gstreamer/sys/mfc/mfc_decoder/mfc_decoder.c

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/*
* Copyright (c) 2012 FXI Technologies
*
* This library is licensed under 2 different licenses and you
* can choose to use it under the terms of any one of them. The
* two licenses are the Apache License 2.0 and the LGPL.
*
* Apache License 2.0:
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*
* 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.
*
* LGPL:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
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*/
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/*
* 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 <unistd.h>
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#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/videodev2.h>
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/* For logging */
#include <gst/gst.h>
GST_DEBUG_CATEGORY (mfc_decoder_debug);
#define GST_CAT_DEFAULT mfc_decoder_debug
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#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;
int input_streamon, output_streamon;
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/*
* 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;
int output_stride[NUM_OUTPUT_PLANES];
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};
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;
}
GST_ERROR ("Invalid codec type %d", codec);
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return 0;
}
int mfc_dec_set_codec(struct mfc_dec_context *ctx, enum mfc_codec_type codec)
{
int ret;
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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);
ret = ioctl(ctx->fd, VIDIOC_S_FMT, &fmt);
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if (ret)
GST_ERROR ("Unable to set input format");
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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) {
GST_ERROR ("Failed to allocate space for input buffer meta data");
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return -1;
}
if (ioctl(ctx->fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
GST_ERROR ("Unable to request input buffers");
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return -1;
}
ctx->num_input_buffers = reqbuf.count;
GST_INFO ("Requested %d input buffers, got %d", num, reqbuf.count);
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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) {
GST_ERROR ("Query of input buffer failed");
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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) {
GST_ERROR ("Failed to map input buffer");
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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) {
GST_ERROR ("Failed to allocate space for output buffer meta data");
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return -1;
}
if (ioctl(ctx->fd, VIDIOC_REQBUFS, &reqbuf) < 0) {
GST_ERROR ("Unable to request output buffers");
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return -1;
}
ctx->num_output_buffers = reqbuf.count;
GST_INFO ("Requested %d output buffers, got %d", num, reqbuf.count);
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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) {
GST_ERROR ("Query of output buffer failed");
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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) {
GST_ERROR ("Failed to map output buffer");
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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;
}
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struct mfc_dec_context* mfc_dec_create(unsigned int codec)
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{
struct mfc_dec_context *ctx;
struct v4l2_capability caps;
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pthread_mutex_lock(&mutex);
if (mfc_in_use) {
GST_ERROR ("Rejected because MFC is already in use");
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pthread_mutex_unlock(&mutex);
return NULL;
}
mfc_in_use = 1;
pthread_mutex_unlock(&mutex);
ctx = calloc(1, sizeof (struct mfc_dec_context));
ctx->output_frames_available = 0;
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if (!ctx) {
GST_ERROR ("Unable to allocate memory for context");
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return NULL;
}
GST_INFO ("Opening MFC device node at: %s", MFC_PATH);
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ctx->fd = open(MFC_PATH, O_RDWR, 0);
if (ctx->fd == -1) {
GST_ERROR ("Unable to open MFC device node: %d", errno);
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free(ctx);
return NULL;
}
if (ioctl (ctx->fd, VIDIOC_QUERYCAP, &caps) < 0) {
GST_ERROR ("Unable to query capabilities: %d", errno);
mfc_dec_destroy(ctx);
return NULL;
}
if ((caps.capabilities & V4L2_CAP_STREAMING) == 0 ||
(caps.capabilities & V4L2_CAP_VIDEO_OUTPUT_MPLANE) == 0 ||
(caps.capabilities & V4L2_CAP_VIDEO_CAPTURE_MPLANE) == 0) {
GST_ERROR ("Required capabilities not available");
mfc_dec_destroy(ctx);
return NULL;
}
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if (mfc_dec_set_codec(ctx, codec) < 0) {
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mfc_dec_destroy(ctx);
return NULL;
}
return ctx;
}
static int get_output_format(struct mfc_dec_context *ctx)
{
int i;
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struct v4l2_format fmt = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
};
if (ioctl(ctx->fd, VIDIOC_G_FMT, &fmt) < 0) {
GST_ERROR ("Failed to get output format");
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return -1;
}
ctx->output_size.w = fmt.fmt.pix_mp.width;
ctx->output_size.h = fmt.fmt.pix_mp.height;
for (i = 0; i < NUM_OUTPUT_PLANES; i++)
ctx->output_stride[i] = fmt.fmt.pix_mp.plane_fmt[i].bytesperline;
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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) {
GST_ERROR ("Unable to get crop data");
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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;
}
static int get_minimum_output_buffers(struct mfc_dec_context *ctx)
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{
struct v4l2_control ctrl = {
.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE,
};
if (ioctl(ctx->fd, VIDIOC_G_CTRL, &ctrl) < 0) {
GST_ERROR ("Failed to get number of output buffers required");
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return -1;
}
ctx->required_output_buffers = ctrl.value + 1;
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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) {
GST_ERROR ("Unable to start input stream");
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return -1;
}
ctx->input_streamon = 1;
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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) {
GST_ERROR ("Unable to start output stream");
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return -1;
}
ctx->output_streamon = 1;
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return 0;
}
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int mfc_dec_init_input(struct mfc_dec_context *ctx, int num_input_buffers)
{
if (request_input_buffers(ctx, num_input_buffers) < 0)
return -1;
return 0;
}
int mfc_dec_init_output(struct mfc_dec_context *ctx, int extra_buffers)
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{
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_output_stride(struct mfc_dec_context *ctx, int *ystride, int *uvstride)
{
*ystride = ctx->output_stride[0];
*uvstride = ctx->output_stride[1];
}
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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 (ctx->output_streamon)
if (ioctl(ctx->fd, VIDIOC_STREAMOFF, &type) < 0)
GST_ERROR ("Streamoff failed on output");
ctx->output_streamon = 0;
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type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
if (ctx->input_streamon)
if (ioctl(ctx->fd, VIDIOC_STREAMOFF, &type) < 0)
GST_ERROR ("Streamoff failed on input");
ctx->input_streamon = 0;
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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);
GST_INFO ("MFC device closed");
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free(ctx);
}
int mfc_dec_enqueue_input(struct mfc_dec_context *ctx, struct mfc_buffer *buffer, struct timeval *timestamp)
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{
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 (timestamp)
qbuf.timestamp = *timestamp;
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if (ioctl(ctx->fd, VIDIOC_QBUF, &qbuf) < 0) {
GST_ERROR ("Enqueuing of input buffer %d failed; prev state: %d",
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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;
}
static int input_dqbuf(struct mfc_dec_context *ctx, struct mfc_buffer **buffer)
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{
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) {
GST_ERROR ("%s: Poll returned error: %d", __func__, errno);
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return -1;
}
if (pollret == 0) {
GST_INFO ("%s: timed out", __func__);
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return -2;
}
if (ioctl(ctx->fd, VIDIOC_DQBUF, &qbuf) < 0) {
GST_ERROR ("Dequeuing failed");
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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) {
GST_INFO ("Nothing to release!");
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return -1;
}
pollret = poll(&fd, 1, MAX_DECODING_TIME);
if (pollret < 0) {
GST_ERROR ("%s: Poll returned error: %d", __func__, errno);
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return -1;
}
if (pollret == 0) {
GST_INFO ("%s: timed out", __func__);
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return -2;
}
GST_DEBUG ("releasing frame; frames queued: %d", ctx->input_frames_queued);
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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) {
GST_ERROR ("Enqueuing of output buffer %d failed; prev state: %d",
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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, struct timeval *timestamp)
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{
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) {
GST_ERROR ("Dequeuing failed");
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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]);
if (timestamp)
*timestamp = qbuf.timestamp;
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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, NULL) < 0)
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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) {
GST_ERROR ("Unable to stop output stream");
2012-12-23 08:56:03 +00:00
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;
}
void mfc_dec_init_debug (void)
{
GST_DEBUG_CATEGORY_INIT (mfc_decoder_debug, "mfc_decoder", 0, "MFC decoder library");
}