diff options
Diffstat (limited to 'libmpcodecs/ad_libmad.c')
| -rw-r--r-- | libmpcodecs/ad_libmad.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/libmpcodecs/ad_libmad.c b/libmpcodecs/ad_libmad.c deleted file mode 100644 index 81475374e1..0000000000 --- a/libmpcodecs/ad_libmad.c +++ /dev/null @@ -1,187 +0,0 @@ -/* - * This file is part of MPlayer. - * - * MPlayer is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * MPlayer is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with MPlayer; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> - -#include "config.h" - -#include "ad_internal.h" - -static const ad_info_t info = { - "libmad mpeg audio decoder", - "libmad", - "A'rpi", - "libmad...", - "based on Xine's libmad/xine_decoder.c" -}; - -LIBAD_EXTERN(libmad) - -#include <mad.h> - -typedef struct mad_decoder_s { - - struct mad_synth synth; - struct mad_stream stream; - struct mad_frame frame; - - int have_frame; - - int output_sampling_rate; - int output_open; - int output_mode; - -} mad_decoder_t; - -static int preinit(sh_audio_t *sh){ - - mad_decoder_t *this = calloc(1, sizeof(mad_decoder_t)); - sh->context = this; - - mad_synth_init (&this->synth); - mad_stream_init (&this->stream); - mad_frame_init (&this->frame); - - sh->audio_out_minsize=2*4608; - sh->audio_in_minsize=4096; - - return 1; -} - -static int read_frame(sh_audio_t *sh){ - mad_decoder_t *this = sh->context; - int len; - -while((len=demux_read_data(sh->ds,&sh->a_in_buffer[sh->a_in_buffer_len], - sh->a_in_buffer_size-sh->a_in_buffer_len))>0){ - sh->a_in_buffer_len+=len; - while(1){ - int ret; - mad_stream_buffer (&this->stream, sh->a_in_buffer, sh->a_in_buffer_len); - ret=mad_frame_decode (&this->frame, &this->stream); - if (this->stream.next_frame) { - int num_bytes = - (char*)sh->a_in_buffer+sh->a_in_buffer_len - (char*)this->stream.next_frame; - memmove(sh->a_in_buffer, this->stream.next_frame, num_bytes); - mp_msg(MSGT_DECAUDIO,MSGL_DBG2,"libmad: %d bytes processed\n",sh->a_in_buffer_len-num_bytes); - sh->a_in_buffer_len = num_bytes; - } - if (ret == 0) return 1; // OK!!! - // error! try to resync! - if(this->stream.error==MAD_ERROR_BUFLEN) break; - } -} -mp_msg(MSGT_DECAUDIO,MSGL_INFO,"Cannot sync MAD frame\n"); -return 0; -} - -static int init(sh_audio_t *sh){ - mad_decoder_t *this = sh->context; - - this->have_frame=read_frame(sh); - if(!this->have_frame) return 0; // failed to sync... - - sh->channels=(this->frame.header.mode == MAD_MODE_SINGLE_CHANNEL) ? 1 : 2; - sh->samplerate=this->frame.header.samplerate; - if (sh->i_bps < 1) - sh->i_bps=this->frame.header.bitrate/8; - sh->samplesize=2; - - return 1; -} - -static void uninit(sh_audio_t *sh){ - mad_decoder_t *this = sh->context; - mad_synth_finish (&this->synth); - mad_frame_finish (&this->frame); - mad_stream_finish(&this->stream); - free(sh->context); -} - -/* utility to scale and round samples to 16 bits */ -static inline signed int scale(mad_fixed_t sample) { - /* round */ - sample += (1L << (MAD_F_FRACBITS - 16)); - - /* clip */ - if (sample >= MAD_F_ONE) - sample = MAD_F_ONE - 1; - else if (sample < -MAD_F_ONE) - sample = -MAD_F_ONE; - - /* quantize */ - return sample >> (MAD_F_FRACBITS + 1 - 16); -} - -static int decode_audio(sh_audio_t *sh,unsigned char *buf,int minlen,int maxlen){ - mad_decoder_t *this = sh->context; - int len=0; - - while(len<minlen && len+4608<=maxlen){ - if(!this->have_frame) this->have_frame=read_frame(sh); - if(!this->have_frame) break; // failed to sync... or EOF - this->have_frame=0; - - mad_synth_frame (&this->synth, &this->frame); - - { unsigned int nchannels, nsamples; - mad_fixed_t const *left_ch, *right_ch; - struct mad_pcm *pcm = &this->synth.pcm; - uint16_t *output = (uint16_t*) buf; - - nchannels = pcm->channels; - nsamples = pcm->length; - left_ch = pcm->samples[0]; - right_ch = pcm->samples[1]; - - len+=2*nchannels*nsamples; - buf+=2*nchannels*nsamples; - - while (nsamples--) { - /* output sample(s) in 16-bit signed little-endian PCM */ - - *output++ = scale(*left_ch++); - - if (nchannels == 2) - *output++ = scale(*right_ch++); - - } - } - } - - return len?len:-1; -} - -static int control(sh_audio_t *sh,int cmd,void* arg, ...){ - mad_decoder_t *this = sh->context; - // various optional functions you MAY implement: - switch(cmd){ - case ADCTRL_RESYNC_STREAM: - this->have_frame=0; - mad_synth_init (&this->synth); - mad_stream_init (&this->stream); - mad_frame_init (&this->frame); - return CONTROL_TRUE; - case ADCTRL_SKIP_FRAME: - this->have_frame=read_frame(sh); - return CONTROL_TRUE; - } - return CONTROL_UNKNOWN; -} |