-#ifndef INTERNAL_H
-#define INTERNAL_H
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
/**
- * @file internal.h
- * common functions for internal libavcodec use
+ * @file
+ * common internal api header.
*/
+#ifndef AVCODEC_INTERNAL_H
+#define AVCODEC_INTERNAL_H
+
+#include <stdint.h>
+
+#include "libavutil/mathematics.h"
+#include "libavutil/pixfmt.h"
+#include "avcodec.h"
+
+#define FF_SANE_NB_CHANNELS 128U
+
+typedef struct InternalBuffer {
+ uint8_t *base[AV_NUM_DATA_POINTERS];
+ uint8_t *data[AV_NUM_DATA_POINTERS];
+ int linesize[AV_NUM_DATA_POINTERS];
+ int width;
+ int height;
+ enum AVPixelFormat pix_fmt;
+} InternalBuffer;
+
+typedef struct AVCodecInternal {
+ /**
+ * internal buffer count
+ * used by default get/release/reget_buffer().
+ */
+ int buffer_count;
+
+ /**
+ * internal buffers
+ * used by default get/release/reget_buffer().
+ */
+ InternalBuffer *buffer;
+
+ /**
+ * Whether the parent AVCodecContext is a copy of the context which had
+ * init() called on it.
+ * This is used by multithreading - shared tables and picture pointers
+ * should be freed from the original context only.
+ */
+ int is_copy;
-int av_tempfile(char *prefix, char **filename);
+#if FF_API_OLD_DECODE_AUDIO
+ /**
+ * Internal sample count used by avcodec_encode_audio() to fabricate pts.
+ * Can be removed along with avcodec_encode_audio().
+ */
+ int sample_count;
+#endif
+
+ /**
+ * An audio frame with less than required samples has been submitted and
+ * padded with silence. Reject all subsequent frames.
+ */
+ int last_audio_frame;
+
+ /**
+ * The data for the last allocated audio frame.
+ * Stored here so we can free it.
+ */
+ uint8_t *audio_data;
+} AVCodecInternal;
+
+struct AVCodecDefault {
+ const uint8_t *key;
+ const uint8_t *value;
+};
+
+/**
+ * Return the hardware accelerated codec for codec codec_id and
+ * pixel format pix_fmt.
+ *
+ * @param codec_id the codec to match
+ * @param pix_fmt the pixel format to match
+ * @return the hardware accelerated codec, or NULL if none was found.
+ */
+AVHWAccel *ff_find_hwaccel(enum AVCodecID codec_id, enum AVPixelFormat pix_fmt);
+
+/**
+ * Return the index into tab at which {a,b} match elements {[0],[1]} of tab.
+ * If there is no such matching pair then size is returned.
+ */
+int ff_match_2uint16(const uint16_t (*tab)[2], int size, int a, int b);
+
+unsigned int avpriv_toupper4(unsigned int x);
+
+int avpriv_lock_avformat(void);
+int avpriv_unlock_avformat(void);
+
+/**
+ * Maximum size in bytes of extradata.
+ * This value was chosen such that every bit of the buffer is
+ * addressable by a 32-bit signed integer as used by get_bits.
+ */
+#define FF_MAX_EXTRADATA_SIZE ((1 << 28) - FF_INPUT_BUFFER_PADDING_SIZE)
+
+/**
+ * Check AVPacket size and/or allocate data.
+ *
+ * Encoders supporting AVCodec.encode2() can use this as a convenience to
+ * ensure the output packet data is large enough, whether provided by the user
+ * or allocated in this function.
+ *
+ * @param avpkt the AVPacket
+ * If avpkt->data is already set, avpkt->size is checked
+ * to ensure it is large enough.
+ * If avpkt->data is NULL, a new buffer is allocated.
+ * avpkt->size is set to the specified size.
+ * All other AVPacket fields will be reset with av_init_packet().
+ * @param size the minimum required packet size
+ * @return 0 on success, negative error code on failure
+ */
+int ff_alloc_packet(AVPacket *avpkt, int size);
+
+/**
+ * Rescale from sample rate to AVCodecContext.time_base.
+ */
+static av_always_inline int64_t ff_samples_to_time_base(AVCodecContext *avctx,
+ int64_t samples)
+{
+ return av_rescale_q(samples, (AVRational){ 1, avctx->sample_rate },
+ avctx->time_base);
+}
+
+/**
+ * Get a buffer for a frame. This is a wrapper around
+ * AVCodecContext.get_buffer() and should be used instead calling get_buffer()
+ * directly.
+ */
+int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame);
-#endif /* INTERNAL_H */
+#endif /* AVCODEC_INTERNAL_H */
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