libmpcodecs/ad_ffmpeg.c

   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 <unistd.h>
  22
  23 #include "config.h"
  24 #include "mp_msg.h"
  25 #include "help_mp.h"
  26
  27 #include "ad_internal.h"
  28 #include "libaf/reorder_ch.h"
  29
  30 #include "mpbswap.h"
  31
  32 static const ad_info_t info =
  33 {
  34         "FFmpeg/libavcodec audio decoders",
  35         "ffmpeg",
  36         "Nick Kurshev",
  37         "ffmpeg.sf.net",
  38         ""
  39 };
  40
  41 LIBAD_EXTERN(ffmpeg)
  42
  43 #define assert(x)
  44
  45 #include "libavcodec/avcodec.h"
  46
  47 extern int avcodec_initialized;
  48
  49 static int preinit(sh_audio_t *sh)
  50 {
  51   sh->audio_out_minsize=AVCODEC_MAX_AUDIO_FRAME_SIZE;
  52   return 1;
  53 }
  54
  55 static int init(sh_audio_t *sh_audio)
  56 {
  57     int tries = 0;
  58     int x;
  59     AVCodecContext *lavc_context;
  60     AVCodec *lavc_codec;
  61
  62     mp_msg(MSGT_DECAUDIO,MSGL_V,"FFmpeg's libavcodec audio codec\n");
  63     if(!avcodec_initialized){
  64       avcodec_init();
  65       avcodec_register_all();
  66       avcodec_initialized=1;
  67     }
  68
  69     lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh_audio->codec->dll);
  70     if(!lavc_codec){
  71         mp_tmsg(MSGT_DECAUDIO,MSGL_ERR,"Cannot find codec '%s' in libavcodec...\n",sh_audio->codec->dll);
  72         return 0;
  73     }
  74
  75     lavc_context = avcodec_alloc_context();
  76     sh_audio->context=lavc_context;
  77
  78     lavc_context->sample_rate = sh_audio->samplerate;
  79     lavc_context->bit_rate = sh_audio->i_bps * 8;
  80     if(sh_audio->wf){
  81         lavc_context->channels = sh_audio->wf->nChannels;
  82         lavc_context->sample_rate = sh_audio->wf->nSamplesPerSec;
  83         lavc_context->bit_rate = sh_audio->wf->nAvgBytesPerSec * 8;
  84         lavc_context->block_align = sh_audio->wf->nBlockAlign;
  85         lavc_context->bits_per_coded_sample = sh_audio->wf->wBitsPerSample;
  86     }
  87     lavc_context->request_channels = audio_output_channels;
  88     lavc_context->codec_tag = sh_audio->format; //FOURCC
  89     lavc_context->codec_type = CODEC_TYPE_AUDIO;
  90     lavc_context->codec_id = lavc_codec->id; // not sure if required, imho not --A'rpi
  91
  92     /* alloc extra data */
  93     if (sh_audio->wf && sh_audio->wf->cbSize > 0) {
  94         lavc_context->extradata = av_mallocz(sh_audio->wf->cbSize + FF_INPUT_BUFFER_PADDING_SIZE);
  95         lavc_context->extradata_size = sh_audio->wf->cbSize;
  96         memcpy(lavc_context->extradata, (char *)sh_audio->wf + sizeof(WAVEFORMATEX),
  97                lavc_context->extradata_size);
  98     }
  99
 100     // for QDM2
 101     if (sh_audio->codecdata_len && sh_audio->codecdata && !lavc_context->extradata)
 102     {
 103         lavc_context->extradata = av_malloc(sh_audio->codecdata_len);
 104         lavc_context->extradata_size = sh_audio->codecdata_len;
 105         memcpy(lavc_context->extradata, (char *)sh_audio->codecdata,
 106                lavc_context->extradata_size);
 107     }
 108
 109     /* open it */
 110     if (avcodec_open(lavc_context, lavc_codec) < 0) {
 111         mp_tmsg(MSGT_DECAUDIO,MSGL_ERR, "Could not open codec.\n");
 112         return 0;
 113     }
 114    mp_msg(MSGT_DECAUDIO,MSGL_V,"INFO: libavcodec \"%s\" init OK!\n", lavc_codec->name);
 115
 116 //   printf("\nFOURCC: 0x%X\n",sh_audio->format);
 117    if(sh_audio->format==0x3343414D){
 118        // MACE 3:1
 119        sh_audio->ds->ss_div = 2*3; // 1 samples/packet
 120        sh_audio->ds->ss_mul = 2*sh_audio->wf->nChannels; // 1 byte*ch/packet
 121    } else
 122    if(sh_audio->format==0x3643414D){
 123        // MACE 6:1
 124        sh_audio->ds->ss_div = 2*6; // 1 samples/packet
 125        sh_audio->ds->ss_mul = 2*sh_audio->wf->nChannels; // 1 byte*ch/packet
 126    }
 127
 128    // Decode at least 1 byte:  (to get header filled)
 129    do {
 130        x=decode_audio(sh_audio,sh_audio->a_buffer,1,sh_audio->a_buffer_size);
 131    } while (x <= 0 && tries++ < 5);
 132    if(x>0) sh_audio->a_buffer_len=x;
 133
 134   sh_audio->channels=lavc_context->channels;
 135   sh_audio->samplerate=lavc_context->sample_rate;
 136   sh_audio->i_bps=lavc_context->bit_rate/8;
 137   switch (lavc_context->sample_fmt) {
 138       case SAMPLE_FMT_U8:  sh_audio->sample_format = AF_FORMAT_U8;       break;
 139       case SAMPLE_FMT_S16: sh_audio->sample_format = AF_FORMAT_S16_NE;   break;
 140       case SAMPLE_FMT_S32: sh_audio->sample_format = AF_FORMAT_S32_NE;   break;
 141       case SAMPLE_FMT_FLT: sh_audio->sample_format = AF_FORMAT_FLOAT_NE; break;
 142       default:
 143           mp_msg(MSGT_DECAUDIO, MSGL_FATAL, "Unsupported sample format\n");
 144           return 0;
 145   }
 146   if(sh_audio->wf){
 147       // If the decoder uses the wrong number of channels all is lost anyway.
 148       // sh_audio->channels=sh_audio->wf->nChannels;
 149       if (sh_audio->wf->nSamplesPerSec)
 150       sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
 151       if (sh_audio->wf->nAvgBytesPerSec)
 152       sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
 153   }
 154   sh_audio->samplesize=af_fmt2bits(sh_audio->sample_format)/ 8;
 155   return 1;
 156 }
 157
 158 static void uninit(sh_audio_t *sh)
 159 {
 160     AVCodecContext *lavc_context = sh->context;
 161
 162     if (avcodec_close(lavc_context) < 0)
 163         mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not close codec.\n");
 164     av_freep(&lavc_context->extradata);
 165     av_freep(&lavc_context);
 166 }
 167
 168 static int control(sh_audio_t *sh,int cmd,void* arg, ...)
 169 {
 170     AVCodecContext *lavc_context = sh->context;
 171     switch(cmd){
 172     case ADCTRL_RESYNC_STREAM:
 173         avcodec_flush_buffers(lavc_context);
 174         ds_clear_parser(sh->ds);
 175     return CONTROL_TRUE;
 176     }
 177     return CONTROL_UNKNOWN;
 178 }
 179
 180 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
 181 {
 182     unsigned char *start=NULL;
 183     int y,len=-1;
 184     while(len<minlen){
 185         AVPacket pkt;
 186         int len2=maxlen;
 187         double pts;
 188         int x=ds_get_packet_pts(sh_audio->ds,&start, &pts);
 189         if(x<=0) {
 190             start = NULL;
 191             x = 0;
 192             ds_parse(sh_audio->ds, &start, &x, MP_NOPTS_VALUE, 0);
 193             if (x <= 0)
 194                 break; // error
 195         } else {
 196             int in_size = x;
 197             int consumed = ds_parse(sh_audio->ds, &start, &x, pts, 0);
 198             sh_audio->ds->buffer_pos -= in_size - consumed;
 199         }
 200         av_init_packet(&pkt);
 201         pkt.data = start;
 202         pkt.size = x;
 203         if (pts != MP_NOPTS_VALUE) {
 204             sh_audio->pts = pts;
 205             sh_audio->pts_bytes = 0;
 206         }
 207         y=avcodec_decode_audio3(sh_audio->context,(int16_t*)buf,&len2,&pkt);
 208 //printf("return:%d samples_out:%d bitstream_in:%d sample_sum:%d\n", y, len2, x, len); fflush(stdout);
 209         if(y<0){ mp_msg(MSGT_DECAUDIO,MSGL_V,"lavc_audio: error\n");break; }
 210         if(!sh_audio->parser && y<x)
 211             sh_audio->ds->buffer_pos+=y-x;  // put back data (HACK!)
 212         if(len2>0){
 213           if (((AVCodecContext *)sh_audio->context)->channels >= 5) {
 214             int samplesize = av_get_bits_per_sample_format(((AVCodecContext *)
 215                                     sh_audio->context)->sample_fmt) / 8;
 216             reorder_channel_nch(buf, AF_CHANNEL_LAYOUT_LAVC_DEFAULT,
 217                                 AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 218                                 ((AVCodecContext *)sh_audio->context)->channels,
 219                                 len2 / samplesize, samplesize);
 220           }
 221           //len=len2;break;
 222           if(len<0) len=len2; else len+=len2;
 223           buf+=len2;
 224           maxlen -= len2;
 225           sh_audio->pts_bytes += len2;
 226         }
 227         mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"Decoded %d -> %d  \n",y,len2);
 228     }
 229   return len;
 230 }