1 files changed, 97 insertions, 0 deletions
diff --git a/include/osmocom/gapk/formats.h b/include/osmocom/gapk/formats.h
new file mode 100644
index 0000000..d1521d0
--- /dev/null
+++ b/include/osmocom/gapk/formats.h
@@ -0,0 +1,97 @@
+/* Formats handling */
+
+/*
+ * This file is part of gapk (GSM Audio Pocket Knife).
+ *
+ * gapk 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * gapk 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 gapk.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+enum osmo_gapk_format_type {
+	FMT_INVALID = 0,
+
+	/* Classic .amr container */
+	FMT_AMR_EFR,
+
+	/* Classic .gsm file for FR */
+	FMT_GSM,
+
+	/* 3GPP Reference HR vocodec files */
+	FMT_HR_REF_DEC,
+	FMT_HR_REF_ENC,
+
+	/* Racal 6103E TCH recordings */
+	FMT_RACAL_HR,
+	FMT_RACAL_FR,
+	FMT_RACAL_EFR,
+
+	/* Raw PCM */
+	FMT_RAWPCM_S16LE,
+
+	/* Texas Instrument calypso/locosto buffer format */
+	FMT_TI_HR,
+	FMT_TI_FR,
+	FMT_TI_EFR,
+
+	/* AMR encoded data, variable length */
+	FMT_AMR_OPENCORE,
+	FMT_RTP_AMR,
+
+	FMT_RTP_EFR,
+
+	/* HR in RTP according to ETSI TS 101 318 */
+	FMT_RTP_HR_ETSI,
+	/* HR in RTP according to IETF RFC5993 */
+	FMT_RTP_HR_IETF,
+
+	_FMT_MAX,
+};
+
+/* Need to import here because of enum interdep */
+#include <osmocom/gapk/codecs.h>
+
+/*! call-back for actual format conversion function
+ *  \param[out] dst caller-allocated buffer for output data
+ *  \param[in] src input data
+ *  \param[in] src_len length of input data \a src
+ *  \returns number of output bytes written to \a dst; negative on error */
+typedef int (*osmo_gapk_fmt_conv_cb_t)(uint8_t *dst,
+	const uint8_t *src, unsigned int src_len);
+
+struct osmo_gapk_format_desc {
+	enum osmo_gapk_format_type type;
+	enum osmo_gapk_codec_type codec_type;
+	const char *description;
+	const char *name;
+
+	/*! Length of frames in this format (as opposed to canonical) */
+	unsigned int frame_len;
+
+	/* Format conversation function pointers */
+	osmo_gapk_fmt_conv_cb_t conv_from_canon;
+	osmo_gapk_fmt_conv_cb_t conv_to_canon;
+
+	/*! Length of a (global) header at start of file */
+	unsigned int header_len;
+	/*! Exact match for (global) header at start of file */
+	const uint8_t *header;
+};
+
+const struct osmo_gapk_format_desc *
+osmo_gapk_fmt_get_from_type(enum osmo_gapk_format_type type);
+const struct osmo_gapk_format_desc *
+osmo_gapk_fmt_get_from_name(const char *name);