Release synfig_0_61_03

[synfig.git] / synfig-core / tags / synfig_0_61_03 / synfig-core / src / modules / mod_libavcodec / libavcodec / mp3lameaudio.c

diff --git a/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/mp3lameaudio.c b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/mp3lameaudio.c
new file mode 100644 (file)
index 0000000..0a121eb
--- /dev/null
+++ b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/mp3lameaudio.c
@@ -0,0 +1,107 @@
+/*
+ * Interface to libmp3lame for mp3 encoding
+ * Copyright (c) 2002 Lennert Buytenhek <buytenh@gnu.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+ 
+/**
+ * @file mp3lameaudio.c
+ * Interface to libmp3lame for mp3 encoding.
+ */
+
+#include "avcodec.h"
+#include "mpegaudio.h"
+#include <lame/lame.h>
+
+typedef struct Mp3AudioContext {
+       lame_global_flags *gfp;
+       int stereo;
+} Mp3AudioContext;
+
+
+static int MP3lame_encode_init(AVCodecContext *avctx)
+{
+       Mp3AudioContext *s = avctx->priv_data;
+
+       if (avctx->channels > 2)
+               return -1;
+
+       s->stereo = avctx->channels > 1 ? 1 : 0;
+
+       if ((s->gfp = lame_init()) == NULL)
+               goto err;
+       lame_set_in_samplerate(s->gfp, avctx->sample_rate);
+       lame_set_out_samplerate(s->gfp, avctx->sample_rate);
+       lame_set_num_channels(s->gfp, avctx->channels);
+       /* lame 3.91 dies on quality != 5 */
+       lame_set_quality(s->gfp, 5);
+       /* lame 3.91 doesn't work in mono */
+       lame_set_mode(s->gfp, JOINT_STEREO);
+       lame_set_brate(s->gfp, avctx->bit_rate/1000);
+       if (lame_init_params(s->gfp) < 0)
+               goto err_close;
+
+       avctx->frame_size = MPA_FRAME_SIZE;
+    
+        avctx->coded_frame= avcodec_alloc_frame();
+        avctx->coded_frame->key_frame= 1;
+
+       return 0;
+
+err_close:
+       lame_close(s->gfp);
+err:
+       return -1;
+}
+
+int MP3lame_encode_frame(AVCodecContext *avctx,
+                     unsigned char *frame, int buf_size, void *data)
+{
+       Mp3AudioContext *s = avctx->priv_data;
+       int num;
+
+       /* lame 3.91 dies on '1-channel interleaved' data */
+       if (s->stereo) {
+               num = lame_encode_buffer_interleaved(s->gfp, data,
+                       MPA_FRAME_SIZE, frame, buf_size);
+       } else {
+               num = lame_encode_buffer(s->gfp, data, data, MPA_FRAME_SIZE,
+                       frame, buf_size);
+       }
+
+       return num;
+}
+
+int MP3lame_encode_close(AVCodecContext *avctx)
+{
+       Mp3AudioContext *s = avctx->priv_data;
+    
+        av_freep(&avctx->coded_frame);
+
+       lame_close(s->gfp);
+       return 0;
+}
+
+
+AVCodec mp3lame_encoder = {
+    "mp3",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_MP3,
+    sizeof(Mp3AudioContext),
+    MP3lame_encode_init,
+    MP3lame_encode_frame,
+    MP3lame_encode_close
+};