1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include "m_option.h"
#include "mp_msg.h"
#include "aviheader.h"
#include "libaf/af_format.h"
#include "ms_hdr.h"
#include "muxer.h"
#include "ae_twolame.h"
#include "libmpdemux/mp3_hdr.h"
static int
param_bitrate = 192,
param_psy = 3,
param_maxvbr = 0,
param_errprot = 0,
param_debug = 0;
static float param_vbr = 0;
static char *param_mode = "stereo";
m_option_t twolameopts_conf[] = {
{"br", ¶m_bitrate, CONF_TYPE_INT, 0, 0, 0, NULL},
{"mode", ¶m_mode, CONF_TYPE_STRING, 0, 0, 0, NULL},
{"psy", ¶m_psy, CONF_TYPE_INT, CONF_RANGE, -1, 4, NULL},
{"vbr", ¶m_vbr, CONF_TYPE_FLOAT, CONF_RANGE, -50, 50, NULL},
{"maxvbr", ¶m_maxvbr, CONF_TYPE_INT, 0, 0, 0, NULL},
{"errprot", ¶m_errprot, CONF_TYPE_INT, CONF_RANGE, 0, 1, NULL},
{"debug", ¶m_debug, CONF_TYPE_INT, CONF_RANGE, 0, 100000000, NULL},
{NULL, NULL, 0, 0, 0, 0, NULL}
};
static int bind_twolame(audio_encoder_t *encoder, muxer_stream_t *mux_a)
{
mpae_twolame_ctx *ctx = (mpae_twolame_ctx *) encoder->priv;
mux_a->wf = malloc(sizeof(WAVEFORMATEX)+256);
mux_a->wf->wFormatTag = 0x50;
mux_a->wf->nChannels = encoder->params.channels;
mux_a->wf->nSamplesPerSec = encoder->params.sample_rate;
mux_a->wf->nAvgBytesPerSec = encoder->params.bitrate / 8;
if(ctx->vbr || ((mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame) % mux_a->wf->nSamplesPerSec))
{
mux_a->h.dwScale = encoder->params.samples_per_frame;
mux_a->h.dwRate = encoder->params.sample_rate;
mux_a->h.dwSampleSize = 0; // Blocksize not constant
}
else
{
mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame)/ mux_a->wf->nSamplesPerSec; /* for cbr */
mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
mux_a->h.dwSampleSize = mux_a->h.dwScale;
}
mux_a->wf->nBlockAlign = mux_a->h.dwScale;
mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
mux_a->wf->cbSize = 0; //12;
mux_a->wf->wBitsPerSample = 0; /* does not apply */
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
// Fix allocation
mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
encoder->input_format = AF_FORMAT_S16_NE;
encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
return 1;
}
static int encode_twolame(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
{
mpae_twolame_ctx *ctx = (mpae_twolame_ctx *)encoder->priv;
int ret_size = 0, r2;
len /= (2*encoder->params.channels);
ret_size = twolame_encode_buffer_interleaved(ctx->twolame_ctx, src, len, dest, max_size);
r2 = mp_decode_mp3_header(dest);
mp_msg(MSGT_MENCODER, MSGL_DBG2, "\nSIZE: %d, max: %d, r2: %d\n", ret_size, max_size, r2);
if(r2 > 0)
ret_size = r2;
return ret_size;
}
int close_twolame(audio_encoder_t *encoder)
{
free(encoder->priv);
return 1;
}
static int get_frame_size(audio_encoder_t *encoder)
{
int sz;
if(encoder->stream->buffer_len < 4)
return 0;
sz = mp_decode_mp3_header(encoder->stream->buffer);
if(sz <= 0)
return 0;
return sz;
}
int mpae_init_twolame(audio_encoder_t *encoder)
{
int mode;
mpae_twolame_ctx *ctx = NULL;
if(encoder->params.channels == 1)
{
mp_msg(MSGT_MENCODER, MSGL_INFO, "ae_twolame, 1 audio channel, forcing mono mode\n");
mode = TWOLAME_MONO;
}
else if(encoder->params.channels == 2)
{
if(! strcasecmp(param_mode, "dual"))
mode = TWOLAME_DUAL_CHANNEL;
else if(! strcasecmp(param_mode, "jstereo"))
mode = TWOLAME_JOINT_STEREO;
else if(! strcasecmp(param_mode, "stereo"))
mode = TWOLAME_STEREO;
else
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, unknown mode %s, exiting\n", param_mode);
}
}
else
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, Twolame can't encode > 2 channels, exiting\n");
ctx = (mpae_twolame_ctx *) calloc(1, sizeof(mpae_twolame_ctx));
if(ctx == NULL)
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't alloc a %d bytes context, exiting\n", sizeof(mpae_twolame_ctx));
return 0;
}
ctx->twolame_ctx = twolame_init();
if(ctx->twolame_ctx == NULL)
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't initial parameters from libtwolame, exiting\n");
free(ctx);
return 0;
}
ctx->vbr = 0;
if(twolame_set_num_channels(ctx->twolame_ctx, encoder->params.channels) != 0)
return 0;
if(twolame_set_mode(ctx->twolame_ctx, mode) != 0)
return 0;
if(twolame_set_in_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
return 0;
if(twolame_set_out_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
return 0;
if(encoder->params.sample_rate < 32000)
twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG2);
else
twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG1);
if(twolame_set_psymodel(ctx->twolame_ctx, param_psy) != 0)
return 0;
if(twolame_set_bitrate(ctx->twolame_ctx, param_bitrate) != 0)
return 0;
if(param_errprot)
if(twolame_set_error_protection(ctx->twolame_ctx, TRUE) != 0)
return 0;
if(param_vbr != 0)
{
if(twolame_set_VBR(ctx->twolame_ctx, TRUE) != 0)
return 0;
if(twolame_set_VBR_q(ctx->twolame_ctx, param_vbr) != 0)
return 0;
if(twolame_set_padding(ctx->twolame_ctx, FALSE) != 0)
return 0;
if(param_maxvbr)
{
if(twolame_set_VBR_max_bitrate_kbps(ctx->twolame_ctx, param_maxvbr) != 0)
return 0;
}
ctx->vbr = 1;
}
if(twolame_set_verbosity(ctx->twolame_ctx, param_debug) != 0)
return 0;
if(twolame_init_params(ctx->twolame_ctx) != 0)
return 0;
encoder->params.bitrate = param_bitrate * 1000;
encoder->params.samples_per_frame = 1152;
encoder->priv = ctx;
encoder->decode_buffer_size = 1152 * 2 * encoder->params.channels;
encoder->bind = bind_twolame;
encoder->get_frame_size = get_frame_size;
encoder->encode = encode_twolame;
encoder->close = close_twolame;
return 1;
}
|
