0x7: return MODE_1_2; |
| 146 | case 0x37: return MODE_1_2_2; |
| 147 | case 0x3f: return MODE_1_2_2_1; |
| 148 | case 0x107: return MODE_1_2_1; |
| 149 | case 0x607: return MODE_1_2_2; |
| 150 | case 0x60f: return MODE_1_2_2_1; |
| 151 | #if AACENCODER_LIB_VL0 > 3 || (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1>=4) |
| 152 | case 0xff: return MODE_1_2_2_2_1; |
| 153 | case 0x63f: return MODE_7_1_REAR_SURROUND; |
| 154 | #endif |
| 155 | } |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | int aacenc_init(HANDLE_AACENCODER *encoder, const aacenc_param_t *params, |
| 160 | const pcm_sample_description_t *format, |
| 161 | AACENC_InfoStruct *info) |
| 162 | { |
| 163 | int channel_mode; |
| 164 | int aot; |
| 165 | LIB_INFO lib_info; |
| 166 | |
| 167 | *encoder = 0; |
| 168 | aacenc_get_lib_info(&lib_info); |
| 169 | |
| 170 | if ((channel_mode = aacenc_channel_mode(format)) == 0) { |
| 171 | fprintf(stderr, "ERROR: unsupported channel layout\n"); |
| 172 | goto FAIL; |
| 173 | } |
| 174 | if (aacEncOpen(encoder, 0, 0) != AACENC_OK) { |
| 175 | fprintf(stderr, "ERROR: aacEncOpen() failed\n"); |
| 176 | goto FAIL; |
| 177 | } |
| 178 | aot = (params->profile ? params->profile : AOT_AAC_LC); |
| 179 | if (aacEncoder_SetParam(*encoder, AACENC_AOT, aot) != AACENC_OK) { |
| 180 | fprintf(stderr, "ERROR: unsupported profile\n"); |
| 181 | goto FAIL; |
| 182 | } |
| 183 | if (params->bitrate_mode == 0) |
| 184 | aacEncoder_SetParam(*encoder, AACENC_BITRATE, params->bitrate); |
| 185 | else if (aacEncoder_SetParam(*encoder, AACENC_BITRATEMODE, |
| 186 | params->bitrate_mode) != AACENC_OK) { |
| 187 | fprintf(stderr, "ERROR: unsupported bitrate mode\n"); |
| 188 | goto FAIL; |
| 189 | } |
| 190 | if (aacEncoder_SetParam(*encoder, AACENC_SAMPLERATE, |
| 191 | format->sample_rate) != AACENC_OK) { |
| 192 | fprintf(stderr, "ERROR: unsupported sample rate\n"); |
| 193 | goto FAIL; |
| 194 | } |
| 195 | if (aacEncoder_SetParam(*encoder, AACENC_CHANNELMODE, |
| 196 | channel_mode) != AACENC_OK) { |
| 197 | fprintf(stderr, "ERROR: unsupported channel mode\n"); |
| 198 | goto FAIL; |
| 199 | } |
| 200 | aacEncoder_SetParam(*encoder, AACENC_BANDWIDTH, params->bandwidth); |
| 201 | aacEncoder_SetParam(*encoder, AACENC_CHANNELORDER, 1); |
| 202 | aacEncoder_SetParam(*encoder, AACENC_AFTERBURNER, !!params->afterburner); |
| 203 | |
| 204 | aacEncoder_SetParam(*encoder, AACENC_SBR_MODE, params->lowdelay_sbr); |
| 205 | |
| 206 | #if AACENCODER_LIB_VL0 > 3 || (AACENCODER_LIB_VL0==3 && AACENCODER_LIB_VL1>=4) |
| 207 | if (lib_info.version > 0x03040000) |
| 208 | aacEncoder_SetParam(*encoder, AACENC_SBR_RATIO, params->sbr_ratio); |
| 209 | #endif |
| 210 | |
| 211 | if (aacEncoder_SetParam(*encoder, AACENC_TRANSMUX, |
| 212 | params->transport_format) != AACENC_OK) { |
| 213 | fprintf(stderr, "ERROR: unsupported transport format\n"); |
| 214 | goto FAIL; |
| 215 | } |
| 216 | if (aacEncoder_SetParam(*encoder, AACENC_SIGNALING_MODE, |
| 217 | params->sbr_signaling) != AACENC_OK) { |
| 218 | fprintf(stderr, "ERROR: failed to set SBR signaling mode\n"); |
| 219 | goto FAIL; |
| 220 | } |
| 221 | if (params->adts_crc_check) |
| 222 | aacEncoder_SetParam(*encoder, AACENC_PROTECTION, 1); |
| 223 | if (params->header_period) |
| 224 | aacEncoder_SetParam(*encoder, AACENC_HEADER_PERIOD, |
| 225 | params->header_period); |
| 226 | |
| 227 | if (aacEncEncode(*encoder, 0, 0, 0, 0) != AACENC_OK) { |
| 228 | fprintf(stderr, "ERROR: encoder initialization failed\n"); |
| 229 | goto FAIL; |
| 230 | } |
| 231 | if (aacEncInfo(*encoder, info) != AACENC_OK) { |
| 232 | fprintf(stderr, "ERROR: cannot retrieve encoder info\n"); |
| 233 | goto FAIL; |
| 234 | } |
| 235 | return 0; |
| 236 | FAIL: |
| 237 | if (encoder) |
| 238 | aacEncClose(encoder); |
| 239 | return -1; |
| 240 | } |
| 241 | |
| 242 | int aac_encode_frame(HANDLE_AACENCODER encoder, |
| 243 | const pcm_sample_description_t *format, |
| 244 | const int16_t *input, unsigned iframes, |
| 245 | aacenc_frame_t *output) |
| 246 | { |
| 247 | uint32_t ilen = iframes * format->channels_per_frame; |
| 248 | AACENC_BufDesc ibdesc = { 0 }, obdesc = { 0 }; |
| 249 | AACENC_InArgs iargs = { 0 }; |
| 250 | AACENC_OutArgs oargs = { 0 }; |
| 251 | void *ibufs[] = { (void*)input }; |
| 252 | void *obufs[1]; |
| 253 | INT ibuf_ids[] = { IN_AUDIO_DATA }; |
| 254 | INT obuf_ids[] = { OUT_BITSTREAM_DATA }; |
| 255 | INT ibuf_sizes[] = { ilen * sizeof(int16_t) }; |
| 256 | INT obuf_sizes[1]; |
| 257 | INT ibuf_el_sizes[] = { sizeof(int16_t) }; |
| 258 | INT obuf_el_sizes[] = { 1 }; |
| 259 | AACENC_ERROR err; |
| 260 | unsigned channel_mode, obytes; |
| 261 | |
| 262 | channel_mode = aacEncoder_GetParam(encoder, AACENC_CHANNELMODE); |
| 263 | obytes = 6144 / 8 * channel_mode; |
| 264 | if (!output->data || output->capacity < obytes) { |
| 265 | uint8_t *p = realloc(output->data, obytes); |
| 266 | if (!p) return -1; |
| 267 | output->capacity = obytes; |
| 268 | output->data = p; |
| 269 | } |
| 270 | obufs[0] = output->data; |
| 271 | obuf_sizes[0] = obytes; |
| 272 | |
| 273 | iargs.numInSamples = ilen ? ilen : -1; /* -1 for signaling EOF */ |
| 274 | ibdesc.numBufs = 1; |
| 275 | ibdesc.bufs = ibufs; |
| 276 | ibdesc.bufferIdentifiers = ibuf_ids; |
| 277 | ibdesc.bufSizes = ibuf_sizes; |
| 278 | ibdesc.bufElSizes = ibuf_el_sizes; |
| 279 | obdesc.numBufs = 1; |
| 280 | obdesc.bufs = obufs; |
| 281 | obdesc.bufferIdentifiers = obuf_ids; |
| 282 | obdesc.bufSizes = obuf_sizes; |
| 283 | obdesc.bufElSizes = obuf_el_sizes; |
| 284 | |
| 285 | err = aacEncEncode(encoder, &ibdesc, &obdesc, &iargs, &oargs); |
| 286 | if (err != AACENC_ENCODE_EOF && err != AACENC_OK) { |
| 287 | fprintf(stderr, "ERROR: aacEncEncode() failed\n"); |
| 288 | return -1; |
| 289 | } |
| 290 | output->size = oargs.numOutBytes; |
| 291 | return oargs.numInSamples / format->channels_per_frame; |
| 292 | } |