/*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file libavcodec/internal.h
+ * @file
* common internal api header.
*/
#define AVCODEC_INTERNAL_H
#include <stdint.h>
+
+#include "libavutil/buffer.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/pixfmt.h"
#include "avcodec.h"
+#include "config.h"
/**
- * Determines whether pix_fmt is a hardware accelerated format.
+ * The codec does not modify any global variables in the init function,
+ * allowing to call the init function without locking any global mutexes.
+ */
+#define FF_CODEC_CAP_INIT_THREADSAFE (1 << 0)
+/**
+ * The codec allows calling the close function for deallocation even if
+ * the init function returned a failure. Without this capability flag, a
+ * codec does such cleanup internally when returning failures from the
+ * init function and does not expect the close function to be called at
+ * all.
+ */
+#define FF_CODEC_CAP_INIT_CLEANUP (1 << 1)
+/**
+ * Decoders marked with FF_CODEC_CAP_SETS_PKT_DTS want to set
+ * AVFrame.pkt_dts manually. If the flag is set, utils.c won't overwrite
+ * this field. If it's unset, utils.c tries to guess the pkt_dts field
+ * from the input AVPacket.
*/
-int ff_is_hwaccel_pix_fmt(enum PixelFormat pix_fmt);
+#define FF_CODEC_CAP_SETS_PKT_DTS (1 << 2)
+
+#ifdef DEBUG
+# define ff_dlog(ctx, ...) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__)
+#else
+# define ff_dlog(ctx, ...) do { } while (0)
+#endif
+
+#ifdef TRACE
+# define ff_tlog(ctx, ...) av_log(ctx, AV_LOG_TRACE, __VA_ARGS__)
+#else
+# define ff_tlog(ctx, ...) do { } while (0)
+#endif
+
+
+#if !FF_API_QUANT_BIAS
+#define FF_DEFAULT_QUANT_BIAS 999999
+#endif
+
+#define FF_SANE_NB_CHANNELS 63U
+
+#define FF_SIGNBIT(x) (x >> CHAR_BIT * sizeof(x) - 1)
+
+typedef struct FramePool {
+ /**
+ * Pools for each data plane. For audio all the planes have the same size,
+ * so only pools[0] is used.
+ */
+ AVBufferPool *pools[4];
+
+ /*
+ * Pool parameters
+ */
+ int format;
+ int width, height;
+ int stride_align[AV_NUM_DATA_POINTERS];
+ int linesize[4];
+ int planes;
+ int channels;
+ int samples;
+} FramePool;
+
+typedef struct AVCodecInternal {
+ /**
+ * 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;
+
+ /**
+ * Whether to allocate progress for frame threading.
+ *
+ * The codec must set it to 1 if it uses ff_thread_await/report_progress(),
+ * then progress will be allocated in ff_thread_get_buffer(). The frames
+ * then MUST be freed with ff_thread_release_buffer().
+ *
+ * If the codec does not need to call the progress functions (there are no
+ * dependencies between the frames), it should leave this at 0. Then it can
+ * decode straight to the user-provided frames (which the user will then
+ * free with av_frame_unref()), there is no need to call
+ * ff_thread_release_buffer().
+ */
+ int allocate_progress;
+
+ /**
+ * An audio frame with less than required samples has been submitted and
+ * padded with silence. Reject all subsequent frames.
+ */
+ int last_audio_frame;
+
+ AVFrame *to_free;
+
+ FramePool *pool;
+
+ void *thread_ctx;
+
+ /**
+ * Current packet as passed into the decoder, to avoid having to pass the
+ * packet into every function.
+ */
+ AVPacket *pkt;
+
+ /**
+ * hwaccel-specific private data
+ */
+ void *hwaccel_priv_data;
+
+ /**
+ * checks API usage: after codec draining, flush is required to resume operation
+ */
+ int draining;
+
+ /**
+ * buffers for using new encode/decode API through legacy API
+ */
+ AVPacket *buffer_pkt;
+ int buffer_pkt_valid; // encoding: packet without data can be valid
+ AVFrame *buffer_frame;
+ int draining_done;
+} AVCodecInternal;
+
+struct AVCodecDefault {
+ const uint8_t *key;
+ const uint8_t *value;
+};
/**
- * Returns the hardware accelerated codec for codec codec_id and
- * pixel format 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) - AV_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 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.
+ * @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, int flags);
+
+/**
+ * Identical in function to av_frame_make_writable(), except it uses
+ * ff_get_buffer() to allocate the buffer when needed.
+ */
+int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame);
+
+const uint8_t *avpriv_find_start_code(const uint8_t *restrict p,
+ const uint8_t *end,
+ uint32_t *restrict state);
+
+/**
+ * Check that the provided frame dimensions are valid and set them on the codec
+ * context.
+ */
+int ff_set_dimensions(AVCodecContext *s, int width, int height);
+
+/**
+ * Check that the provided sample aspect ratio is valid and set it on the codec
+ * context.
+ */
+int ff_set_sar(AVCodecContext *avctx, AVRational sar);
+
+/**
+ * Add or update AV_FRAME_DATA_MATRIXENCODING side data.
+ */
+int ff_side_data_update_matrix_encoding(AVFrame *frame,
+ enum AVMatrixEncoding matrix_encoding);
+
+/**
+ * Select the (possibly hardware accelerated) pixel format.
+ * This is a wrapper around AVCodecContext.get_format() and should be used
+ * instead of calling get_format() directly.
+ */
+int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt);
+
+/**
+ * Set various frame properties from the codec context / packet data.
+ */
+int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame);
+
+/**
+ * Add a CPB properties side data to an encoding context.
*/
-AVHWAccel *ff_find_hwaccel(enum CodecID codec_id, enum PixelFormat pix_fmt);
+AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx);
#endif /* AVCODEC_INTERNAL_H */
projects / ffmpeg / blobdiff