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mfc: Add mfc_decoder library from FXI

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Sebastian Dröge 2012-12-23 09:56:03 +01:00
parent 2cae6df5e5
commit d4c78fc4ca
2 changed files with 847 additions and 0 deletions
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658
sys/mfc/mfc_decoder/mfc_decoder.c Normal file
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/*
* Copyright 2012 FXI Technologies
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Author: Haavard Kvaalen <havardk@fxitech.com>
*/
#include "mfc_decoder.h"
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <videodev2.h>
#define LOG_TAG "MFC-DEC"
#include <utils/Log.h>
#define MAX_DECODER_INPUT_BUFFER_SIZE (1024 * 3072)
#define NUM_INPUT_PLANES 1
#define NUM_OUTPUT_PLANES 2
#define MAX_DECODING_TIME 50
#define MFC_PATH "/dev/video8"
static int mfc_in_use;
/* Protects the mfc_in_use variable */
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
struct mfc_dec_context {
int fd;
int num_input_buffers;
int num_output_buffers;
struct mfc_buffer *input_buffer;
struct mfc_buffer *output_buffer;
/*
* Number of decoded frames the MFC needs to have access to to
* decode correctly.
*/
int required_output_buffers;
int has_free_input_buffers;
/*
* Number of frames that have been decoded. We cannot return them
* if this number is less than required_output_buffers.
*/
int output_frames_available;
int input_frames_queued;
/* We have reached end of stream */
int eos_reached;
struct {
int w;
int h;
} output_size;
struct {
int left;
int top;
int w;
int h;
} crop_size;
};
struct mfc_buffer {
struct {
int length;
int bytesused;
void *data;
} plane[2];
int index;
int state;
};
enum {
BUFFER_FREE,
BUFFER_ENQUEUED,
BUFFER_DEQUEUED,
};
static unsigned int to_v4l2_codec(enum mfc_codec_type codec)
{
switch (codec) {
case CODEC_TYPE_H264:
return V4L2_PIX_FMT_H264;
case CODEC_TYPE_VC1:
return V4L2_PIX_FMT_VC1_ANNEX_G;
case CODEC_TYPE_VC1_RCV:
return V4L2_PIX_FMT_VC1_ANNEX_L;
case CODEC_TYPE_MPEG4:
return V4L2_PIX_FMT_MPEG4;
case CODEC_TYPE_MPEG1:
return V4L2_PIX_FMT_MPEG1;
case CODEC_TYPE_MPEG2:
return V4L2_PIX_FMT_MPEG2;
case CODEC_TYPE_H263:
return V4L2_PIX_FMT_H263;
}
LOGE("Invalid codec type %d", codec);
return 0;
}
int mfc_dec_set_codec(struct mfc_dec_context *ctx, enum mfc_codec_type codec)
{
struct v4l2_format fmt = {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
.fmt = {
.pix_mp = {
.num_planes = 1,
.plane_fmt = {
[0] = {
.sizeimage = MAX_DECODER_INPUT_BUFFER_SIZE,
},
},
},
},
};
fmt.fmt.pix_mp.pixelformat = to_v4l2_codec(codec);
int ret = ioctl(ctx->fd, VIDIOC_S_FMT, &fmt);
if (ret)
LOGE("Unable to set input format");
return ret;
}
static int request_input_buffers(struct mfc_dec_context *ctx, int num)
{
struct v4l2_requestbuffers reqbuf = {
.count = num,
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
.memory = V4L2_MEMORY_MMAP,
};
int i;
ctx->input_buffer = calloc(num, sizeof (struct mfc_buffer));
if (!ctx->input_buffer) {
LOGE("Failed to allocate space for input buffer meta data");
return -1;
}
if (ioctl(ctx->fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
LOGE("Unable to request input buffers");
return -1;
}
ctx->num_input_buffers = reqbuf.count;
LOGI("Requested %d input buffers, got %d", num, reqbuf.count);
for (i = 0; i < num; i++) {
void *ptr;
struct v4l2_plane planes[NUM_INPUT_PLANES] = {{.length = 0}};
struct v4l2_buffer buffer = {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
.memory = V4L2_MEMORY_MMAP,
.index = i,
.length = NUM_INPUT_PLANES,
.m = {
.planes = planes,
},
};
if (ioctl(ctx->fd, VIDIOC_QUERYBUF, &buffer) < 0) {
LOGE("Query of input buffer failed");
return -1;
}
ptr = mmap(NULL, buffer.m.planes[0].length, PROT_READ | PROT_WRITE,
MAP_SHARED, ctx->fd, buffer.m.planes[0].m.mem_offset);
if (ptr == MAP_FAILED) {
LOGE("Failed to map input buffer");
return -1;
}
ctx->input_buffer[i].plane[0].length = planes[0].length;
ctx->input_buffer[i].plane[0].data = ptr;
ctx->input_buffer[i].index = i;
ctx->input_buffer[i].state = BUFFER_FREE;
}
ctx->has_free_input_buffers = 1;
return 0;
}
static int request_output_buffers(struct mfc_dec_context *ctx, int num)
{
struct v4l2_requestbuffers reqbuf = {
.count = num,
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
.memory = V4L2_MEMORY_MMAP,
};
int i;
ctx->output_buffer = calloc(num, sizeof (struct mfc_buffer));
if (!ctx->output_buffer) {
LOGE("Failed to allocate space for output buffer meta data");
return -1;
}
if (ioctl(ctx->fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
LOGE("Unable to request output buffers");
return -1;
}
ctx->num_output_buffers = reqbuf.count;
LOGI("Requested %d output buffers, got %d", num, reqbuf.count);
for (i = 0; i < ctx->num_output_buffers; i++) {
int p;
struct v4l2_plane planes[NUM_OUTPUT_PLANES] = {{.length = 0}};
struct v4l2_buffer buffer = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
.memory = V4L2_MEMORY_MMAP,
.index = i,
.length = NUM_OUTPUT_PLANES,
.m = {
.planes = planes,
},
};
ctx->output_buffer[i].index = i;
if (ioctl(ctx->fd, VIDIOC_QUERYBUF, &buffer) < 0) {
LOGE("Query of output buffer failed");
return -1;
}
for (p = 0; p < NUM_OUTPUT_PLANES; p++) {
void *ptr = mmap(NULL, buffer.m.planes[p].length,
PROT_READ | PROT_WRITE, MAP_SHARED,
ctx->fd, buffer.m.planes[p].m.mem_offset);
if (ptr == MAP_FAILED) {
LOGE("Failed to map output buffer");
return -1;
}
ctx->output_buffer[i].plane[p].length = planes[p].length;
ctx->output_buffer[i].plane[p].data = ptr;
}
if (mfc_dec_enqueue_output(ctx, &ctx->output_buffer[i]) < 0)
return -1;
}
return 0;
}
struct mfc_dec_context* mfc_dec_create(unsigned int codec, int num_input_buffers)
{
struct mfc_dec_context *ctx;
pthread_mutex_lock(&mutex);
if (mfc_in_use) {
LOGE("Rejected because MFC is already in use");
pthread_mutex_unlock(&mutex);
return NULL;
}
mfc_in_use = 1;
pthread_mutex_unlock(&mutex);
ctx = calloc(1, sizeof (struct mfc_dec_context));
// The first frame never generate any output.
// TODO: do this better
ctx->output_frames_available = -1;
if (!ctx) {
LOGE("Unable to allocate memory for context");
return NULL;
}
LOGI("Opening MFC device node at: %s", MFC_PATH);
ctx->fd = open(MFC_PATH, O_RDWR, 0);
if (ctx->fd == -1) {
LOGE("Unable to open MFC device node: %d", errno);
free(ctx);
return NULL;
}
if (mfc_dec_set_codec(ctx, codec) ||
request_input_buffers(ctx, num_input_buffers)) {
mfc_dec_destroy(ctx);
return NULL;
}
return ctx;
}
static int get_output_format(struct mfc_dec_context *ctx)
{
struct v4l2_format fmt = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
};
if (ioctl(ctx->fd, VIDIOC_G_FMT, &fmt) < 0) {
LOGE("Failed to get output format");
return -1;
}
ctx->output_size.w = fmt.fmt.pix_mp.width;
ctx->output_size.h = fmt.fmt.pix_mp.height;
return 0;
}
static int get_crop_data(struct mfc_dec_context *ctx)
{
struct v4l2_crop crop = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
};
if (ioctl(ctx->fd, VIDIOC_G_CROP, &crop) < 0) {
LOGE("Unable to get crop data");
return -1;
}
ctx->crop_size.left = crop.c.left;
ctx->crop_size.top = crop.c.top;
ctx->crop_size.w = crop.c.width;
ctx->crop_size.h = crop.c.height;
return 0;
}
int get_minimum_output_buffers(struct mfc_dec_context *ctx)
{
struct v4l2_control ctrl = {
.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
};
if (ioctl(ctx->fd, VIDIOC_G_CTRL, &ctrl) < 0) {
LOGE("Failed to get number of output buffers required");
return -1;
}
ctx->required_output_buffers = ctrl.value;
return 0;
}
static int start_input_stream(struct mfc_dec_context *ctx)
{
int type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
if (ioctl(ctx->fd, VIDIOC_STREAMON, &type) < 0) {
LOGE("Unable to start input stream");
return -1;
}
return 0;
}
static int start_output_stream(struct mfc_dec_context *ctx)
{
int type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
if (ioctl(ctx->fd, VIDIOC_STREAMON, &type) < 0) {
LOGE("Unable to start output stream");
return -1;
}
return 0;
}
int mfc_dec_init(struct mfc_dec_context *ctx, int extra_buffers)
{
if (start_input_stream(ctx) < 0)
return -1;
if (get_output_format(ctx) ||
get_crop_data(ctx) ||
get_minimum_output_buffers(ctx))
return -1;
if (request_output_buffers(ctx, ctx->required_output_buffers + extra_buffers))
return -1;
if (start_output_stream(ctx) < 0)
return -1;
return 0;
}
void mfc_dec_get_output_size(struct mfc_dec_context *ctx, int *w, int *h)
{
*w = ctx->output_size.w;
*h = ctx->output_size.h;
}
void mfc_dec_get_crop_size(struct mfc_dec_context *ctx,
int *left, int *top, int *w, int *h)
{
*left = ctx->crop_size.left;
*top = ctx->crop_size.top;
*w = ctx->crop_size.w;
*h = ctx->crop_size.h;
}
void mfc_dec_destroy(struct mfc_dec_context *ctx)
{
int i;
int type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
if (ioctl(ctx->fd, VIDIOC_STREAMOFF, &type) < 0)
LOGE("Streamoff failed on output");
type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
if (ioctl(ctx->fd, VIDIOC_STREAMOFF, &type) < 0)
LOGE("Streamoff failed on input");
for (i = 0; i < ctx->num_input_buffers; i++) {
if (ctx->input_buffer[i].plane[0].data)
munmap(ctx->input_buffer[i].plane[0].data,
ctx->input_buffer[i].plane[0].length);
}
for (i = 0; i < ctx->num_output_buffers; i++) {
int j;
for (j = 0; j < NUM_OUTPUT_PLANES; j++)
if (ctx->output_buffer[i].plane[j].data)
munmap(ctx->output_buffer[i].plane[j].data,
ctx->output_buffer[i].plane[j].length);
}
close(ctx->fd);
pthread_mutex_lock(&mutex);
mfc_in_use = 0;
pthread_mutex_unlock(&mutex);
LOGI("MFC device closed");
free(ctx);
}
int mfc_dec_enqueue_input(struct mfc_dec_context *ctx, struct mfc_buffer *buffer)
{
struct v4l2_plane planes[NUM_INPUT_PLANES] = {
[0] = {
.bytesused = buffer->plane[0].bytesused,
},
};
struct v4l2_buffer qbuf = {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
.memory = V4L2_MEMORY_MMAP,
.index = buffer->index,
.length = NUM_INPUT_PLANES,
.m = {
.planes = planes,
},
};
if (ioctl(ctx->fd, VIDIOC_QBUF, &qbuf) < 0) {
LOGE("Enqueuing of input buffer %d failed; prev state: %d",
buffer->index, buffer->state);
return -1;
}
ctx->input_frames_queued++;
buffer->state = BUFFER_ENQUEUED;
if (buffer->plane[0].bytesused == 0)
ctx->eos_reached = 1;
return 0;
}
int input_dqbuf(struct mfc_dec_context *ctx, struct mfc_buffer **buffer)
{
struct v4l2_buffer qbuf = {
.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
.memory = V4L2_MEMORY_MMAP,
};
struct pollfd fd = {
.fd = ctx->fd,
.events = POLLOUT | POLLERR,
};
int pollret;
pollret = poll(&fd, 1, MAX_DECODING_TIME);
if (pollret < 0) {
LOGE("%s: Poll returned error: %d", __func__, errno);
return -1;
}
if (pollret == 0) {
LOGI("%s: timed out", __func__);
return -2;
}
if (ioctl(ctx->fd, VIDIOC_DQBUF, &qbuf) < 0) {
LOGE("Dequeuing failed");
return -1;
}
ctx->input_buffer[qbuf.index].plane[0].bytesused = 0;
*buffer = &ctx->input_buffer[qbuf.index];
ctx->output_frames_available++;
ctx->input_frames_queued--;
return 0;
}
int mfc_dec_dequeue_input(struct mfc_dec_context *ctx, struct mfc_buffer **buffer)
{
if (ctx->has_free_input_buffers) {
int i;
*buffer = NULL;
for (i = 0; i < ctx->num_input_buffers; i++) {
if (ctx->input_buffer[i].state == BUFFER_FREE)
*buffer = &ctx->input_buffer[i];
}
if (!*buffer) {
int ret;
ctx->has_free_input_buffers = 0;
if ((ret = input_dqbuf(ctx, buffer)) < 0)
return ret;
}
} else {
int ret = input_dqbuf(ctx, buffer);
if (ret < 0)
return ret;
}
(*buffer)->state = BUFFER_DEQUEUED;
return 0;
}
static int release_input_buffer(struct mfc_dec_context *ctx)
{
struct mfc_buffer *buffer;
struct pollfd fd = {
.fd = ctx->fd,
.events = POLLOUT | POLLERR,
};
int pollret;
if (ctx->input_frames_queued == 0) {
LOGI("Nothing to release!");
return -1;
}
pollret = poll(&fd, 1, MAX_DECODING_TIME);
if (pollret < 0) {
LOGE("%s: Poll returned error: %d", __func__, errno);
return -1;
}
if (pollret == 0) {
LOGI("%s: timed out", __func__);
return -2;
}
LOGV("releasing frame; frames queued: %d", ctx->input_frames_queued);
input_dqbuf(ctx, &buffer);
buffer->state = BUFFER_FREE;
ctx->has_free_input_buffers = 1;
return 0;
}
int mfc_dec_enqueue_output(struct mfc_dec_context *ctx, struct mfc_buffer *buffer)
{
struct v4l2_plane planes[NUM_OUTPUT_PLANES] = {{.length = 0}};
struct v4l2_buffer qbuf = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
.memory = V4L2_MEMORY_MMAP,
.index = buffer->index,
.length = NUM_OUTPUT_PLANES,
.m = {
.planes = planes,
},
};
if (ioctl(ctx->fd, VIDIOC_QBUF, &qbuf) < 0) {
LOGE("Enqueuing of output buffer %d failed; prev state: %d",
buffer->index, buffer->state);
return -1;
}
buffer->state = BUFFER_ENQUEUED;
return 0;
}
int mfc_dec_dequeue_output(struct mfc_dec_context *ctx, struct mfc_buffer **buffer)
{
int i;
struct v4l2_plane planes[NUM_OUTPUT_PLANES];
struct v4l2_buffer qbuf = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
.memory = V4L2_MEMORY_MMAP,
.m = {
.planes = planes,
},
.length = NUM_OUTPUT_PLANES,
};
if (ioctl(ctx->fd, VIDIOC_DQBUF, &qbuf) < 0) {
LOGE("Dequeuing failed");
return -1;
}
for (i = 0; i < NUM_OUTPUT_PLANES; i++)
ctx->output_buffer[qbuf.index].plane[i].bytesused = qbuf.m.planes[i].bytesused;
*buffer = &(ctx->output_buffer[qbuf.index]);
ctx->output_frames_available--;
return 0;
}
int mfc_dec_output_available(struct mfc_dec_context *ctx)
{
if (ctx->eos_reached) {
if (ctx->input_frames_queued > 0 &&
ctx->output_frames_available <= ctx->required_output_buffers) {
release_input_buffer(ctx);
}
return ctx->output_frames_available > 0;
}
return ctx->output_frames_available >= ctx->required_output_buffers;
}
int mfc_dec_flush(struct mfc_dec_context *ctx)
{
int type, i;
int force_dequeue_output = 0;
while (ctx->input_frames_queued > 0) {
int status;
struct mfc_buffer *buffer;
/* Make sure there is room for the decode to finish */
if (mfc_dec_output_available(ctx) || force_dequeue_output) {
if (mfc_dec_dequeue_output(ctx, &buffer) < 0)
return -1;
if (mfc_dec_enqueue_output(ctx, buffer) < 0)
return -1;
force_dequeue_output = 0;
}
status = release_input_buffer(ctx);
if (status == -2)
force_dequeue_output = 1;
if (status == -1)
break;
}
type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
if (ioctl(ctx->fd, VIDIOC_STREAMOFF, &type) < 0) {
LOGE("Unable to stop output stream");
return -1;
}
for (i = 0; i < ctx->num_output_buffers; i++) {
if (ctx->output_buffer[i].state == BUFFER_ENQUEUED)
if (mfc_dec_enqueue_output(ctx, &ctx->output_buffer[i]) < 0)
return -1;
}
if (start_output_stream(ctx) < 0)
return -1;
ctx->output_frames_available = 0;
ctx->eos_reached = 0;
return 0;
}
void* mfc_buffer_get_input_data(struct mfc_buffer *buffer)
{
return buffer->plane[0].data;
}
int mfc_buffer_get_input_max_size(struct mfc_buffer *buffer)
{
return buffer->plane[0].length;
}
void mfc_buffer_set_input_size(struct mfc_buffer *buffer, int size)
{
buffer->plane[0].bytesused = size;
}
void mfc_buffer_get_output_data(struct mfc_buffer *buffer,
void **ybuf, void **uvbuf)
{
*ybuf = buffer->plane[0].data;
*uvbuf = buffer->plane[1].data;
}

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sys/mfc/mfc_decoder/mfc_decoder.h Normal file
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/*
* Copyright 2012 FXI Technologies
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Author: Haavard Kvaalen <havardk@fxitech.com>
*/
/*
* Interface for decoding of various video formats using the Samsung
* Multi-Format Video Codec (MFC).
*/
#ifndef VIDEO_EXYNOS4_MFC_V4L2_INCLUDE_MFC_DECODER_H
#define VIDEO_EXYNOS4_MFC_V4L2_INCLUDE_MFC_DECODER_H
struct mfc_buffer;
struct mfc_dec_context;
enum mfc_codec_type {
CODEC_TYPE_H264,
CODEC_TYPE_VC1, /* VC1 advanced profile */
CODEC_TYPE_VC1_RCV, /* VC1 simple/main profile */
CODEC_TYPE_MPEG4,
CODEC_TYPE_MPEG1,
CODEC_TYPE_MPEG2,
CODEC_TYPE_H263,
};
#ifdef __cplusplus
extern "C" {
#endif
/*
* Open the MFC decoding device node, and allocate input buffers.
*
* Returns a mfc_dec_context. Note that the context can only be used
* for decoding one stream, i.e. mfc_dec_init can only be called once.
*
* Args:
* codec: Codec type (this can later be changed with mfc_set_codec()).
* num_input_buffers: Numbers of input buffers. There is never any
* need to enqueue more than one buffer for correct decoding.
*
* Returns: A new mfc_dec_context if successful, NULL on error. This
* context is needed for most other calls below, and should be
* deallocated with mfc_dec_destroy().
*/
struct mfc_dec_context* mfc_dec_create(enum mfc_codec_type codec,
int num_input_buffers);
/*
* Destroy context created with mfc_dec_create().
*/
void mfc_dec_destroy(struct mfc_dec_context*);
/*
* Initialize video decode. Before this function is called, the
* initial input frame (which contains the header) must be enqueued.
*
* This function allocate output buffers. All output buffers will be
* enqueued initially. The actual number of output buffers depend on the
*
* Args:
* extra_buffers: Numbers of output buffers that can be kept
* dequeued at any time.
*
* Returns: Zero for success, negative value on failure.
*/
int mfc_dec_init(struct mfc_dec_context*, int extra_buffers);
/*
* This function may be called only before mfc_dec_init(). It is only
* necessary to call if the codec type is different from the one
* supplied to mfc_dec_create().
*
* Args:
* codec: Codec type
*
* Returns: Zero for success, negative value on failure.
*/
int mfc_dec_set_codec(struct mfc_dec_context*, enum mfc_codec_type codec);
/*
* Get size of image output from the MFC. The data might be larger
* than the actual video because of MFC alignment requirements (see
* the crop size below). This function can only be called after
* mfc_dec_init() has been called.
*
* Args:
* w: Width (output).
* h: Height (output).
*
* Returns: Zero for success, negative value on failure.
*/
void mfc_dec_get_output_size(struct mfc_dec_context*, int *w, int *h);
void mfc_dec_get_crop_size(struct mfc_dec_context*,
int *left, int *top, int *w, int *h);
/*
* Check if there are output frames that can be dequeued.
*
* Returns: Positive value if a frame is available, zero if not.
*/
int mfc_dec_output_available(struct mfc_dec_context*);
/*
* This module use 'input' and 'output' for input to, and output from
* the MFC. The VFL2 names for these interfaces are OUTPUT (for the
* input) and CAPTURE (for the output).
*
* These functions return zero for success, negative value on failure.
*
* When the end of stream has been reached, an empty input frame
* should be enqueued after the last valid input frame. This signal
* to the MFC that EOS has been reached. After this no more input
* frames can be enqueued.
*/
/* Enqueue frame containing compressed data */
int mfc_dec_enqueue_input(struct mfc_dec_context*, struct mfc_buffer *buffer);
/*
* Dequeue a processed input frame. Will block until one is available.
*
* Returns 0 on success, -1 on failure, and -2 on timeout. A timeout
* typically happens if there are no free output buffers available.
*/
int mfc_dec_dequeue_input(struct mfc_dec_context*, struct mfc_buffer **buffer);
/* Enqueue empty output frame */
int mfc_dec_enqueue_output(struct mfc_dec_context*, struct mfc_buffer *buffer);
/*
* Dequeue output frame with image data. This should only be called
* when mfc_dec_output_available() returns true. If this is called
* when mfc_dec_output_available() is not true, subsequent video
* frames may not decode correctly.
*/
int mfc_dec_dequeue_output(struct mfc_dec_context*, struct mfc_buffer **buffer);
/*
* Flush (discard) all enqueued output and input frames. This is
* typically used if we want to seek.
*
* Calling flush resets the "end of stream" state that is entered by
* enqueuing an empty input frame. Thus it is safe to seek at the end
* of the stream as long as mfc_dec_flush() is called first.
*/
int mfc_dec_flush(struct mfc_dec_context*);
/*
* Get pointer to the input data in 'buffer'.
*/
void* mfc_buffer_get_input_data(struct mfc_buffer *buffer);
/*
* Get maximum size of input buffer 'buffer' in bytes.
*/
int mfc_buffer_get_input_max_size(struct mfc_buffer *buffer);
/*
* Set size of data that has been put into 'buffer' in bytes.
*/
void mfc_buffer_set_input_size(struct mfc_buffer *buffer, int size);
/*
* Get pointers to data in output buffer 'buffer'.
*/
void mfc_buffer_get_output_data(struct mfc_buffer *buffer,
void **ybuf, void **uvbuf);
#ifdef __cplusplus
}
#endif
#endif /* VIDEO_EXYNOS4_MFC_V4L2_INCLUDE_MFC_DECODER_H */