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-rw-r--r--src/Makefile.am4
-rw-r--r--src/encoder/lame_encoder.c284
-rw-r--r--src/encoder_list.c4
3 files changed, 292 insertions, 0 deletions
diff --git a/src/Makefile.am b/src/Makefile.am
index 9d3529827..03785d974 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -352,6 +352,10 @@ mpd_SOURCES += encoder_list.c
if ENABLE_VORBIS_ENCODER
mpd_SOURCES += encoder/vorbis_encoder.c
endif
+
+if ENABLE_LAME_ENCODER
+mpd_SOURCES += encoder/lame_encoder.c
+endif
endif
diff --git a/src/encoder/lame_encoder.c b/src/encoder/lame_encoder.c
new file mode 100644
index 000000000..73501c34c
--- /dev/null
+++ b/src/encoder/lame_encoder.c
@@ -0,0 +1,284 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "encoder_api.h"
+#include "encoder_plugin.h"
+#include "audio_format.h"
+
+#include <lame/lame.h>
+#include <assert.h>
+#include <string.h>
+
+struct lame_encoder {
+ struct encoder encoder;
+
+ struct audio_format audio_format;
+ float quality;
+ int bitrate;
+
+ lame_global_flags *gfp;
+
+ unsigned char buffer[32768];
+ size_t buffer_length;
+};
+
+extern const struct encoder_plugin lame_encoder_plugin;
+
+static inline GQuark
+lame_encoder_quark(void)
+{
+ return g_quark_from_static_string("lame_encoder");
+}
+
+static bool
+lame_encoder_configure(struct lame_encoder *encoder,
+ const struct config_param *param, GError **error)
+{
+ const char *value;
+ char *endptr;
+
+ value = config_get_block_string(param, "quality", NULL);
+ if (value != NULL) {
+ /* a quality was configured (VBR) */
+
+ encoder->quality = g_ascii_strtod(value, &endptr);
+
+ if (*endptr != '\0' || encoder->quality < -1.0 ||
+ encoder->quality > 10.0) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "quality \"%s\" is not a number in the "
+ "range -1 to 10, line %i",
+ value, param->line);
+ return false;
+ }
+
+ if (config_get_block_string(param, "bitrate", NULL) != NULL) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "quality and bitrate are "
+ "both defined (line %i)",
+ param->line);
+ return false;
+ }
+ } else {
+ /* a bit rate was configured */
+
+ value = config_get_block_string(param, "bitrate", NULL);
+ if (value == NULL) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "neither bitrate nor quality defined "
+ "at line %i",
+ param->line);
+ return false;
+ }
+
+ encoder->quality = -2.0;
+ encoder->bitrate = g_ascii_strtoll(value, &endptr, 10);
+
+ if (*endptr != '\0' || encoder->bitrate <= 0) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "bitrate at line %i should be a positive integer",
+ param->line);
+ return false;
+ }
+ }
+
+ return true;
+}
+
+static struct encoder *
+lame_encoder_init(const struct config_param *param, GError **error)
+{
+ struct lame_encoder *encoder;
+
+ encoder = g_new(struct lame_encoder, 1);
+ encoder_struct_init(&encoder->encoder, &lame_encoder_plugin);
+
+ /* load configuration from "param" */
+ if (!lame_encoder_configure(encoder, param, error)) {
+ /* configuration has failed, roll back and return error */
+ g_free(encoder);
+ return NULL;
+ }
+
+ return &encoder->encoder;
+}
+
+static void
+lame_encoder_finish(struct encoder *_encoder)
+{
+ struct lame_encoder *encoder = (struct lame_encoder *)_encoder;
+
+ /* the real liblame cleanup was already performed by
+ lame_encoder_close(), so no real work here */
+ g_free(encoder);
+}
+
+static bool
+lame_encoder_setup(struct lame_encoder *encoder, GError **error)
+{
+ if (encoder->quality >= -1.0) {
+ /* a quality was configured (VBR) */
+
+ if (0 != lame_set_VBR(encoder->gfp, vbr_rh)) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "error setting lame VBR mode");
+ return false;
+ }
+ if (0 != lame_set_VBR_q(encoder->gfp, encoder->quality)) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "error setting lame VBR quality");
+ return false;
+ }
+ } else {
+ /* a bit rate was configured */
+
+ if (0 != lame_set_brate(encoder->gfp, encoder->bitrate)) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "error setting lame bitrate");
+ return false;
+ }
+ }
+
+ if (0 != lame_set_num_channels(encoder->gfp,
+ encoder->audio_format.channels)) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "error setting lame num channels");
+ return false;
+ }
+
+ if (0 != lame_set_in_samplerate(encoder->gfp,
+ encoder->audio_format.sample_rate)) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "error setting lame sample rate");
+ return false;
+ }
+
+ if (0 > lame_init_params(encoder->gfp)) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "error initializing lame params");
+ return false;
+ }
+
+ return true;
+}
+
+static bool
+lame_encoder_open(struct encoder *_encoder, struct audio_format *audio_format,
+ GError **error)
+{
+ struct lame_encoder *encoder = (struct lame_encoder *)_encoder;
+
+ audio_format->bits = 16;
+ audio_format->channels = 2;
+
+ encoder->audio_format = *audio_format;
+
+ encoder->gfp = lame_init();
+ if (encoder->gfp == NULL) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "lame_init() failed");
+ return false;
+ }
+
+ if (!lame_encoder_setup(encoder, error)) {
+ lame_close(encoder->gfp);
+ return false;
+ }
+
+ encoder->buffer_length = 0;
+
+ return true;
+}
+
+static void
+lame_encoder_close(struct encoder *_encoder)
+{
+ struct lame_encoder *encoder = (struct lame_encoder *)_encoder;
+
+ lame_close(encoder->gfp);
+}
+
+static bool
+lame_encoder_write(struct encoder *_encoder,
+ const void *data, size_t length,
+ G_GNUC_UNUSED GError **error)
+{
+ struct lame_encoder *encoder = (struct lame_encoder *)_encoder;
+ unsigned num_frames;
+ float *left, *right;
+ const int16_t *src = (const int16_t*)data;
+ unsigned int i;
+ int bytes_out;
+
+ assert(encoder->buffer_length == 0);
+
+ num_frames =
+ length / audio_format_frame_size(&encoder->audio_format);
+ left = g_malloc(sizeof(left[0]) * num_frames);
+ right = g_malloc(sizeof(right[0]) * num_frames);
+
+ /* this is for only 16-bit audio */
+
+ for (i = 0; i < num_frames; i++) {
+ left[i] = *src++;
+ right[i] = *src++;
+ }
+
+ bytes_out = lame_encode_buffer_float(encoder->gfp, left, right,
+ num_frames, encoder->buffer,
+ sizeof(encoder->buffer));
+
+ g_free(left);
+ g_free(right);
+
+ if (bytes_out < 0) {
+ g_set_error(error, lame_encoder_quark(), 0,
+ "lame encoder failed");
+ return false;
+ }
+
+ encoder->buffer_length = (size_t)bytes_out;
+ return true;
+}
+
+static size_t
+lame_encoder_read(struct encoder *_encoder, void *dest, size_t length)
+{
+ struct lame_encoder *encoder = (struct lame_encoder *)_encoder;
+
+ if (length > encoder->buffer_length)
+ length = encoder->buffer_length;
+
+ memcpy(dest, encoder->buffer, length);
+
+ encoder->buffer_length -= length;
+ memmove(encoder->buffer, encoder->buffer + length,
+ encoder->buffer_length);
+
+ return length;
+}
+
+const struct encoder_plugin lame_encoder_plugin = {
+ .name = "lame",
+ .init = lame_encoder_init,
+ .finish = lame_encoder_finish,
+ .open = lame_encoder_open,
+ .close = lame_encoder_close,
+ .write = lame_encoder_write,
+ .read = lame_encoder_read,
+};
diff --git a/src/encoder_list.c b/src/encoder_list.c
index 9b384490c..f9f518936 100644
--- a/src/encoder_list.c
+++ b/src/encoder_list.c
@@ -23,11 +23,15 @@
#include <string.h>
extern const struct encoder_plugin vorbis_encoder_plugin;
+extern const struct encoder_plugin lame_encoder_plugin;
static const struct encoder_plugin *encoder_plugins[] = {
#ifdef ENABLE_VORBIS_ENCODER
&vorbis_encoder_plugin,
#endif
+#ifdef ENABLE_LAME_ENCODER
+ &lame_encoder_plugin,
+#endif
NULL
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 07:30:42 +0000