diff options
author | Zeno Albisser <zeno.albisser@digia.com> | 2013-08-15 21:46:11 +0200 |
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committer | Zeno Albisser <zeno.albisser@digia.com> | 2013-08-15 21:46:11 +0200 |
commit | 679147eead574d186ebf3069647b4c23e8ccace6 (patch) | |
tree | fc247a0ac8ff119f7c8550879ebb6d3dd8d1ff69 /chromium/third_party/ffmpeg/libavcodec/internal.h |
Initial import.
Diffstat (limited to 'chromium/third_party/ffmpeg/libavcodec/internal.h')
-rw-r--r-- | chromium/third_party/ffmpeg/libavcodec/internal.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/chromium/third_party/ffmpeg/libavcodec/internal.h b/chromium/third_party/ffmpeg/libavcodec/internal.h new file mode 100644 index 00000000000..4962f064e10 --- /dev/null +++ b/chromium/third_party/ffmpeg/libavcodec/internal.h @@ -0,0 +1,235 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg 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, + * 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 + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * common internal api header. + */ + +#ifndef AVCODEC_INTERNAL_H +#define AVCODEC_INTERNAL_H + +#include <stdint.h> + +#include "libavutil/buffer.h" +#include "libavutil/mathematics.h" +#include "libavutil/pixfmt.h" +#include "avcodec.h" +#include "config.h" + +#define FF_SANE_NB_CHANNELS 63U + +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; + +#if FF_API_OLD_ENCODE_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; + + AVFrame to_free; + + FramePool *pool; + + /** + * temporary buffer used for encoders to store their bitstream + */ + uint8_t *byte_buffer; + unsigned int byte_buffer_size; + + void *frame_thread_encoder; + + /** + * Number of audio samples to skip at the start of the next decoded frame + */ + int skip_samples; +} 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); + +/** + * does needed setup of pkt_pts/pos and such for (re)get_buffer(); + */ +int ff_init_buffer_info(AVCodecContext *s, AVFrame *frame); + + +void avpriv_color_frame(AVFrame *frame, const int color[4]); + +/** + * Remove and free all side data from packet. + */ +void ff_packet_free_side_data(AVPacket *pkt); + +extern volatile int ff_avcodec_locked; +int ff_lock_avcodec(AVCodecContext *log_ctx); +int ff_unlock_avcodec(void); + +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 avctx the AVCodecContext of the encoder + * @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_packet2(AVCodecContext *avctx, AVPacket *avpkt, int size); + +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) +{ + if(samples == AV_NOPTS_VALUE) + return AV_NOPTS_VALUE; + 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); + +int ff_thread_can_start_frame(AVCodecContext *avctx); + +int ff_get_logical_cpus(AVCodecContext *avctx); + +int avpriv_h264_has_num_reorder_frames(AVCodecContext *avctx); + +/** + * Call avcodec_open2 recursively by decrementing counter, unlocking mutex, + * calling the function and then restoring again. Assumes the mutex is + * already locked + */ +int ff_codec_open2_recursive(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options); + +/** + * Call avcodec_close recursively, counterpart to avcodec_open2_recursive. + */ +int ff_codec_close_recursive(AVCodecContext *avctx); + +/** + * Finalize buf into extradata and set its size appropriately. + */ +int avpriv_bprint_to_extradata(AVCodecContext *avctx, struct AVBPrint *buf); + +const uint8_t *avpriv_find_start_code(const uint8_t *p, + const uint8_t *end, + uint32_t *state); + +#endif /* AVCODEC_INTERNAL_H */ |