1 /*
2 * This file is part of MPlayer.
3 *
4 * MPlayer is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * MPlayer is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <inttypes.h>
22 #include <unistd.h>
23 #include <string.h>
24 #include <sys/types.h>
25 #include <twolame.h>
26
27 #include "libavutil/avstring.h"
28 #include "m_option.h"
29 #include "mp_msg.h"
30 #include "libmpdemux/aviheader.h"
31 #include "libaf/af_format.h"
32 #include "libmpdemux/ms_hdr.h"
33 #include "stream/stream.h"
34 #include "libmpdemux/muxer.h"
35 #include "ae_twolame.h"
36 #include "libmpdemux/mp3_hdr.h"
37
38
39 typedef struct {
40 twolame_options *twolame_ctx;
41 int vbr;
42 } mpae_twolame_ctx;
43
44 static int
45 param_bitrate = 192,
46 param_psy = 3,
47 param_maxvbr = 0,
48 param_errprot = 0,
49 param_debug = 0;
50
51 static float param_vbr = 0;
52 static char *param_mode = "stereo";
53
54 const m_option_t twolameopts_conf[] = {
55 {"br", ¶m_bitrate, CONF_TYPE_INT, 0, 0, 0, NULL},
56 {"mode", ¶m_mode, CONF_TYPE_STRING, 0, 0, 0, NULL},
57 {"psy", ¶m_psy, CONF_TYPE_INT, CONF_RANGE, -1, 4, NULL},
58 {"vbr", ¶m_vbr, CONF_TYPE_FLOAT, CONF_RANGE, -50, 50, NULL},
59 {"maxvbr", ¶m_maxvbr, CONF_TYPE_INT, 0, 0, 0, NULL},
60 {"errprot", ¶m_errprot, CONF_TYPE_INT, CONF_RANGE, 0, 1, NULL},
61 {"debug", ¶m_debug, CONF_TYPE_INT, CONF_RANGE, 0, 100000000, NULL},
62 {NULL, NULL, 0, 0, 0, 0, NULL}
63 };
64
65
bind_twolame(audio_encoder_t * encoder,muxer_stream_t * mux_a)66 static int bind_twolame(audio_encoder_t *encoder, muxer_stream_t *mux_a)
67 {
68 mpae_twolame_ctx *ctx = encoder->priv;
69
70 mux_a->wf = malloc(sizeof(*mux_a->wf)+256);
71 mux_a->wf->wFormatTag = 0x50;
72 mux_a->wf->nChannels = encoder->params.channels;
73 mux_a->wf->nSamplesPerSec = encoder->params.sample_rate;
74 mux_a->wf->nAvgBytesPerSec = encoder->params.bitrate / 8;
75
76 if(ctx->vbr || ((mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame) % mux_a->wf->nSamplesPerSec))
77 {
78 mux_a->h.dwScale = encoder->params.samples_per_frame;
79 mux_a->h.dwRate = encoder->params.sample_rate;
80 mux_a->h.dwSampleSize = 0; // Blocksize not constant
81 }
82 else
83 {
84 mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * encoder->params.samples_per_frame)/ mux_a->wf->nSamplesPerSec; /* for cbr */
85 mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
86 mux_a->h.dwSampleSize = mux_a->h.dwScale;
87 }
88 mux_a->wf->nBlockAlign = mux_a->h.dwScale;
89 mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
90 mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
91
92 mux_a->wf->cbSize = 0; //12;
93 mux_a->wf->wBitsPerSample = 0; /* does not apply */
94 ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
95 ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
96 ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
97 ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
98 ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
99
100 // Fix allocation
101 mux_a->wf = realloc(mux_a->wf, sizeof(*mux_a->wf)+mux_a->wf->cbSize);
102
103 encoder->input_format = AF_FORMAT_S16_NE;
104 encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
105 encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
106
107 return 1;
108 }
109
encode_twolame(audio_encoder_t * encoder,uint8_t * dest,void * src,int len,int max_size)110 static int encode_twolame(audio_encoder_t *encoder, uint8_t *dest, void *src, int len, int max_size)
111 {
112 mpae_twolame_ctx *ctx = encoder->priv;
113 int ret_size = 0, r2;
114
115 if (!src)
116 return twolame_encode_flush(ctx->twolame_ctx, dest, max_size);
117
118 len /= (2*encoder->params.channels);
119 ret_size = twolame_encode_buffer_interleaved(ctx->twolame_ctx, src, len, dest, max_size);
120 r2 = mp_decode_mp3_header(dest);
121 mp_msg(MSGT_MENCODER, MSGL_DBG2, "\nSIZE: %d, max: %d, r2: %d\n", ret_size, max_size, r2);
122 if(r2 > 0)
123 ret_size = r2;
124 return ret_size;
125 }
126
close_twolame(audio_encoder_t * encoder)127 static int close_twolame(audio_encoder_t *encoder)
128 {
129 free(encoder->priv);
130 return 1;
131 }
132
get_frame_size(audio_encoder_t * encoder)133 static int get_frame_size(audio_encoder_t *encoder)
134 {
135 int sz;
136 if(encoder->stream->buffer_len < 4)
137 return 0;
138 sz = mp_decode_mp3_header(encoder->stream->buffer);
139 if(sz <= 0)
140 return 0;
141 return sz;
142 }
143
144
mpae_init_twolame(audio_encoder_t * encoder)145 int mpae_init_twolame(audio_encoder_t *encoder)
146 {
147 int mode;
148 mpae_twolame_ctx *ctx = NULL;
149
150 if(encoder->params.channels == 1)
151 {
152 mp_msg(MSGT_MENCODER, MSGL_INFO, "ae_twolame, 1 audio channel, forcing mono mode\n");
153 mode = TWOLAME_MONO;
154 }
155 else if(encoder->params.channels == 2)
156 {
157 if(! av_strcasecmp(param_mode, "dual"))
158 mode = TWOLAME_DUAL_CHANNEL;
159 else if(! av_strcasecmp(param_mode, "jstereo"))
160 mode = TWOLAME_JOINT_STEREO;
161 else if(! av_strcasecmp(param_mode, "stereo"))
162 mode = TWOLAME_STEREO;
163 else
164 {
165 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, unknown mode %s, exiting\n", param_mode);
166 goto err_out;
167 }
168 }
169 else
170 {
171 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, Twolame can't encode > 2 channels, exiting\n");
172 goto err_out;
173 }
174
175 ctx = calloc(1, sizeof(*ctx));
176 if(ctx == NULL)
177 {
178 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't alloc context, exiting\n");
179 goto err_out;
180 }
181
182 ctx->twolame_ctx = twolame_init();
183 if(ctx->twolame_ctx == NULL)
184 {
185 mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't initial parameters from libtwolame, exiting\n");
186 goto err_out;
187 }
188 ctx->vbr = 0;
189
190 if(twolame_set_num_channels(ctx->twolame_ctx, encoder->params.channels) != 0 ||
191 twolame_set_mode(ctx->twolame_ctx, mode) != 0 ||
192 twolame_set_in_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0 ||
193 twolame_set_out_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
194 goto err_out;
195
196 if(encoder->params.sample_rate < 32000)
197 twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG2);
198 else
199 twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG1);
200
201 if(twolame_set_psymodel(ctx->twolame_ctx, param_psy) != 0 ||
202 twolame_set_bitrate(ctx->twolame_ctx, param_bitrate) != 0)
203 goto err_out;
204
205 if(param_errprot)
206 if(twolame_set_error_protection(ctx->twolame_ctx, TRUE) != 0)
207 goto err_out;
208
209 if(param_vbr != 0)
210 {
211 if(twolame_set_VBR(ctx->twolame_ctx, TRUE) != 0 ||
212 twolame_set_VBR_q(ctx->twolame_ctx, param_vbr) != 0 ||
213 twolame_set_padding(ctx->twolame_ctx, FALSE) != 0)
214 goto err_out;
215 if(param_maxvbr)
216 {
217 if(twolame_set_VBR_max_bitrate_kbps(ctx->twolame_ctx, param_maxvbr) != 0)
218 goto err_out;
219 }
220 ctx->vbr = 1;
221 }
222
223 if(twolame_set_verbosity(ctx->twolame_ctx, param_debug) != 0 ||
224 twolame_init_params(ctx->twolame_ctx) != 0)
225 goto err_out;
226
227 encoder->params.bitrate = param_bitrate * 1000;
228 encoder->params.samples_per_frame = 1152;
229 encoder->priv = ctx;
230 encoder->decode_buffer_size = 1152 * 2 * encoder->params.channels;
231
232 encoder->bind = bind_twolame;
233 encoder->get_frame_size = get_frame_size;
234 encoder->encode = encode_twolame;
235 encoder->close = close_twolame;
236
237 return 1;
238
239 err_out:
240 free(ctx);
241 return 0;
242 }
243