imported from MPlayerXP, dlopen() hack removed, some bugs fixed, interface functions changed to static, info->author field added

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@5341 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 106 insertions, 0 deletions

diff --git a/libmpcodecs/ad_ffmpeg.c b/libmpcodecs/ad_ffmpeg.c
new file mode 100644
index 0000000000..9929ca2802
--- /dev/null
+++ b/libmpcodecs/ad_ffmpeg.c
@@ -0,0 +1,106 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "config.h"
+#include "mp_msg.h"
+#include "help_mp.h"
+
+#include "ad_internal.h"
+
+#include "bswap.h"
+
+static ad_info_t info = 
+{
+	"FFmpeg audio decoders",
+	"ffmpeg",
+	AFM_FFMPEG,
+	"Nick Kurshev",
+	"ffmpeg.sf.net",
+	""
+};
+
+LIBAD_EXTERN(ffmpeg)
+
+#define assert(x)
+#include "../libavcodec/avcodec.h"
+
+static AVCodec *lavc_codec=NULL;
+static AVCodecContext lavc_context;
+extern int avcodec_inited;
+
+static int preinit(sh_audio_t *sh)
+{
+  sh->audio_out_minsize=AVCODEC_MAX_AUDIO_FRAME_SIZE;
+  return 1;
+}
+
+static int init(sh_audio_t *sh_audio)
+{
+   int x;
+   mp_msg(MSGT_DECAUDIO,MSGL_V,"FFmpeg's libavcodec audio codec\n");
+    if(!avcodec_inited){
+      avcodec_init();
+      avcodec_register_all();
+      avcodec_inited=1;
+    }
+    lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh_audio->codec->dll);
+    if(!lavc_codec){
+	mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingLAVCcodec,sh_audio->codec->dll);
+	return 0;
+    }
+    memset(&lavc_context, 0, sizeof(lavc_context));
+    /* open it */
+    if (avcodec_open(&lavc_context, lavc_codec) < 0) {
+        mp_msg(MSGT_DECAUDIO,MSGL_ERR, MSGTR_CantOpenCodec);
+        return 0;
+    }
+   mp_msg(MSGT_DECAUDIO,MSGL_V,"INFO: libavcodec init OK!\n");
+
+   // Decode at least 1 byte:  (to get header filled)
+   x=decode_audio(sh_audio,sh_audio->a_buffer,1,sh_audio->a_buffer_size);
+   if(x>0) sh_audio->a_buffer_len=x;
+
+#if 1
+  sh_audio->channels=lavc_context.channels;
+  sh_audio->samplerate=lavc_context.sample_rate;
+  sh_audio->i_bps=lavc_context.bit_rate/8;
+#else
+  sh_audio->channels=sh_audio->wf->nChannels;
+  sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
+  sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
+#endif
+  return 1;
+}
+
+static void uninit(sh_audio_t *sh)
+{
+  avcodec_close(&lavc_context);
+}
+
+static int control(sh_audio_t *sh,int cmd,void* arg, ...)
+{
+    // TODO ???
+  return CONTROL_UNKNOWN;
+}
+
+static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
+{
+    unsigned char *start=NULL;
+    int y,len=-1;
+    while(len<minlen){
+	int len2=0;
+	int x=ds_get_packet(sh_audio->ds,&start);
+	if(x<=0) break; // error
+	y=avcodec_decode_audio(&lavc_context,(INT16*)buf,&len2,start,x);
+	if(y<0){ mp_msg(MSGT_DECAUDIO,MSGL_V,"lavc_audio: error\n");break; }
+	if(y<x) sh_audio->ds->buffer_pos+=y-x;  // put back data (HACK!)
+	if(len2>0){
+	  //len=len2;break;
+	  if(len<0) len=len2; else len+=len2;
+	  buf+=len2;
+	}
+        mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"Decoded %d -> %d  \n",y,len2);
+    }
+  return len;
+}