libavcodec: Add H264/MPEG4 encoders based on OpenMAX IL

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 823 insertions, 0 deletions

diff --git a/libavcodec/omx.c b/libavcodec/omx.c
new file mode 100644
index 0000000000..6a4a5a1de5
--- /dev/null
+++ b/libavcodec/omx.c
@@ -0,0 +1,823 @@
+/*
+ * OMX Video encoder
+ * Copyright (C) 2011 Martin Storsjo
+ *
+ * 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
+ */
+
+#include <dlfcn.h>
+#include <OMX_Core.h>
+#include <OMX_Component.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/time.h>
+
+#include "libavutil/avstring.h"
+#include "libavutil/avutil.h"
+#include "libavutil/common.h"
+#include "libavutil/imgutils.h"
+#include "libavutil/log.h"
+#include "libavutil/opt.h"
+
+#include "avcodec.h"
+#include "h264.h"
+#include "internal.h"
+
+#ifdef OMX_SKIP64BIT
+static OMX_TICKS to_omx_ticks(int64_t value)
+{
+    OMX_TICKS s;
+    s.nLowPart  = value & 0xffffffff;
+    s.nHighPart = value >> 32;
+    return s;
+}
+static int64_t from_omx_ticks(OMX_TICKS value)
+{
+    return (((int64_t)value.nHighPart) << 32) | value.nLowPart;
+}
+#else
+#define to_omx_ticks(x) (x)
+#define from_omx_ticks(x) (x)
+#endif
+
+#define INIT_STRUCT(x) do {                                               \
+        x.nSize = sizeof(x);                                              \
+        x.nVersion = s->version;                                          \
+    } while (0)
+#define CHECK(x) do {                                                     \
+        if (x != OMX_ErrorNone) {                                         \
+            av_log(avctx, AV_LOG_ERROR,                                   \
+                   "err %x (%d) on line %d\n", x, x, __LINE__);           \
+            return AVERROR_UNKNOWN;                                       \
+        }                                                                 \
+    } while (0)
+
+typedef struct OMXContext {
+    void *lib;
+    OMX_ERRORTYPE (*ptr_Init)(void);
+    OMX_ERRORTYPE (*ptr_Deinit)(void);
+    OMX_ERRORTYPE (*ptr_ComponentNameEnum)(OMX_STRING, OMX_U32, OMX_U32);
+    OMX_ERRORTYPE (*ptr_GetHandle)(OMX_HANDLETYPE*, OMX_STRING, OMX_PTR, OMX_CALLBACKTYPE*);
+    OMX_ERRORTYPE (*ptr_FreeHandle)(OMX_HANDLETYPE);
+    OMX_ERRORTYPE (*ptr_GetComponentsOfRole)(OMX_STRING, OMX_U32*, OMX_U8**);
+    OMX_ERRORTYPE (*ptr_GetRolesOfComponent)(OMX_STRING, OMX_U32*, OMX_U8**);
+} OMXContext;
+
+static av_cold void *dlsym_prefixed(void *handle, const char *symbol, const char *prefix)
+{
+    char buf[50];
+    snprintf(buf, sizeof(buf), "%s%s", prefix ? prefix : "", symbol);
+    return dlsym(handle, buf);
+}
+
+static av_cold int omx_try_load(OMXContext *s, void *logctx,
+                                const char *libname, const char *prefix)
+{
+    s->lib = dlopen(libname, RTLD_NOW | RTLD_GLOBAL);
+    if (!s->lib) {
+        av_log(logctx, AV_LOG_WARNING, "%s not found\n", libname);
+        return AVERROR_ENCODER_NOT_FOUND;
+    }
+    s->ptr_Init                = dlsym_prefixed(s->lib, "OMX_Init", prefix);
+    s->ptr_Deinit              = dlsym_prefixed(s->lib, "OMX_Deinit", prefix);
+    s->ptr_ComponentNameEnum   = dlsym_prefixed(s->lib, "OMX_ComponentNameEnum", prefix);
+    s->ptr_GetHandle           = dlsym_prefixed(s->lib, "OMX_GetHandle", prefix);
+    s->ptr_FreeHandle          = dlsym_prefixed(s->lib, "OMX_FreeHandle", prefix);
+    s->ptr_GetComponentsOfRole = dlsym_prefixed(s->lib, "OMX_GetComponentsOfRole", prefix);
+    s->ptr_GetRolesOfComponent = dlsym_prefixed(s->lib, "OMX_GetRolesOfComponent", prefix);
+    if (!s->ptr_Init || !s->ptr_Deinit || !s->ptr_ComponentNameEnum ||
+        !s->ptr_GetHandle || !s->ptr_FreeHandle ||
+        !s->ptr_GetComponentsOfRole || !s->ptr_GetRolesOfComponent) {
+        av_log(logctx, AV_LOG_WARNING, "Not all functions found in %s\n", libname);
+        dlclose(s->lib);
+        s->lib = NULL;
+        return AVERROR_ENCODER_NOT_FOUND;
+    }
+    return 0;
+}
+
+static av_cold OMXContext *omx_init(void *logctx, const char *libname, const char *prefix)
+{
+    static const char * const libnames[] = {
+        "libOMX_Core.so",
+        "libOmxCore.so",
+        NULL
+    };
+    const char* const* nameptr;
+    int ret = AVERROR_ENCODER_NOT_FOUND;
+    OMXContext *omx_context;
+
+    omx_context = av_mallocz(sizeof(*omx_context));
+    if (!omx_context)
+        return NULL;
+    if (libname) {
+        ret = omx_try_load(omx_context, logctx, libname, prefix);
+        if (ret < 0) {
+            av_free(omx_context);
+            return NULL;
+        }
+    } else {
+        for (nameptr = libnames; *nameptr; nameptr++)
+            if (!(ret = omx_try_load(omx_context, logctx, *nameptr, prefix)))
+                break;
+        if (!*nameptr) {
+            av_free(omx_context);
+            return NULL;
+        }
+    }
+
+    omx_context->ptr_Init();
+    return omx_context;
+}
+
+static av_cold void omx_deinit(OMXContext *omx_context)
+{
+    if (!omx_context)
+        return;
+    omx_context->ptr_Deinit();
+    dlclose(omx_context->lib);
+    av_free(omx_context);
+}
+
+typedef struct OMXCodecContext {
+    const AVClass *class;
+    char *libname;
+    char *libprefix;
+    OMXContext *omx_context;
+
+    AVCodecContext *avctx;
+
+    char component_name[OMX_MAX_STRINGNAME_SIZE];
+    OMX_VERSIONTYPE version;
+    OMX_HANDLETYPE handle;
+    int in_port, out_port;
+    OMX_COLOR_FORMATTYPE color_format;
+    int stride, plane_size;
+
+    int num_in_buffers, num_out_buffers;
+    OMX_BUFFERHEADERTYPE **in_buffer_headers;
+    OMX_BUFFERHEADERTYPE **out_buffer_headers;
+    int num_free_in_buffers;
+    OMX_BUFFERHEADERTYPE **free_in_buffers;
+    int num_done_out_buffers;
+    OMX_BUFFERHEADERTYPE **done_out_buffers;
+    pthread_mutex_t input_mutex;
+    pthread_cond_t input_cond;
+    pthread_mutex_t output_mutex;
+    pthread_cond_t output_cond;
+
+    pthread_mutex_t state_mutex;
+    pthread_cond_t state_cond;
+    OMX_STATETYPE state;
+    OMX_ERRORTYPE error;
+
+    int mutex_cond_inited;
+
+    int num_in_frames, num_out_frames;
+
+    uint8_t *output_buf;
+    int output_buf_size;
+} OMXCodecContext;
+
+static void append_buffer(pthread_mutex_t *mutex, pthread_cond_t *cond,
+                          int* array_size, OMX_BUFFERHEADERTYPE **array,
+                          OMX_BUFFERHEADERTYPE *buffer)
+{
+    pthread_mutex_lock(mutex);
+    array[(*array_size)++] = buffer;
+    pthread_cond_broadcast(cond);
+    pthread_mutex_unlock(mutex);
+}
+
+static OMX_BUFFERHEADERTYPE *get_buffer(pthread_mutex_t *mutex, pthread_cond_t *cond,
+                                        int* array_size, OMX_BUFFERHEADERTYPE **array,
+                                        int wait)
+{
+    OMX_BUFFERHEADERTYPE *buffer;
+    pthread_mutex_lock(mutex);
+    if (wait) {
+        while (!*array_size)
+           pthread_cond_wait(cond, mutex);
+    }
+    if (*array_size > 0) {
+        buffer = array[0];
+        (*array_size)--;
+        memmove(&array[0], &array[1], (*array_size) * sizeof(OMX_BUFFERHEADERTYPE*));
+    } else {
+        buffer = NULL;
+    }
+    pthread_mutex_unlock(mutex);
+    return buffer;
+}
+
+static OMX_ERRORTYPE event_handler(OMX_HANDLETYPE component, OMX_PTR app_data, OMX_EVENTTYPE event,
+                                   OMX_U32 data1, OMX_U32 data2, OMX_PTR event_data)
+{
+    OMXCodecContext *s = app_data;
+    // This uses casts in the printfs, since OMX_U32 actually is a typedef for
+    // unsigned long in official header versions (but there are also modified
+    // versions where it is something else).
+    switch (event) {
+    case OMX_EventError:
+        pthread_mutex_lock(&s->state_mutex);
+        av_log(s->avctx, AV_LOG_ERROR, "OMX error %"PRIx32"\n", (uint32_t) data1);
+        s->error = data1;
+        pthread_cond_broadcast(&s->state_cond);
+        pthread_mutex_unlock(&s->state_mutex);
+        break;
+    case OMX_EventCmdComplete:
+        if (data1 == OMX_CommandStateSet) {
+            pthread_mutex_lock(&s->state_mutex);
+            s->state = data2;
+            av_log(s->avctx, AV_LOG_VERBOSE, "OMX state changed to %"PRIu32"\n", (uint32_t) data2);
+            pthread_cond_broadcast(&s->state_cond);
+            pthread_mutex_unlock(&s->state_mutex);
+        } else if (data1 == OMX_CommandPortDisable) {
+            av_log(s->avctx, AV_LOG_VERBOSE, "OMX port %"PRIu32" disabled\n", (uint32_t) data2);
+        } else if (data1 == OMX_CommandPortEnable) {
+            av_log(s->avctx, AV_LOG_VERBOSE, "OMX port %"PRIu32" enabled\n", (uint32_t) data2);
+        } else {
+            av_log(s->avctx, AV_LOG_VERBOSE, "OMX command complete, command %"PRIu32", value %"PRIu32"\n",
+                                             (uint32_t) data1, (uint32_t) data2);
+        }
+        break;
+    case OMX_EventPortSettingsChanged:
+        av_log(s->avctx, AV_LOG_VERBOSE, "OMX port %"PRIu32" settings changed\n", (uint32_t) data1);
+        break;
+    default:
+        av_log(s->avctx, AV_LOG_VERBOSE, "OMX event %d %"PRIx32" %"PRIx32"\n",
+                                         event, (uint32_t) data1, (uint32_t) data2);
+        break;
+    }
+    return OMX_ErrorNone;
+}
+
+static OMX_ERRORTYPE empty_buffer_done(OMX_HANDLETYPE component, OMX_PTR app_data,
+                                       OMX_BUFFERHEADERTYPE *buffer)
+{
+    OMXCodecContext *s = app_data;
+    append_buffer(&s->input_mutex, &s->input_cond,
+                  &s->num_free_in_buffers, s->free_in_buffers, buffer);
+    return OMX_ErrorNone;
+}
+
+static OMX_ERRORTYPE fill_buffer_done(OMX_HANDLETYPE component, OMX_PTR app_data,
+                                      OMX_BUFFERHEADERTYPE *buffer)
+{
+    OMXCodecContext *s = app_data;
+    append_buffer(&s->output_mutex, &s->output_cond,
+                  &s->num_done_out_buffers, s->done_out_buffers, buffer);
+    return OMX_ErrorNone;
+}
+
+static const OMX_CALLBACKTYPE callbacks = {
+    event_handler,
+    empty_buffer_done,
+    fill_buffer_done
+};
+
+static av_cold int find_component(OMXContext *omx_context, void *logctx,
+                                  const char *role, char *str, int str_size)
+{
+    OMX_U32 i, num = 0;
+    char **components;
+    int ret = 0;
+
+    omx_context->ptr_GetComponentsOfRole((OMX_STRING) role, &num, NULL);
+    if (!num) {
+        av_log(logctx, AV_LOG_WARNING, "No component for role %s found\n", role);
+        return AVERROR_ENCODER_NOT_FOUND;
+    }
+    components = av_mallocz(sizeof(char*) * num);
+    if (!components)
+        return AVERROR(ENOMEM);
+    for (i = 0; i < num; i++) {
+        components[i] = av_mallocz(OMX_MAX_STRINGNAME_SIZE);
+        if (!components) {
+            ret = AVERROR(ENOMEM);
+            goto end;
+        }
+    }
+    omx_context->ptr_GetComponentsOfRole((OMX_STRING) role, &num, (OMX_U8**) components);
+    av_strlcpy(str, components[0], str_size);
+end:
+    for (i = 0; i < num; i++)
+        av_free(components[i]);
+    av_free(components);
+    return ret;
+}
+
+static av_cold int wait_for_state(OMXCodecContext *s, OMX_STATETYPE state)
+{
+    int ret = 0;
+    pthread_mutex_lock(&s->state_mutex);
+    while (s->state != state && s->error == OMX_ErrorNone)
+        pthread_cond_wait(&s->state_cond, &s->state_mutex);
+    if (s->error != OMX_ErrorNone)
+        ret = AVERROR_ENCODER_NOT_FOUND;
+    pthread_mutex_unlock(&s->state_mutex);
+    return ret;
+}
+
+static av_cold int omx_component_init(AVCodecContext *avctx, const char *role)
+{
+    OMXCodecContext *s = avctx->priv_data;
+    OMX_PARAM_COMPONENTROLETYPE role_params = { 0 };
+    OMX_PORT_PARAM_TYPE video_port_params = { 0 };
+    OMX_PARAM_PORTDEFINITIONTYPE in_port_params = { 0 }, out_port_params = { 0 };
+    OMX_VIDEO_PARAM_PORTFORMATTYPE video_port_format = { 0 };
+    OMX_VIDEO_PARAM_BITRATETYPE vid_param_bitrate = { 0 };
+    OMX_ERRORTYPE err;
+    int i;
+
+    s->version.s.nVersionMajor = 1;
+    s->version.s.nVersionMinor = 1;
+    s->version.s.nRevision     = 2;
+
+    err = s->omx_context->ptr_GetHandle(&s->handle, s->component_name, s, (OMX_CALLBACKTYPE*) &callbacks);
+    if (err != OMX_ErrorNone) {
+        av_log(avctx, AV_LOG_ERROR, "OMX_GetHandle(%s) failed: %x\n", s->component_name, err);
+        return AVERROR_UNKNOWN;
+    }
+
+    // This one crashes the mediaserver on qcom, if used over IOMX
+    INIT_STRUCT(role_params);
+    av_strlcpy(role_params.cRole, role, sizeof(role_params.cRole));
+    // Intentionally ignore errors on this one
+    OMX_SetParameter(s->handle, OMX_IndexParamStandardComponentRole, &role_params);
+
+    INIT_STRUCT(video_port_params);
+    err = OMX_GetParameter(s->handle, OMX_IndexParamVideoInit, &video_port_params);
+    CHECK(err);
+
+    s->in_port = s->out_port = -1;
+    for (i = 0; i < video_port_params.nPorts; i++) {
+        int port = video_port_params.nStartPortNumber + i;
+        OMX_PARAM_PORTDEFINITIONTYPE port_params = { 0 };
+        INIT_STRUCT(port_params);
+        port_params.nPortIndex = port;
+        err = OMX_GetParameter(s->handle, OMX_IndexParamPortDefinition, &port_params);
+        if (err != OMX_ErrorNone) {
+            av_log(avctx, AV_LOG_WARNING, "port %d error %x\n", port, err);
+            break;
+        }
+        if (port_params.eDir == OMX_DirInput && s->in_port < 0) {
+            in_port_params = port_params;
+            s->in_port = port;
+        } else if (port_params.eDir == OMX_DirOutput && s->out_port < 0) {
+            out_port_params = port_params;
+            s->out_port = port;
+        }
+    }
+    if (s->in_port < 0 || s->out_port < 0) {
+        av_log(avctx, AV_LOG_ERROR, "No in or out port found (in %d out %d)\n", s->in_port, s->out_port);
+        return AVERROR_UNKNOWN;
+    }
+
+    s->color_format = 0;
+    for (i = 0; ; i++) {
+        INIT_STRUCT(video_port_format);
+        video_port_format.nIndex = i;
+        video_port_format.nPortIndex = s->in_port;
+        if (OMX_GetParameter(s->handle, OMX_IndexParamVideoPortFormat, &video_port_format) != OMX_ErrorNone)
+            break;
+        if (video_port_format.eColorFormat == OMX_COLOR_FormatYUV420Planar ||
+            video_port_format.eColorFormat == OMX_COLOR_FormatYUV420PackedPlanar) {
+            s->color_format = video_port_format.eColorFormat;
+            break;
+        }
+    }
+    if (s->color_format == 0) {
+        av_log(avctx, AV_LOG_ERROR, "No supported pixel formats (%d formats available)\n", i);
+        return AVERROR_UNKNOWN;
+    }
+
+    in_port_params.bEnabled   = OMX_TRUE;
+    in_port_params.bPopulated = OMX_FALSE;
+    in_port_params.eDomain    = OMX_PortDomainVideo;
+
+    in_port_params.format.video.pNativeRender         = NULL;
+    in_port_params.format.video.bFlagErrorConcealment = OMX_FALSE;
+    in_port_params.format.video.eColorFormat          = s->color_format;
+    s->stride     = avctx->width;
+    s->plane_size = avctx->height;
+    // If specific codecs need to manually override the stride/plane_size,
+    // that can be done here.
+    in_port_params.format.video.nStride      = s->stride;
+    in_port_params.format.video.nSliceHeight = s->plane_size;
+    in_port_params.format.video.nFrameWidth  = avctx->width;
+    in_port_params.format.video.nFrameHeight = avctx->height;
+    if (avctx->framerate.den > 0 && avctx->framerate.num > 0)
+        in_port_params.format.video.xFramerate = (1 << 16) * avctx->framerate.num / avctx->framerate.den;
+    else
+        in_port_params.format.video.xFramerate = (1 << 16) * avctx->time_base.den / avctx->time_base.num;
+
+    err = OMX_SetParameter(s->handle, OMX_IndexParamPortDefinition, &in_port_params);
+    CHECK(err);
+    err = OMX_GetParameter(s->handle, OMX_IndexParamPortDefinition, &in_port_params);
+    CHECK(err);
+    s->stride         = in_port_params.format.video.nStride;
+    s->plane_size     = in_port_params.format.video.nSliceHeight;
+    s->num_in_buffers = in_port_params.nBufferCountActual;
+
+    err = OMX_GetParameter(s->handle, OMX_IndexParamPortDefinition, &out_port_params);
+    out_port_params.bEnabled   = OMX_TRUE;
+    out_port_params.bPopulated = OMX_FALSE;
+    out_port_params.eDomain    = OMX_PortDomainVideo;
+    out_port_params.format.video.pNativeRender = NULL;
+    out_port_params.format.video.nFrameWidth   = avctx->width;
+    out_port_params.format.video.nFrameHeight  = avctx->height;
+    out_port_params.format.video.nStride       = 0;
+    out_port_params.format.video.nSliceHeight  = 0;
+    out_port_params.format.video.nBitrate      = avctx->bit_rate;
+    out_port_params.format.video.xFramerate    = in_port_params.format.video.xFramerate;
+    out_port_params.format.video.bFlagErrorConcealment  = OMX_FALSE;
+    if (avctx->codec->id == AV_CODEC_ID_MPEG4)
+        out_port_params.format.video.eCompressionFormat = OMX_VIDEO_CodingMPEG4;
+    else if (avctx->codec->id == AV_CODEC_ID_H264)
+        out_port_params.format.video.eCompressionFormat = OMX_VIDEO_CodingAVC;
+
+    err = OMX_SetParameter(s->handle, OMX_IndexParamPortDefinition, &out_port_params);
+    CHECK(err);
+    err = OMX_GetParameter(s->handle, OMX_IndexParamPortDefinition, &out_port_params);
+    CHECK(err);
+    s->num_out_buffers = out_port_params.nBufferCountActual;
+
+    INIT_STRUCT(vid_param_bitrate);
+    vid_param_bitrate.nPortIndex     = s->out_port;
+    vid_param_bitrate.eControlRate   = OMX_Video_ControlRateVariable;
+    vid_param_bitrate.nTargetBitrate = avctx->bit_rate;
+    err = OMX_SetParameter(s->handle, OMX_IndexParamVideoBitrate, &vid_param_bitrate);
+    if (err != OMX_ErrorNone)
+        av_log(avctx, AV_LOG_WARNING, "Unable to set video bitrate parameter\n");
+
+    if (avctx->codec->id == AV_CODEC_ID_H264) {
+        OMX_VIDEO_PARAM_AVCTYPE avc = { 0 };
+        INIT_STRUCT(avc);
+        avc.nPortIndex = s->out_port;
+        err = OMX_GetParameter(s->handle, OMX_IndexParamVideoAvc, &avc);
+        CHECK(err);
+        avc.nBFrames = 0;
+        avc.nPFrames = avctx->gop_size - 1;
+        err = OMX_SetParameter(s->handle, OMX_IndexParamVideoAvc, &avc);
+        CHECK(err);
+    }
+
+    err = OMX_SendCommand(s->handle, OMX_CommandStateSet, OMX_StateIdle, NULL);
+    CHECK(err);
+
+    s->in_buffer_headers  = av_mallocz(sizeof(OMX_BUFFERHEADERTYPE*) * s->num_in_buffers);
+    s->free_in_buffers    = av_mallocz(sizeof(OMX_BUFFERHEADERTYPE*) * s->num_in_buffers);
+    s->out_buffer_headers = av_mallocz(sizeof(OMX_BUFFERHEADERTYPE*) * s->num_out_buffers);
+    s->done_out_buffers   = av_mallocz(sizeof(OMX_BUFFERHEADERTYPE*) * s->num_out_buffers);
+    if (!s->in_buffer_headers || !s->free_in_buffers || !s->out_buffer_headers || !s->done_out_buffers)
+        return AVERROR(ENOMEM);
+    for (i = 0; i < s->num_in_buffers && err == OMX_ErrorNone; i++)
+        err = OMX_AllocateBuffer(s->handle, &s->in_buffer_headers[i],  s->in_port,  s, in_port_params.nBufferSize);
+    CHECK(err);
+    s->num_in_buffers = i;
+    for (i = 0; i < s->num_out_buffers && err == OMX_ErrorNone; i++)
+        err = OMX_AllocateBuffer(s->handle, &s->out_buffer_headers[i], s->out_port, s, out_port_params.nBufferSize);
+    CHECK(err);
+    s->num_out_buffers = i;
+
+    if (wait_for_state(s, OMX_StateIdle) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Didn't get OMX_StateIdle\n");
+        return AVERROR_UNKNOWN;
+    }
+    err = OMX_SendCommand(s->handle, OMX_CommandStateSet, OMX_StateExecuting, NULL);
+    CHECK(err);
+    if (wait_for_state(s, OMX_StateExecuting) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Didn't get OMX_StateExecuting\n");
+        return AVERROR_UNKNOWN;
+    }
+
+    for (i = 0; i < s->num_out_buffers && err == OMX_ErrorNone; i++)
+        err = OMX_FillThisBuffer(s->handle, s->out_buffer_headers[i]);
+    if (err != OMX_ErrorNone) {
+        for (; i < s->num_out_buffers; i++)
+            s->done_out_buffers[s->num_done_out_buffers++] = s->out_buffer_headers[i];
+    }
+    for (i = 0; i < s->num_in_buffers; i++)
+        s->free_in_buffers[s->num_free_in_buffers++] = s->in_buffer_headers[i];
+    return err != OMX_ErrorNone ? AVERROR_UNKNOWN : 0;
+}
+
+static av_cold void cleanup(OMXCodecContext *s)
+{
+    int i, executing;
+
+    pthread_mutex_lock(&s->state_mutex);
+    executing = s->state == OMX_StateExecuting;
+    pthread_mutex_unlock(&s->state_mutex);
+
+    if (executing) {
+        OMX_SendCommand(s->handle, OMX_CommandStateSet, OMX_StateIdle, NULL);
+        wait_for_state(s, OMX_StateIdle);
+        OMX_SendCommand(s->handle, OMX_CommandStateSet, OMX_StateLoaded, NULL);
+        for (i = 0; i < s->num_in_buffers; i++) {
+            OMX_BUFFERHEADERTYPE *buffer = get_buffer(&s->input_mutex, &s->input_cond,
+                                                      &s->num_free_in_buffers, s->free_in_buffers, 1);
+            OMX_FreeBuffer(s->handle, s->in_port, buffer);
+        }
+        for (i = 0; i < s->num_out_buffers; i++) {
+            OMX_BUFFERHEADERTYPE *buffer = get_buffer(&s->output_mutex, &s->output_cond,
+                                                      &s->num_done_out_buffers, s->done_out_buffers, 1);
+            OMX_FreeBuffer(s->handle, s->out_port, buffer);
+        }
+        wait_for_state(s, OMX_StateLoaded);
+    }
+    if (s->handle) {
+        s->omx_context->ptr_FreeHandle(s->handle);
+        s->handle = NULL;
+    }
+
+    omx_deinit(s->omx_context);
+    s->omx_context = NULL;
+    if (s->mutex_cond_inited) {
+        pthread_cond_destroy(&s->state_cond);
+        pthread_mutex_destroy(&s->state_mutex);
+        pthread_cond_destroy(&s->input_cond);
+        pthread_mutex_destroy(&s->input_mutex);
+        pthread_cond_destroy(&s->output_cond);
+        pthread_mutex_destroy(&s->output_mutex);
+        s->mutex_cond_inited = 0;
+    }
+    av_freep(&s->in_buffer_headers);
+    av_freep(&s->out_buffer_headers);
+    av_freep(&s->free_in_buffers);
+    av_freep(&s->done_out_buffers);
+    av_freep(&s->output_buf);
+}
+
+static av_cold int omx_encode_init(AVCodecContext *avctx)
+{
+    OMXCodecContext *s = avctx->priv_data;
+    int ret = AVERROR_ENCODER_NOT_FOUND;
+    const char *role;
+    OMX_BUFFERHEADERTYPE *buffer;
+    OMX_ERRORTYPE err;
+
+    s->omx_context = omx_init(avctx, s->libname, s->libprefix);
+    if (!s->omx_context)
+        return AVERROR_ENCODER_NOT_FOUND;
+
+    pthread_mutex_init(&s->state_mutex, NULL);
+    pthread_cond_init(&s->state_cond, NULL);
+    pthread_mutex_init(&s->input_mutex, NULL);
+    pthread_cond_init(&s->input_cond, NULL);
+    pthread_mutex_init(&s->output_mutex, NULL);
+    pthread_cond_init(&s->output_cond, NULL);
+    s->mutex_cond_inited = 1;
+    s->avctx = avctx;
+    s->state = OMX_StateLoaded;
+    s->error = OMX_ErrorNone;
+
+    switch (avctx->codec->id) {
+    case AV_CODEC_ID_MPEG4:
+        role = "video_encoder.mpeg4";
+        break;
+    case AV_CODEC_ID_H264:
+        role = "video_encoder.avc";
+        break;
+    default:
+        return AVERROR(ENOSYS);
+    }
+
+    if ((ret = find_component(s->omx_context, avctx, role, s->component_name, sizeof(s->component_name))) < 0)
+        goto fail;
+
+    av_log(avctx, AV_LOG_INFO, "Using %s\n", s->component_name);
+
+    if ((ret = omx_component_init(avctx, role)) < 0)
+        goto fail;
+
+    if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
+        while (1) {
+            buffer = get_buffer(&s->output_mutex, &s->output_cond,
+                                &s->num_done_out_buffers, s->done_out_buffers, 1);
+            if (buffer->nFlags & OMX_BUFFERFLAG_CODECCONFIG) {
+                if ((ret = av_reallocp(&avctx->extradata, avctx->extradata_size + buffer->nFilledLen + AV_INPUT_BUFFER_PADDING_SIZE)) < 0) {
+                    avctx->extradata_size = 0;
+                    goto fail;
+                }
+                memcpy(avctx->extradata + avctx->extradata_size, buffer->pBuffer + buffer->nOffset, buffer->nFilledLen);
+                avctx->extradata_size += buffer->nFilledLen;
+                memset(avctx->extradata + avctx->extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+            }
+            err = OMX_FillThisBuffer(s->handle, buffer);
+            if (err != OMX_ErrorNone) {
+                append_buffer(&s->output_mutex, &s->output_cond,
+                              &s->num_done_out_buffers, s->done_out_buffers, buffer);
+                av_log(avctx, AV_LOG_ERROR, "OMX_FillThisBuffer failed: %x\n", err);
+                ret = AVERROR_UNKNOWN;
+                goto fail;
+            }
+            if (avctx->codec->id == AV_CODEC_ID_H264) {
+                // For H264, the extradata can be returned in two separate buffers
+                // (the videocore encoder on raspberry pi does this);
+                // therefore check that we have got both SPS and PPS before continuing.
+                int nals[32] = { 0 };
+                int i;
+                for (i = 0; i + 4 < avctx->extradata_size; i++) {
+                     if (!avctx->extradata[i + 0] &&
+                         !avctx->extradata[i + 1] &&
+                         !avctx->extradata[i + 2] &&
+                         avctx->extradata[i + 3] == 1) {
+                         nals[avctx->extradata[i + 4] & 0x1f]++;
+                     }
+                }
+                if (nals[NAL_SPS] && nals[NAL_PPS])
+                    break;
+            } else {
+                if (avctx->extradata_size > 0)
+                    break;
+            }
+        }
+    }
+
+    return 0;
+fail:
+    return ret;
+}
+
+
+static int omx_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
+                            const AVFrame *frame, int *got_packet)
+{
+    OMXCodecContext *s = avctx->priv_data;
+    int ret = 0;
+    OMX_BUFFERHEADERTYPE* buffer;
+    OMX_ERRORTYPE err;
+
+    if (frame) {
+        uint8_t *dst[4];
+        int linesize[4];
+        buffer = get_buffer(&s->input_mutex, &s->input_cond,
+                            &s->num_free_in_buffers, s->free_in_buffers, 1);
+
+        buffer->nFilledLen = av_image_fill_arrays(dst, linesize, buffer->pBuffer, avctx->pix_fmt, s->stride, s->plane_size, 1);
+        av_image_copy(dst, linesize, (const uint8_t**) frame->data, frame->linesize, avctx->pix_fmt, avctx->width, avctx->height);
+        buffer->nFlags = OMX_BUFFERFLAG_ENDOFFRAME;
+        buffer->nOffset = 0;
+        // Convert the timestamps to microseconds; some encoders can ignore
+        // the framerate and do VFR bit allocation based on timestamps.
+        buffer->nTimeStamp = to_omx_ticks(av_rescale_q(frame->pts, avctx->time_base, AV_TIME_BASE_Q));
+        err = OMX_EmptyThisBuffer(s->handle, buffer);
+        if (err != OMX_ErrorNone) {
+            append_buffer(&s->input_mutex, &s->input_cond, &s->num_free_in_buffers, s->free_in_buffers, buffer);
+            av_log(avctx, AV_LOG_ERROR, "OMX_EmptyThisBuffer failed: %x\n", err);
+            return AVERROR_UNKNOWN;
+        }
+        s->num_in_frames++;
+    }
+
+    while (!*got_packet && ret == 0) {
+        // Only wait for output if flushing and not all frames have been output
+        buffer = get_buffer(&s->output_mutex, &s->output_cond,
+                            &s->num_done_out_buffers, s->done_out_buffers,
+                            !frame && s->num_out_frames < s->num_in_frames);
+        if (!buffer)
+            break;
+
+        if (buffer->nFlags & OMX_BUFFERFLAG_CODECCONFIG && avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
+            if ((ret = av_reallocp(&avctx->extradata, avctx->extradata_size + buffer->nFilledLen + AV_INPUT_BUFFER_PADDING_SIZE)) < 0) {
+                avctx->extradata_size = 0;
+                goto end;
+            }
+            memcpy(avctx->extradata + avctx->extradata_size, buffer->pBuffer + buffer->nOffset, buffer->nFilledLen);
+            avctx->extradata_size += buffer->nFilledLen;
+            memset(avctx->extradata + avctx->extradata_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+        } else {
+            if (buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME)
+                s->num_out_frames++;
+            if (!(buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME) || !pkt->data) {
+                // If the output packet isn't preallocated, just concatenate everything in our
+                // own buffer
+                int newsize = s->output_buf_size + buffer->nFilledLen + AV_INPUT_BUFFER_PADDING_SIZE;
+                if ((ret = av_reallocp(&s->output_buf, newsize)) < 0) {
+                    s->output_buf_size = 0;
+                    goto end;
+                }
+                memcpy(s->output_buf + s->output_buf_size, buffer->pBuffer + buffer->nOffset, buffer->nFilledLen);
+                s->output_buf_size += buffer->nFilledLen;
+                if (buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME) {
+                    if ((ret = av_packet_from_data(pkt, s->output_buf, s->output_buf_size)) < 0) {
+                        av_freep(&s->output_buf);
+                        s->output_buf_size = 0;
+                        goto end;
+                    }
+                    s->output_buf = NULL;
+                    s->output_buf_size = 0;
+                }
+            } else {
+                // End of frame, and the caller provided a preallocated frame
+                if ((ret = ff_alloc_packet(pkt, s->output_buf_size + buffer->nFilledLen)) < 0) {
+                    av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n",
+                           (int)(s->output_buf_size + buffer->nFilledLen));
+                    goto end;
+                }
+                memcpy(pkt->data, s->output_buf, s->output_buf_size);
+                memcpy(pkt->data + s->output_buf_size, buffer->pBuffer + buffer->nOffset, buffer->nFilledLen);
+                av_freep(&s->output_buf);
+                s->output_buf_size = 0;
+            }
+            if (buffer->nFlags & OMX_BUFFERFLAG_ENDOFFRAME) {
+                ret = pkt->size;
+                pkt->pts = av_rescale_q(from_omx_ticks(buffer->nTimeStamp), AV_TIME_BASE_Q, avctx->time_base);
+                // We don't currently enable b-frames for the encoders, so set
+                // pkt->dts = pkt->pts. (The calling code behaves worse if the encoder
+                // doesn't set the dts).
+                pkt->dts = pkt->pts;
+                if (buffer->nFlags & OMX_BUFFERFLAG_SYNCFRAME)
+                    pkt->flags |= AV_PKT_FLAG_KEY;
+                *got_packet = 1;
+            }
+        }
+end:
+        err = OMX_FillThisBuffer(s->handle, buffer);
+        if (err != OMX_ErrorNone) {
+            append_buffer(&s->output_mutex, &s->output_cond, &s->num_done_out_buffers, s->done_out_buffers, buffer);
+            av_log(avctx, AV_LOG_ERROR, "OMX_FillThisBuffer failed: %x\n", err);
+            ret = AVERROR_UNKNOWN;
+        }
+    }
+    return ret;
+}
+
+static av_cold int omx_encode_end(AVCodecContext *avctx)
+{
+    OMXCodecContext *s = avctx->priv_data;
+
+    cleanup(s);
+    return 0;
+}
+
+#define OFFSET(x) offsetof(OMXCodecContext, x)
+#define VDE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_ENCODING_PARAM
+static const AVOption options[] = {
+    { "omx_libname", "OpenMAX library name", OFFSET(libname), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VDE },
+    { "omx_libprefix", "OpenMAX library prefix", OFFSET(libprefix), AV_OPT_TYPE_STRING, { 0 }, 0, 0, VDE },
+    { NULL }
+};
+
+static const enum AVPixelFormat omx_encoder_pix_fmts[] = {
+    AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE
+};
+
+static const AVClass omx_mpeg4enc_class = {
+    .class_name = "mpeg4_omx",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+AVCodec ff_mpeg4_omx_encoder = {
+    .name             = "mpeg4_omx",
+    .long_name        = NULL_IF_CONFIG_SMALL("OpenMAX IL MPEG4 video encoder"),
+    .type             = AVMEDIA_TYPE_VIDEO,
+    .id               = AV_CODEC_ID_MPEG4,
+    .priv_data_size   = sizeof(OMXCodecContext),
+    .init             = omx_encode_init,
+    .encode2          = omx_encode_frame,
+    .close            = omx_encode_end,
+    .pix_fmts         = omx_encoder_pix_fmts,
+    .capabilities     = AV_CODEC_CAP_DELAY,
+    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
+    .priv_class       = &omx_mpeg4enc_class,
+};
+
+static const AVClass omx_h264enc_class = {
+    .class_name = "h264_omx",
+    .item_name  = av_default_item_name,
+    .option     = options,
+    .version    = LIBAVUTIL_VERSION_INT,
+};
+AVCodec ff_h264_omx_encoder = {
+    .name             = "h264_omx",
+    .long_name        = NULL_IF_CONFIG_SMALL("OpenMAX IL H264 video encoder"),
+    .type             = AVMEDIA_TYPE_VIDEO,
+    .id               = AV_CODEC_ID_H264,
+    .priv_data_size   = sizeof(OMXCodecContext),
+    .init             = omx_encode_init,
+    .encode2          = omx_encode_frame,
+    .close            = omx_encode_end,
+    .pix_fmts         = omx_encoder_pix_fmts,
+    .capabilities     = AV_CODEC_CAP_DELAY,
+    .caps_internal    = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
+    .priv_class       = &omx_h264enc_class,
+};