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 "options.h"
  26
  27 #include "ad_internal.h"
  28 #include "vd_ffmpeg.h"
  29 #include "libaf/reorder_ch.h"
  30
  31 #include "mpbswap.h"
  32
  33 static const ad_info_t info =
  34 {
  35         "FFmpeg/libavcodec audio decoders",
  36         "ffmpeg",
  37         "Nick Kurshev",
  38         "ffmpeg.sf.net",
  39         ""
  40 };
  41
  42 LIBAD_EXTERN(ffmpeg)
  43
  44 #define assert(x)
  45
  46 #include "libavcodec/avcodec.h"
  47
  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 /* Prefer playing audio with the samplerate given in container data
  56  * if available, but take number the number of channels and sample format
  57  * from the codec, since if the codec isn't using the correct values for
  58  * those everything breaks anyway.
  59  */
  60 static int setup_format(sh_audio_t *sh_audio, const AVCodecContext *lavc_context)
  61 {
  62     int sample_format = sh_audio->sample_format;
  63     switch (lavc_context->sample_fmt) {
  64         case SAMPLE_FMT_U8:  sample_format = AF_FORMAT_U8;       break;
  65         case SAMPLE_FMT_S16: sample_format = AF_FORMAT_S16_NE;   break;
  66         case SAMPLE_FMT_S32: sample_format = AF_FORMAT_S32_NE;   break;
  67         case SAMPLE_FMT_FLT: sample_format = AF_FORMAT_FLOAT_NE; break;
  68         default:
  69             mp_msg(MSGT_DECAUDIO, MSGL_FATAL, "Unsupported sample format\n");
  70     }
  71
  72     bool broken_srate        = false;
  73     int samplerate           = lavc_context->sample_rate;
  74     int container_samplerate = sh_audio->container_out_samplerate;
  75     if (!container_samplerate && sh_audio->wf)
  76         container_samplerate = sh_audio->wf->nSamplesPerSec;
  77     if (lavc_context->codec_id == CODEC_ID_AAC
  78         && samplerate == 2 * container_samplerate)
  79         broken_srate = true;
  80     else if (container_samplerate)
  81         samplerate = container_samplerate;
  82
  83     if (lavc_context->channels != sh_audio->channels ||
  84         samplerate != sh_audio->samplerate ||
  85         sample_format != sh_audio->sample_format) {
  86         sh_audio->channels=lavc_context->channels;
  87         sh_audio->samplerate=samplerate;
  88         sh_audio->sample_format = sample_format;
  89         sh_audio->samplesize=af_fmt2bits(sh_audio->sample_format)/ 8;
  90         if (broken_srate)
  91             mp_msg(MSGT_DECAUDIO, MSGL_WARN,
  92                    "Ignoring broken container sample rate for AAC with SBR\n");
  93         return 1;
  94     }
  95     return 0;
  96 }
  97
  98 static int init(sh_audio_t *sh_audio)
  99 {
 100     struct MPOpts *opts = sh_audio->opts;
 101     int tries = 0;
 102     int x;
 103     AVCodecContext *lavc_context;
 104     AVCodec *lavc_codec;
 105
 106     mp_msg(MSGT_DECAUDIO,MSGL_V,"FFmpeg's libavcodec audio codec\n");
 107     init_avcodec();
 108
 109     lavc_codec = avcodec_find_decoder_by_name(sh_audio->codec->dll);
 110     if(!lavc_codec){
 111         mp_tmsg(MSGT_DECAUDIO,MSGL_ERR,"Cannot find codec '%s' in libavcodec...\n",sh_audio->codec->dll);
 112         return 0;
 113     }
 114
 115     lavc_context = avcodec_alloc_context();
 116     sh_audio->context=lavc_context;
 117
 118     lavc_context->drc_scale = opts->drc_level;
 119     lavc_context->sample_rate = sh_audio->samplerate;
 120     lavc_context->bit_rate = sh_audio->i_bps * 8;
 121     if(sh_audio->wf){
 122         lavc_context->channels = sh_audio->wf->nChannels;
 123         lavc_context->sample_rate = sh_audio->wf->nSamplesPerSec;
 124         lavc_context->bit_rate = sh_audio->wf->nAvgBytesPerSec * 8;
 125         lavc_context->block_align = sh_audio->wf->nBlockAlign;
 126         lavc_context->bits_per_coded_sample = sh_audio->wf->wBitsPerSample;
 127     }
 128     lavc_context->request_channels = opts->audio_output_channels;
 129     lavc_context->codec_tag = sh_audio->format; //FOURCC
 130     lavc_context->codec_type = CODEC_TYPE_AUDIO;
 131     lavc_context->codec_id = lavc_codec->id; // not sure if required, imho not --A'rpi
 132
 133     /* alloc extra data */
 134     if (sh_audio->wf && sh_audio->wf->cbSize > 0) {
 135         lavc_context->extradata = av_mallocz(sh_audio->wf->cbSize + FF_INPUT_BUFFER_PADDING_SIZE);
 136         lavc_context->extradata_size = sh_audio->wf->cbSize;
 137         memcpy(lavc_context->extradata, sh_audio->wf + 1,
 138                lavc_context->extradata_size);
 139     }
 140
 141     // for QDM2
 142     if (sh_audio->codecdata_len && sh_audio->codecdata && !lavc_context->extradata)
 143     {
 144         lavc_context->extradata = av_malloc(sh_audio->codecdata_len);
 145         lavc_context->extradata_size = sh_audio->codecdata_len;
 146         memcpy(lavc_context->extradata, (char *)sh_audio->codecdata,
 147                lavc_context->extradata_size);
 148     }
 149
 150     /* open it */
 151     if (avcodec_open(lavc_context, lavc_codec) < 0) {
 152         mp_tmsg(MSGT_DECAUDIO,MSGL_ERR, "Could not open codec.\n");
 153         return 0;
 154     }
 155    mp_msg(MSGT_DECAUDIO,MSGL_V,"INFO: libavcodec \"%s\" init OK!\n", lavc_codec->name);
 156
 157 //   printf("\nFOURCC: 0x%X\n",sh_audio->format);
 158    if(sh_audio->format==0x3343414D){
 159        // MACE 3:1
 160        sh_audio->ds->ss_div = 2*3; // 1 samples/packet
 161        sh_audio->ds->ss_mul = 2*sh_audio->wf->nChannels; // 1 byte*ch/packet
 162    } else
 163    if(sh_audio->format==0x3643414D){
 164        // MACE 6:1
 165        sh_audio->ds->ss_div = 2*6; // 1 samples/packet
 166        sh_audio->ds->ss_mul = 2*sh_audio->wf->nChannels; // 1 byte*ch/packet
 167    }
 168
 169    // Decode at least 1 byte:  (to get header filled)
 170    do {
 171        x=decode_audio(sh_audio,sh_audio->a_buffer,1,sh_audio->a_buffer_size);
 172    } while (x <= 0 && tries++ < 5);
 173    if(x>0) sh_audio->a_buffer_len=x;
 174
 175   sh_audio->i_bps=lavc_context->bit_rate/8;
 176   if (sh_audio->wf && sh_audio->wf->nAvgBytesPerSec)
 177       sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
 178
 179   switch (lavc_context->sample_fmt) {
 180       case SAMPLE_FMT_U8:
 181       case SAMPLE_FMT_S16:
 182       case SAMPLE_FMT_S32:
 183       case SAMPLE_FMT_FLT:
 184           break;
 185       default:
 186           return 0;
 187   }
 188   return 1;
 189 }
 190
 191 static void uninit(sh_audio_t *sh)
 192 {
 193     AVCodecContext *lavc_context = sh->context;
 194
 195     if (avcodec_close(lavc_context) < 0)
 196         mp_tmsg(MSGT_DECVIDEO, MSGL_ERR, "Could not close codec.\n");
 197     av_freep(&lavc_context->extradata);
 198     av_freep(&lavc_context);
 199 }
 200
 201 static int control(sh_audio_t *sh,int cmd,void* arg, ...)
 202 {
 203     AVCodecContext *lavc_context = sh->context;
 204     switch(cmd){
 205     case ADCTRL_RESYNC_STREAM:
 206         avcodec_flush_buffers(lavc_context);
 207         ds_clear_parser(sh->ds);
 208     return CONTROL_TRUE;
 209     }
 210     return CONTROL_UNKNOWN;
 211 }
 212
 213 static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
 214 {
 215     unsigned char *start=NULL;
 216     int y,len=-1;
 217     while(len<minlen){
 218         AVPacket pkt;
 219         int len2=maxlen;
 220         double pts;
 221         int x=ds_get_packet_pts(sh_audio->ds,&start, &pts);
 222         if(x<=0) {
 223             start = NULL;
 224             x = 0;
 225             ds_parse(sh_audio->ds, &start, &x, MP_NOPTS_VALUE, 0);
 226             if (x <= 0)
 227                 break; // error
 228         } else {
 229             int in_size = x;
 230             int consumed = ds_parse(sh_audio->ds, &start, &x, pts, 0);
 231             sh_audio->ds->buffer_pos -= in_size - consumed;
 232         }
 233         av_init_packet(&pkt);
 234         pkt.data = start;
 235         pkt.size = x;
 236         if (pts != MP_NOPTS_VALUE) {
 237             sh_audio->pts = pts;
 238             sh_audio->pts_bytes = 0;
 239         }
 240         y=avcodec_decode_audio3(sh_audio->context,(int16_t*)buf,&len2,&pkt);
 241 //printf("return:%d samples_out:%d bitstream_in:%d sample_sum:%d\n", y, len2, x, len); fflush(stdout);
 242         // LATM may need many packets to find mux info
 243         if (y == AVERROR(EAGAIN))
 244             continue;
 245         if(y<0){ mp_msg(MSGT_DECAUDIO,MSGL_V,"lavc_audio: error\n");break; }
 246         if(!sh_audio->parser && y<x)
 247             sh_audio->ds->buffer_pos+=y-x;  // put back data (HACK!)
 248         if(len2>0){
 249           if (((AVCodecContext *)sh_audio->context)->channels >= 5) {
 250             int samplesize = av_get_bits_per_sample_format(((AVCodecContext *)
 251                                     sh_audio->context)->sample_fmt) / 8;
 252             reorder_channel_nch(buf, AF_CHANNEL_LAYOUT_LAVC_DEFAULT,
 253                                 AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 254                                 ((AVCodecContext *)sh_audio->context)->channels,
 255                                 len2 / samplesize, samplesize);
 256           }
 257           //len=len2;break;
 258           if(len<0) len=len2; else len+=len2;
 259           buf+=len2;
 260           maxlen -= len2;
 261           sh_audio->pts_bytes += len2;
 262         }
 263         mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"Decoded %d -> %d  \n",y,len2);
 264
 265         if (setup_format(sh_audio, sh_audio->context))
 266             break;
 267     }
 268   return len;
 269 }