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48e2f01c | 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> | |
9b8f9915 | 13 | #include <string.h> |
48e2f01c | 14 | #include "aacenc.h" |
15 | ||
e1adc178 | 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 | ||
48e2f01c | 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 | ||
e1adc178 | 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 | ||
9b8f9915 | 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]; | |
e1adc178 | 91 | unsigned shift = aacenc_is_dual_rate_sbr(params); |
9b8f9915 | 92 | |
93 | switch (params->profile) { | |
94 | case AOT_SBR: | |
95 | case AOT_PS: | |
e1adc178 | 96 | if (!shift) |
97 | break; | |
9b8f9915 | 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 */ | |
e1adc178 | 109 | outasc[ascsize+2] |= sampling_freq_index(asc_sfreq << shift) << 3; |
9b8f9915 | 110 | if (params->profile == AOT_SBR) { |
111 | *outsize = ascsize + 3; | |
e1adc178 | 112 | return 0; |
9b8f9915 | 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; | |
e1adc178 | 122 | return 0; |
9b8f9915 | 123 | } |
e1adc178 | 124 | if (*outsize < ascsize) |
125 | return -1; | |
126 | memcpy(outasc, asc, ascsize); | |
127 | *outsize = ascsize; | |
9b8f9915 | 128 | return 0; |
129 | } | |
130 | ||
48e2f01c | 131 | static |
132 | int aacenc_channel_mode(const pcm_sample_description_t *format) | |
133 | { | |
134 | uint32_t chanmask = format->channel_mask; | |
135 | ||
3c0f152d | 136 | if (format->channels_per_frame > 8) |
48e2f01c | 137 | return 0; |
138 | if (!chanmask) { | |
3c0f152d | 139 | static uint32_t defaults[] = { 0x4, 0x3, 0x7, 0, 0x37, 0x3f, 0, 0x63f }; |
48e2f01c | 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; | |
3c0f152d | 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 | |
48e2f01c | 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; | |
e1adc178 | 165 | LIB_INFO lib_info; |
48e2f01c | 166 | |
167 | *encoder = 0; | |
e1adc178 | 168 | aacenc_get_lib_info(&lib_info); |
169 | ||
48e2f01c | 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 | } | |
e1adc178 | 195 | if (aacEncoder_SetParam(*encoder, AACENC_CHANNELMODE, |
196 | channel_mode) != AACENC_OK) { | |
197 | fprintf(stderr, "ERROR: unsupported channel mode\n"); | |
198 | goto FAIL; | |
199 | } | |
48e2f01c | 200 | aacEncoder_SetParam(*encoder, AACENC_BANDWIDTH, params->bandwidth); |
201 | aacEncoder_SetParam(*encoder, AACENC_CHANNELORDER, 1); | |
202 | aacEncoder_SetParam(*encoder, AACENC_AFTERBURNER, !!params->afterburner); | |
203 | ||
e1adc178 | 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 | |
48e2f01c | 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) { | |
f5363b23 | 218 | fprintf(stderr, "ERROR: failed to set SBR signaling mode\n"); |
48e2f01c | 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, | |
d533c8e0 | 245 | aacenc_frame_t *output) |
48e2f01c | 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); | |
3b518efd | 263 | obytes = 6144 / 8 * channel_mode; |
d533c8e0 | 264 | if (!output->data || output->capacity < obytes) { |
3b518efd | 265 | uint8_t *p = realloc(output->data, obytes); |
266 | if (!p) return -1; | |
d533c8e0 | 267 | output->capacity = obytes; |
3b518efd | 268 | output->data = p; |
48e2f01c | 269 | } |
3b518efd | 270 | obufs[0] = output->data; |
48e2f01c | 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 | } | |
d533c8e0 | 290 | output->size = oargs.numOutBytes; |
4d48b091 | 291 | return oargs.numInSamples / format->channels_per_frame; |
48e2f01c | 292 | } |